The variations in ion concentration between intracellular and external fluids, as well as the relative permeabilities of the plasma membrane to various ion species, are the fundamental determinants of the resting membrane potential.
What three things enable us to preserve resting membrane potential?The quantity of ions both within and outside of the cell, the permeability of the cell membrane to those ions (ion conductance through specific ion channels), and the activity of electrogenic pumps all play major roles in determining membrane potentials in cells.
What is a normal neuron's resting membrane potential?An average neuron's resting membrane potential is -70 mV. (millivolts). A change in a neuron's resting membrane potential signals the start of all neuronal actions.
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Which of these choices do both sustainable and organic agriculture avoid?
A. Artificial hormones
B. USDA certification
C. Pesticides
D. Antibiotics
Answer:
A.Artifical hormones
Explanation:
Just did it
Artificial hormone are avoided both in sustainable and organic agriculture.
In organic and sustainable farming plants and crops are grown by maintaining natural ecosystem by avoiding use of any synthetic substance.What is organic farming?It is also called biological or natural farming.It use fertilizers of nature origin such as compost manure, green manure.People emphasis in the crop rotation and companion planting.To know more about organic farming here
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What happen after you drink mineral water, does it go to kidney and how it get removed
Answer:
dont know hope it helpsjcjdjc
damage to cilia and irritation of the respiratory tract lining by components of smoke increase susceptibility to infectious diseases. group of answer choices true false
True. Damage to cilia and irritation of the respiratory tract lining by components of smoke can increase susceptibility to infectious diseases.
Cilia are small, hair-like structures that line the respiratory tract and help to remove particles and germs from the air. When these cilia are damaged, it can reduce their ability to filter out germs, leading to a greater risk of infection. Similarly, irritation of the respiratory tract lining caused by smoke can increase inflammation and reduce the ability of the lining to prevent the entry of germs.
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The nervous system is made up of blank______ of communicating cells.
Answer:
neurons convey information
Can hormones made in one part of the body work in another part of the body?
Answer:
The endocrine system is the collection of glands that produce hormones that regulate metabolism, growth and development, tissue function,
reproduction, sleep, and mood, among other things.
Explanation:
Which one is it please somebody help me
Answer:ikfoddpspspssp[gfogo[s]offp'
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Explanation:
What layer of the blood vessel wall is composed of circularly arranged layers of smooth muscle cells?
The layer of the blood vessel wall composed of circularly arranged layers of smooth muscle cells is the tunica media.
It is the thickest layer of the vessel wall and is located between the tunica intima and the tunica adventitia. Tunica media is composed of an inner circular layer of smooth muscle cells and an outer longitudinal layer of smooth muscle cells. It is responsible for regulating the diameter of the vessel and, therefore, blood flow and pressure. When the smooth muscle cells contract, the diameter of the vessel decreases, and blood flow and pressure increase. On the other hand, when the smooth muscle cells relax, the diameter of the vessel increases, and blood flow and pressure decrease.
Tunica media is more developed in arteries than in veins. In arteries, the smooth muscle cells are more numerous and organized in multiple layers, while in veins, they are fewer and organized in a single layer. This is because arteries need to withstand the higher pressure generated by the heart, while veins need to resist the backflow of blood caused by gravity.
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The space between the parietal layer and visceral layer of the pericardium contains ______. Multiple choice question. adipose tissue and blood lymphatic tissue serous fluid
The space between the parietal layer and visceral layer of the pericardium contains serous fluid. It is a tissue of the hearth.
What is pericardium?The pericardium is one of the three tissues that form the hearth, which also includes the myocardium and epicardium.
The pericardium forms a highly fibrous structure that is capable of holding heart tissues and blood vessels.
Pericardial fluid is composed of a serous liquid that is produced by the pericardium and released into the pericardial cavity.
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A certain culture of the bacterium Rhodobacter sphaeroides initially has 30 bacteria and is observed to double every 4 hours.
(a) Find an exponential model n(t) = n02t/a
for the number of bacteria in the culture after t hours.
n(t) = (b) Estimate the number of bacteria after 17 hours. (Round your answer to the nearest whole number.)
bacteria
(c) After how many hours will the bacteria count reach 1 million? (Round your answer to one decimal place.)
The amount of bacteria inside the cultures following t hours is predicted by the exponential function n(t) = n02t/a and is 60.1 hours.
A number of bacteria inside the culture following t hours may be predicted using an exponential model, n(t) = n02t/a. n(t) = 30•2t/4
b) how many germs are present after 17 hours.
Microorganism n(17) = 30•217/4 = 571 microorganisms
Will there be one million bacteria (c) hours 1,000,000 = 30•2t/4 100000/3 = 2t/4
100000/3 = 2t/4 log2(100000/3)
15.02467797 = t/4
t equals 60.1.
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which environmental change is most likely to affect the long-term stability of an ecosystem?
Answer:
B
Explanation:
all other answers are temporary and ineffective to case any serious change long term.
A is seasonal meaning it comes and going in short species are adapted to it
C is just like A they'll come back once the mating process is over
D it's just a path it doesn't upset the ecosystem to a large degree. trees won't be cut down and a minimum as possible vegetation will be cut down.
B will case a great shift in the ecosystem because the invading plant will occupy all resources and all materials required for other plants to thrive therefore killing them. this will cause primary consumers to reduce in population and we know where that ends
Which of the following effects is least likely to be as a result of deforestation?
A: A greater risk of flooding.
B: An increase in biodiversity.
C: An increase in soil erosion.
D: An increase in the level of carbon dioxide in the atmosphere.
The effect that is least likely to be a result of deforestation is an increase in biodiversity. That is option B.
Deforestation is a practice that encourages the clearing of forests for other purposes such as agricultural croplands, urbanization, or mining activities.
This practice needs to be avoided because:
posses a greater risk of flooding as deforestation erodes the soil.they provide a protective cover for the soil against the action of wind and rain thereby preventing soil erosion.the level of carbon dioxide in the atmosphere decreases as it is cleared by trees during photosynthesis.But deforestation leads to a decrease in biodiversity instead of an increase.
Deforestation can lead to biodiversity loss. This occurs when animal species that live in the trees no longer have their habitat, cannot relocate, and therefore become extinct.
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Demethylation and acetylation lead to an open chromatin structure and are associated with ________regions of genomes.
Answer:
euchromatic
Explanation:
PLEASE HURRY, I'LL GIVE YOU 25 POINTS!
A scientist found a correlation between honeybees and a certain species of flowering plant. When the bee population increases, so does the flowering plant population. And when the flowering plant population decreases so does the bee population. To find out whether each change in population CAUSED the other population to change, what could the scientist do?
A. Investigate the populations of two other species of plants and insects to see if they have a similar correlation.
B. Investigate the populations of the honeybee and plant species in areas where the other species is not present.
C. Have several other scientists examine the data to see if they see the same correlation.
D. Repeat the observations to see if the new data show the same correlation.
To find out if the change in one population is due to the other population, the scientist can: B. investigate the populations of the honeybee and plant species in areas where the other species is not present.
By doing so, the scientist can see if similar relationships exist between other plant and insect species too. And if that is the case then prove his hypothesis null. If no such relationship is observed between bees and other flowering plant species or the same species of flowering plant and some other insect, then it might confirm his alternative hypothesis. Moreover, he can repeat the observations after doing this to see if the new data also reports the same findings and correlation.Hence, the correct answer is option B.
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Scientists have observed the exponential growth of lionfish in the caribbean sea. Which of these predictions about the future of the lionfish population is the most likely to occur?.
Scientists have observed the exponential growth of lionfish in the Caribbean sea. The prediction about the lionfish population that is most likely to occur will be B. a limiting factor will cause the growth of the lionfish population to slow down, forming a pattern of logistic growth.
According to logistic growth, the population of a species will increase exponentially when favorable conditions are provided. However, the increase in population cannot occur forever and there will be a time when the carrying capacity will be reached by the concerned population. Due to one or more limiting factors, the population growth will slow down to maintain a balance.
In the case observed, scientists have observed exponential growth in the lionfish population in the Caribbean sea. After this phase, factors such as reduction in the number of prey, increased toxicity, increased competition, etc will play as limiting factors to slow down the growth of the population of lionfish.
Although a part of your question is missing, you might be referring to this question:
Scientists have observed the exponential growth of lionfish in the Caribbean sea. Which of these predictions about the future of the lionfish population is the most likely to occur?
A. The lionfish population will continue growing exponentially indefinitely.
B. A limiting factor will cause the growth of the lionfish population to slow down, forming a pattern of logistic growth.
C. A limiting factor will cause the lionfish population to decline rapidly, and eventually decrease to near zero.
D. The lionfish population will enter a cycle of increasing and decreasing numbers, typical of many predators and prey.
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What features between birds and theropods would be considered homologous structures?
An old house was torn down. Small plants and grasses grew in a vacant lot. Over the next few years, bushes and tree seedlings began to grow is this primary or secondary ?
1. What would it mean for a population double? 2. What would be needed to provide for all those people?3. If a population grows too quickly and infrastructure (like water and energy supply, sanitation systems, and housing availability) can’t keep up, what might be the consequences?
If the infrastructure of a place cannot provide the necessary resources to a population, the quality of life decreases. For example, the lack of water increases the rate of disease due to lack of hygiene, likewise, if the shortage is extreme it can also increase mortality due to dehydration in low-income people. Lack of electricity would also affect mortality rates, since it would affect telecommunications and hospital care, for example.
whats Part of the neuron that receives messages
The part of the neuron that receives messages are called Dendrites .
Dendrites are the branching, tree-like structures that extend from the cell body of a neuron. They are specialized for receiving signals from other cells, such as other neurons, and for transmitting signals to the cell body. They are typically composed of an array of tubular structures known as microtubules and contain a variety of protein molecules that allow them to detect and process signals. Dendrites are essential to neuronal communication, as they allow neurons to receive information from other neurons and integrate this information with the neuron’s own activity.
Therefore, the dendrites are the part of the neuron that specialize in receiving messages from other neurons.
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Since the nineteenth-century, it was hypothesized that humans have an inferior sense of smell compared to other mammals that rely on smell. What do you think this hypothesis was based on?
The hypothesis that humans have an inferior sense of smell compared to other mammals was likely based on observations of the relatively smaller size of the olfactory bulb in humans and the perception that humans rely less on smell for survival and navigation.
The olfactory bulb is a brain structure involved in processing odor information. In humans, the olfactory bulb is smaller in size compared to other mammals, leading to the assumption that our sense of smell is less developed. Additionally, the emphasis on visual and auditory senses in human communication and navigation, rather than relying heavily on scent, may have contributed to the perception of an inferior sense of smell in humans.
The hypothesis of humans having an inferior sense of smell compared to other mammals was likely based on the smaller size of the olfactory bulb in humans and the perception that humans rely less on smell for survival and sensory perception. However, recent research has challenged this hypothesis, highlighting that humans are capable of detecting and distinguishing a wide range of odors.
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Imagine you step outside on a extremely cold day. Describe the path of information Travels are the nervous system in the musculoskeletal system and how they would respond to try to maintain homeostasis.
The sensory receptors in the skin detect the cold and send signals to the brain through sensory neurons in the nervous system.
The brain then sends signals through motor neurons to the muscles in the musculoskeletal system, causing shivering and increased blood flow to maintain body temperature.
What are the sensory receptors?
When you step outside on an extremely cold day, sensory receptors in your skin detect the change in temperature and send electrical signals, known as action potentials, to your spinal cord and brain via sensory neurons in the peripheral nervous system.
The spinal cord and brain process the information and send signals via motor neurons back to the muscles in your body, causing them to contract and generate heat, in an effort to maintain your body's internal temperature and maintain homeostasis. This process is called shivering.
Additionally, the muscles in your blood vessels contract, reducing blood flow to the skin's surface to conserve heat and prevent heat loss. The hairs on your skin also stand on end, creating an insulating layer of air around your skin to keep you warm. This is commonly known as "goosebumps."
Overall, the nervous system and musculoskeletal system work together to maintain homeostasis by generating heat and conserving heat in response to changes in temperature on an extremely cold day.
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Answer:
The sensory receptors in the skin detect the cold and send signals to the brain through sensory neurons in the nervous system.
The brain then sends signals through motor neurons to the muscles in the musculoskeletal system, causing shivering and increased blood flow to maintain body temperature.
What are the sensory receptors?
When you step outside on an extremely cold day, sensory receptors in your skin detect the change in temperature and send electrical signals, known as action potentials, to your spinal cord and brain via sensory neurons in the peripheral nervous system.
The spinal cord and brain process the information and send signals via motor neurons back to the muscles in your body, causing them to contract and generate heat, in an effort to maintain your body's internal temperature and maintain homeostasis. This process is called shivering.
Additionally, the muscles in your blood vessels contract, reducing blood flow to the skin's surface to conserve heat and prevent heat loss. The hairs on your skin also stand on end, creating an insulating layer of air around your skin to keep you warm. This is commonly known as "goosebumps."
Overall, the nervous system and musculoskeletal system work together to maintain homeostasis by generating heat and conserving heat in response to changes in temperature on an extremely cold day.
Explanation: i took the test
A desert that contains plants and animals that have been there for a long time is an example of
what three different mechanisms can cause the entropy of a control volume to change
A control volume entropy may fluctuate due to one of three processes.
The heat transmission between the control volume and its surroundings can have an impact on entropy. A heated reservoir can transfer heat to the control volume, while a cool reservoir can transfer heat to the control volume.
Whether entropy is rising or falling depends on the direction of heat transmission.The mass flow by adding matter to the control volume or by removing it, mass flow can have an impact on entropy.
Entropy variations in the control volume can be influenced by the mass flow's direction and type.
Work transfer: Work can have an impact on a control volume's entropy as well. External factors or internal forces can both work to modify the control volume.
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Based on the materials of the course, which of the following statements is true?
Select one:
a. Based on OSHA requirements, it is more likely to make human immunodeficiency virus (HIV) vaccination mandatory for the housekeeping staff.
b. OSHA requires the front desk staff to be vaccinated against human immunodeficiency virus (HIV).
c. OSHA requires all staff in large hotels to be vaccinated against human immunodeficiency virus (HIV).
d. OSHA requires food and beverage department’s staff to be vaccinated against human immunodeficiency virus (HIV)
Based on the materials of the course, it is more likely to make human immunodeficiency virus (HIV) vaccination mandatory for the housekeeping staff is the correct statement. OSHA stands for Occupational Safety and Health Administration. Option A is correct
OSHA is the United States federal agency that is in charge of enforcing laws that deal with workplace safety, health, and occupational health. OSHA was established in 1971, and its primary mission is to ensure that employers are providing their employees with a safe and healthy working environment. OSHA has a wide range of regulatory powers that are used to ensure that employers are in compliance with the laws and regulations that deal with workplace safety and health.
Human immunodeficiency virus (HIV) vaccination is significant as HIV is a virus that damages the immune system, which is responsible for defending the body against illness. Without proper treatment, HIV can develop into acquired immunodeficiency syndrome (AIDS).There is currently no cure for HIV, but antiretroviral therapy (ART) is a treatment that can help manage the virus.
Vaccinations for Hepatitis B and HIV are now available to employees who work in settings where they may be exposed to infectious diseases. These vaccines can help reduce the risk of exposure to infectious diseases in the workplace. Therefore, it is more likely to make human immunodeficiency virus (HIV) vaccination mandatory for the housekeeping staff. Option A is correct
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Explain why every cell that is produced from the genetically modified bacterium
will be able to produce insulin.
Answer:
Recombinant DNA is technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory. Then they remove a loop of bacterial DNA known as a plasmid and insert the human insulin gene into the plasmid. Researchers return the plasmid to the bacteria and put the “recombinant” bacteria in large fermentation tanks. There, the recombinant bacteria use the gene to begin producing human insulin. Scientists harvest the insulin from the bacteria and purify the substance for use as a medicine for people.
Explanation:
If the rate of atrial depolarization was normal while the rate of ventricular depolarization was slower than normal, where would you expect to find a dysfunction in the electrical conduction pathway of the heart?.
You will find a dysfunction in the QRS complex of the electrical conduction pathway of the heart if the atrial depolarization is normal and the rate of ventricular depolarization is slower.
The waveform QRS complex represents the second acrion, ventricular depolarization. Q,R,S waves are included in the QRS complex; in rare circumstances, the q wave may not be seen. QRS measurements consist of 1.5-3 tiny boxes and take 06-.12 seconds. It calculates the complex from the first deflection following the P wave to the point where the S wave hits the isoelectric line (Period of zero electrical activity).
Ventricular depolarization is facilitated in part by an auxiliary route (AP) that connects the atrial and ventricle and is therefore capable of transferring electrical impulses into the ventricle without using the AV-His Purkinje conduction system.
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is this an endothermic or exothermic reaction
Explanation:
An endothermic reaction is a chemical reaction that absorbs (or use) energy overall.
An exothermic reaction is a chemical reaction that releases energy by light or heat.
Why do you think that the digestive process takes so long?
Answer:
Your body breaks down your food into nutrients which is why it takes hours to fully digest food.The human body breaks down the
Food into Einto amino acids, starches into simple sugars, and fats into fatty acids and glycerol.
Another name for a fertilized egg is a
Answer: The fertilized ovum, now called a zygote, is ready for the first mitotic cell division.
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What force is needed to accelerate a 25 Kilogram
surface of 7 m/s2?
Would the following be classified as a carbohydrate, lipid, protein, or nucleic acid?
Carbohydrate
Lipid
Protein
Nucleic Acid
Answer:
nucleic acid and it must not be the others