What passage carries food between the pharynx and the stomach?
Esophagus
Answer:
Action potential in a motor neuron triggers the release of acetylcholine (ACh) neurotransmitter.
Explanation:
Acetylcholine: It is a neurotransmitter released by motor neurons which bind to the receptors end plates of the motor. When an action potential travel down the motor neuron's axon, neurotransmitter release occurs resulting in an influx of calcium and altered permeability of the synaptic terminal membrane.
The Ca2+ ions allow synaptic vesicles to move and bind with the presynaptic membrane which is present on the neuron and released neurotransmitter from the vesicles into the synaptic cleft. Once it's released ACh diffusion occurs across the synaptic cleft to the motor end plate, and binds with ACh receptor. As the neurotransmitter ACh binds, these ions channel open and sodium ions cross the membrane into the muscle cells.
In this phase reduction of voltage inside and outside the cell occurs, which is known as depolarization. When ACh binds to the motor end plate this depolarization is known as end plate potential. Then depolarization spread with the sarcolemma and creating an action potential. This action potential moves the entire cell and creating a wave of depolarization.
Answer: The answer would be nucleus.
Explanation:
The nucleus is well known for the command center. That’s how you get the answer.
Answer:
- Radiometric dating methods
Explanation:
Researchers use a clock to estimate the date a rock or fossil was produced in order to ascertain its age. Radiometric dating methods, which are based on the natural radioactive decay of specific elements like potassium and carbon, are widely used by geologists to date ancient events.
<u>OAmalOHopeO</u>
Mature elodea leaves has the average of 35 chloroplasts in each cell while young elodea leaf has the average of 25 chloroplasts in each cell.
Elodea cell is a plant cell that has many organelles such as a nucleus, many chloroplasts, a hard cell wall, a thin and transparent cell membrane, cytoplasm, and a central vacuole. The number of chloroplasts present in each elodea cell is determined by some factors such as the age of the leaves and the presence of any plant growth stimulants. Mature elodea leaves have the tendency to have more chloroplasts than young elodea leaves. Mature elodea leaves has the average of 35 chloroplasts in each cell while young elodea leaf has the average of 25 chloroplasts in each cell.
