That they both has a path of energy through the trophic levels of an ecosystem
<h2>Answer:</h2>
These calls have highest rate of division:
- Hair follicles cells
- Mucous lining cells.
- Nails cells.
- Red blood cells
Answer:
The correct answers are: Neurotransmitter Vesicles, Acetylcholine, Contraction.
Explanation:
- At the neuro-muscular junction, impulses are transmitted in the following manner:
- The impulse is carried by an action potential (variable opening and closing of different ion channels located on the membrane of the neurons allowing variable ion movement) to the neuron at the neuro-muscular junction.
- The action potential causes the opening of the voltage dependent calcium channels in the axon terminal of the neuron allowing the entry of calcium ions.
- This causes the neurotransmitter vesicles containing the neurotransmitter acetylcholine to fuse with the pre-synaptic membrane.
- Acetylcholine is released by the method of exocytosis into the synaptic cleft.
- The acetylcholine molecules bind to the the cognate receptors present in the membrane of the muscle cell (sarcolemma).
- This causes the flow of sodium ions into and potassium ions out of the muscle cell, which generates action potential in the muscle cell.
- This action potential causes the muscle cell to contract.
C because the arrows are pointing away from them (brainless??)
Answer:
- Respiratory system
- Nervous system
- Circulatory system
- Integumentary system
- Endocrine system
Explanation:
During excessive hard work or sports, the respiratory system acts to provide sufficient oxygen for energy supply (ATP) - a process takes place in mitochondria. At the very beginning, the respiratory system is active. If the person doesn't intake sufficient water, he will feel tired because of heavy breathing that increases body temperature and affects metabolic reactions. A supply of water would help decrease the respiration need and so support other systems.
The nervous system (hypothalamus) regulates the body temperature which is necessary for metabolic reactions taking place within the body, i.e. homeostasis. During and after exercise, the water intake was not sufficient, this means that the hypothalamus would work to maintain the temperature as well as other metabolic mechanisms. In the case of less water intake, the nervous system would be in stress.
The circulatory system acts to transport blood and oxygen to all parts of the body. During sports activities, the oxygen supply would be high to maintain energy supply. This takes place with the combined action of the circulatory system and respiratory system. For optimal functioning, the circulatory system needs fluids (water) intake because sufficient water is already lost during sports.
The integumentary system is the system that directly protects the body from damages including dehydration. Therefore, in this case, it will be highly active.
The endocrine system consists of glands that produce hormones to control body metabolism. The body metabolism, as mentioned before, is driven through water availability. The reduced water in the body would also put the endocrine system under pressure.
