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week 14
physiology
| Question | Answer |
|---|---|
| What is the basic function of a neuron? | To transmit electrical and chemical signals throughout the body. |
| What is an action potential? | A rapid electrical signal that travels down the axon of a neuron. |
| What triggers an action potential? | A stimulus strong enough to cause depolarization, reaching the threshold potential. |
| What is depolarization? | When sodium (Na⁺) ions rush into the neuron, making the inside more positive. |
| What is repolarization? | The return of the neuron to its resting state, usually by potassium (K⁺) ions flowing out. |
| What does the Central Nervous System (CNS) consist of? | The brain and spinal cord. |
| What is the main function of the CNS? | To process and coordinate sensory information and issue instructions. |
| What does the Peripheral Nervous System (PNS) include? | All nerves outside the CNS, including cranial and spinal nerves. |
| What are the two main divisions of the PNS? | The somatic nervous system and the autonomic nervous system. |
| What is the endocrine system? | A system of glands that secrete hormones directly into the bloodstream to regulate body functions. |
| What is a hormone? | A chemical messenger secreted by endocrine glands that affects target organs or tissues. |
| What are endocrine glands? | Ductless glands that release hormones directly into the blood. |
Created by:
asiaerwilliams
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