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Set 2 Week 7-13
| Question | Answer |
|---|---|
| What event must occur to trigger an action potential? | Membrane must depolarize to threshold. |
| What is the function of the CNS? | Processes sensory input and creates motor responses to maintain homeostasis. |
| Which system responds faster: nervous or endocrine? | Nervous system. |
| What are the three components of the circulatory system? | Heart, blood, and blood vessels. |
| What is the main function of the lymphatic system? | Returns interstitial fluid to the bloodstream. |
| Where does gas exchange occur? | In the alveoli. |
| What is the main function of the digestive system? | Break down food and absorb nutrients. |
| Which ANS division controls “fight or flight”? | Sympathetic division |
| What do neurotransmitters and hormones have in common? | Both bind to receptors on target cells. |
| What molecule in red blood cells carries oxygen? | Hemoglobin. |
| What do lymph nodes do? | Filter lymph and house immune cells. |
| Why is digestion necessary for survival? | Cells need nutrients for energy and growth. |