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Marina Vardapetyan

SCI 7-13

QuestionAnswer
What triggers a neuron to fire a nerve impulse? A neuron fires when a stimulus causes its membrane to reach threshold and create an action potential
How do neurotransmitters help neurons communicate? Neurotransmitters cross the synapse and bind to receptors on the next cell to pass the signal forward
What is the main job of the CNS? The CNS interprets sensory information and sends out responses to maintain homeostasis
How is the ANS different from the PNS? The ANS controls involuntary actions like heart rate, while the PNS carries all voluntary and sensory nerve signals
How do the nervous and endocrine systems work together to control the body? They work together by sending signals neurotransmitters act quickly through nerves, while hormones travel through the bloodstream more slowly to regulate body functions.
What is the main role of the circulatory system? The circulatory system pumps blood to deliver oxygen and nutrients to tissues while removing waste products
what is the main job of the lymphatic system? It returns excess interstitial fluid to the bloodstream to prevent fluid buildup and support immune function
Why is the respiratory system essential for homeostasis? It provides oxygen and removes carbon dioxide to maintain stable internal conditions in the body
What is the primary function of the digestive system? Its main job is to break down food and absorb nutrients so the body’s cells can use them
How does the digestive system make nutrients available to the body? It mechanically and chemically breaks down food so nutrients can be absorbed into the bloodstream and transported to cells
Created by: user-1991014
 

 



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