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Assignment 2
Weeks 7-13
Question | Answer |
---|---|
Acetylcholine is in the same class of neurotransmitters as: | none of the above |
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: | saltatory conduction |
"Fight or flight" physiological changes include all of the following except: | constriction of respiratory airways |
Both sympathetic and parasympathetic divisions are tonically active, which means they | contiunually conduct impulses to autonomic effectors |
Which of the following is NOT an example of sympathetic stimulation? | constriction of the bronchioles |
Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation. | True |
Accomodation for near vision necessitates | an increase in the curvature of the lens, constriction of the pupils, convergence of the two eyes |
Which of the following is true about pain receptors? | alpha fibers are associated with sharp, localized pain |
From which vessels do myocardial cells recieve blood? | coronary arteries |
The vagus is said to act as a "brake" on the heart. This situation is called | vagal inhibition |
The chemoreceptors in the carotid bodies are particularly sensitive to: | hypercapnia |