The role of acetylcholine in the digestive tract is to _________, while the role of norepinephrine is to ______
A. stimulate, stimulate
B. stimulate, inhibit
C. inhibit, inhibit
D. inhibit, stimulate
B
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The level of organization one step more complex than the organ level is the______ level.
Fill in the blank with correct word.
Which of the following blood vessels is not a great blood vessel of the heart?
What will be an ideal response?
As acidity increases, how does this affect the affinity of hemoglobin for the oxygen it carries?
A. Hemoglobin loses its affinity for oxygen. B. Oxyhemoglobin affinity decreases. C. Oxyhemoglobin affinity remains the same. D. Oxyhemoglobin affinity increases. E. None of the choices are correct.
Non-REM sleep
A. is a time when the brain is very active. B. is characterized by movements of the eyes. C. is where we have our most memorable dreams. D. comprises most of our sleep time.