Retinaldehyde (retinal) is derived from ________.
A. opsin
B. vitamin A
C. vitamin C
D. vitamin D
Answer: B
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Which of the following factors is the most potent stimulus for inhibition of gastric motility?
a. fat in the duodenum b. acid in the duodenum c. acid in the stomach d. distention of the stomach e. hypertonicity of the duodenal contents
The blood vessel that supplies blood to the cerebral arterial circle from the posterior is the ________ artery
A) basilar B) middle cerebral C) vertebral D) internal carotid E) posterior cerebral
Catecholamines are the most abundant neurotransmitters in the CNS.
Answer the following statement true (T) or false (F)
Amino acids can be used to synthesize proteins for cellular structures, to synthesize proteins that function in various body processes, and for energy.
Answer the following statement true (T) or false (F)