At a synapse, the receptors for the neurotransmitters are located ________.
A. in the cytosol of the postsynaptic neuron
B. in the synaptic cleft
C. on the plasma membrane of the presynaptic neuron
D. on the plasma membrane of the postsynaptic neuron
Answer: D
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The highlighted structure separates the stomach from the ________.
A disease that attacks and disables the myenteric plexus would
A) increase intestinal motility. B) decrease intestinal motility. C) increase gastric secretion. D) decrease gastric secretion. E) interfere with both intestinal motility and gastric secretion.
A deficiency in vitamin ______ may lead to bleeding problems
A. A B. K C. D D. E E. C
Which of the following is an example of positive feedback?
A) release of PTH in response to low calcium levels B) ADH release due to low blood pressure C) release of oxytocin in response to smooth muscle contraction in the uterus D) release of insulin in response to high blood sugar E) release of insulin in response to low blood sugar