Which of these does not contribute to the cessation of the signal in a synaptic transmission?
A. The axon terminal reabsorbs some neurotransmitters by endocytosis.
B. Enzymes in the postsynaptic cell break down some neurotransmitters.
C. Neurotransmitter escapes from the synapse into the nearby extracellular fluid.
D. Neurotransmitters are no longer released.
E. Synaptic vesicles secrete neurotransmitter by exocytosis.
Answer: E
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A) acetylcholine B) norepinephrine C) dopamine D) serotonin E) nitric oxide
ATP formation in the electron transport system is called ________.
A. oxidative phosphorylation B. substrate level phosphorylation C. direct phosphorylation D. Both substrate level phosphorylation and direct phosphorylation are correct.
Which of the following statements regarding the vestibular system is TRUE?
A. Deflection of the basilar membrane by fluid moving within the semicircular canals allows us to detect rotational movement of the head. B. The utricle and saccule are mainly responsible for detecting angular rotation of the head. C. The vestibular apparatus is principally involved in our ability to detect and interpret sound. D. Receptors in the utricle and saccule detect changes in the position of the head with respect to gravity. E. Hair cells in the cochlea are involved in the detection of movement and position of the head.
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