Both "turn on" factors (hormonal, humoral, and neural stimuli) and "turn off" factors (feedback inhibition and others) may be modulated by the activity of the nervous system
Indicate whether the statement is true or false
TRUE
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When a nerve impulse reaches the transmissive segment of a neuron,
A. calcium is pumped into the neuron and neurotransmitter diffuses out through channels. B. calcium is released from the neuron along with neurotransmitter from synaptic vesicles. C. calcium diffuses into the neuron and neurotransmitter is released by exocytosis. D. calcium and neurotransmitter diffuse into the synaptic knob. E. calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.
Aquaporins may be employed during:
A) simple diffusion. B) endocytosis. C) active transport. D) osmosis.
The prenatal period during which the major organ systems form is the
A. fetal period. B. germinal period. C. embryonic period. D. neonatal period.
Precapillary sphincters will
A. control blood flow into the true capillaries. B. cause blood to flow directly from the metarteriole into the postcapillary venule. C. open when the tissue needs nutrients. D. close when the tissue's needs have been met. E. All of the answers are correct.