Which of these combinations represents a convergent pathway in the nervous system?
A) One presynaptic neuron synapses with four postsynaptic neurons.
B) One presynaptic neuron synapses with one postsynaptic neuron.
C) Three presynaptic neurons synapse with one postsynaptic neuron.
D) An afferent neuron synapses with an association neuron.
E) Collateral axons from a presynaptic neuron synapse with several postsynaptic neurons.
Answer: C) Three presynaptic neurons synapse with one postsynaptic neuron.
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Vesicles are formed from the
A. cell membrane. B. nuclear membrane. C. mitochondrial membrane. D. lysosomal membrane.
Circular folds are
A) ridges in the wall of the stomach. B) pleats in the lining of the small intestine. C) fingerlike projections on the surface of the mucosa of the small intestine. D) sacculations in the colon. E) abnormal structures formed by excessive pressure in the small intestine.
A neuromuscular synapse is a type of ________ synapse in which a neuron communicates with a muscle fiber instead of another neuron.
Fill in the blank(s) with the appropriate word(s).
Which of the following muscles is the prime mover for inhalation?
A. Hyoglossus B. External intercostals C. Diaphragm D. Internal intercostals E. Stylohyoid