Vagal influences on the heart result in
a. enhanced calcium permeability at the SA node
b. enhanced potassium permeability at the SA node
c. less frequent depolarization of the SA node
d. both a and b
e. both b and c
E
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The basis of neural integration is
A) spontaneous activity in pacemaker neurons. B) command signals from central pattern generators. C) addition of postsynaptic potentials overlapping in time and space. D) the area under the curve of postsynaptic potentials overlapping in time and space.
Correctly match the term and definition: Microvilli.
A)Long, cellular projections that are tail-like and aid in propulsion B)Small, barrel-shaped structures oriented at right angles to each other; form the bases of cilia and flagella C)Tiny fingerlike projections of the plasma membrane; increase surface area for absorption D)Motile cellular extensions found in large numbers in some epithelial cells
In the testis, haploid cells that have completed meiosis are called:
a. Leydig cells b. Sertoli cells c. Spermatids d. Spermatocytes e. Spermatogonia
Which spinal nerve is linked to the skin covering the deltoid muscle?
A) C8 B) C7 C) C6 D) C5