A constant blood supply to this organ is a priority of the circulatory system:
a. heart.
b. kidney.
c. brain.
d. muscle.
e. liver.
C
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The internal structure that permits stiffening of the penis consists of three columns of ________.
Fill in the blank(s) with the appropriate word(s).
If neuron X causes hyperpolarization, then what does it cause in a postsynaptic neuron?
a. Increased PNa+ and PK+ b. Increased PK+ or PCl- c. Increased influx of protein anions d. Increased permeability to calcium ions e. Either b or c
The deep groove on the ventral surface that extends the length of the spinal cord is the
A) anterior median fissure. B) central canal. C) central sulcus. D) longitudinal fissure.
Which of the following hormones is NOT matched correctly with the cells that secrete it?
A. lactotrophs: prolactin B. somatotrophs: growth hormone C. gonadotrophs: FSH, LH D. thyrotrophs: thyroxine, triiodothyronine E. corticotrophs: ACTH