The portion of the urethra that penetrates the urogenital diaphragm is the
A) membranous urethra.
B) penile urethra.
C) corpus spongiosum.
D) spongy urethra.
E) vascular urethra.
A
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The pressure created in the ventricles is called the ________ pressure because ________.
Fill in the blank(s) with the appropriate word(s).
What is the primary fuel source for the brain?
a. neurotransmitters b. electrolytes c. fatty acids d. amino acids e. glucose
In nerve deafness:
a. there is interference with the normal transfer of vibrations from the tympanic membrane to the oval window. b. vibrations cannot reach the oval window. c. the problem lies within the cochlea or somewhere along the auditory pathway. d. one of the causes could be immobilization of one or more auditory ossicles by fluid.
Which of the following statements concerning propagation of action potentials is incorrect?
a. saltatory conduction occurs in myelinated nerve fibers. b. during conduction by local current flow, there is a flow of current between the active and adjacent inactive area of the cell membrane, thereby decreasing the potential in the inactive area to threshold. c. the action potential jumps from one Schwann cell to the adjacent Schwann cell in a myelinated fiber. d. saltatory conduction is faster than conduction by local current flow. e. conduction by local current flow is the method of propagation in unmyelinated fibers.