The narrow space that separates the motor neuron and the skeletal muscle fiber in a neuromuscular junction is called the
A. motor end plate.
B. synaptic vesicle.
C. synaptic cleft.
D. synaptic knob.
C
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Aldosterone:
a. increases blood sodium levels b. decreases blood sodium levels c. increases blood potassium levels d. both B and C above
The first heart sound heard during the cardiac cycle is associated with ________
A) opening of the AV valves B) closure of the AV valves C) closure of the semilunar valves D) opening of the semilunar valves
Protein catabolism results in:
A) amino acids. B) nucleic acids. C) fatty acids. D) nucleotides.
Only autosomal trisomies involving chromosomes 13, 18, and 21 are survivable. Why is this?
A. These are redundant chromosomes. B. These are relatively short chromosomes. C. These chromosomes have no genes. D. These are relatively long chromosomes. E. These are relatively gene-poor chromosomes.