The mechanism by which the neurotransmitter is returned to a presynaptic neuron's axon terminal is specific for each neurotransmitter. Which of the following neurotransmitters is broken down by an enzyme before being returned?
A. Glutamate
B. Acetylcholine
Answer: B. Acetylcholine
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Which of the following is not an autoimmune disease?
A. Anaphylaxis B. Systemic lupus erythematosus C. Rheumatic fever D. Type I diabetes mellitus E. Rheumatoid arthritis
The part of the female reproductive cycle during which estrogen secretion reaches its highest level is:
a. menarche b. the secretory phase c. the proliferative phase d. menopause
The resilience of bone is primarily due to which of the following?
sacrificial bonds in or between collagen molecules amount of mineral salts in the bone presence of osteoblasts in the bone amount of mineral salt and protein in the bone
The formation of thick calluses from manual labor is an example of fibrosis.
Answer the following statement true (T) or false (F)