________ stimulates Ca2+ deposition by osteoblasts and Ca2+ excretion by the kidneys.
A. Parathyroid hormone
B. Thyroid hormones
C. Calcitonin
D. Aldosterone
Answer: C
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Which structure in the figure secretes an alkaline fluid that protects sperm by neutralizing acids in the urethra?
a) C b) H c) B d) G e) F
During which phase of the crossbridge cycle is ATP split into ADP and Pi?
A. Immediately preceding the detachment of the myosin head B. Immediately preceding the resetting of the myosin head C. Immediately preceding the power stroke
The fibrous joints between the flat bones of the skull are sutures
Indicate whether the statement is true or false
Glycine and GABA act as inhibitory neurotransmitters in the CNS because they bind to Cl- channels on the postsynaptic membrane.
Answer the following statement true (T) or false (F)