A double-stranded chromosome consists of two genetically identical sister chromatids. What important biological event produced the sister chromatids?
A. Crossing over
B. Reduction division
C. Mitosis
D. Genetic mutation
E. DNA replication
Answer: E
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Mechanoreceptors that respond to changes in blood pressure are called
A) nociceptors. B) baroreceptors. C) chemoreceptors. D) proprioceptors. E) thermoreceptors.
Which formed elements are most responsible for humoral immunity?
A. Cytotoxic T cells B. Helper T cells C. B lymphocytes D. Mast cells E. Neutrophils
Gastrin causes
A) inhibition of HCl secretion. B) increases in the secretion of chief cells and parietal cells. C) the conversion of pepsin into pepsinogen. D) the upper esophageal sphincter to open. E) the pyloric sphincter to alternately open and close.
All the following tropic hormones are released by the anterior pituitary except
What will be an ideal response?