During the development of the fetus, which must be present before hair can form?
A. Hair follicles
B. Vernix caseosa
C. Vellus
D. Lanugo
E. None of these answers are correct as they all will appear after the formation of scalp hair.
Answer: A
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Which of the following is not characteristic of the cytoskeleton?
a. the cytoskeleton supports the plasma membrane and is responsible for the particular shape, rigidity, and spatial geometry of each different cell type. b. the cytoskeleton probably plays a role in regulating cell growth and division. c. the cytoskeletal elements are all rigid, permanent structures. d. the cytoskeleton is responsible for cell contraction and cell movements. e. the cytoskeleton supports and organizes the ribosomes, mitochondria, and lysosomes.
Which of the following statements is FALSE?
A) Sympathetic has extensive branching of preganglionic fibers; parasympathetic has minimal branching of preganglionic fibers. B) Sympathetic origin is craniosacral; parasympathetic is thoracolumbar. C) Sympathetic division has short preganglionic and long postganglionic fibers; parasympathetic has long preganglionic and short postganglionic fibers. D) Sympathetic ganglia are within a few centimeters of the CNS; parasympathetic ganglia are close to the visceral organs served.
Where are the renal pyramids found in the kidney?
A) medulla B) cortex C) hilum D) None of the listed responses is correct.
Which of the following structures belong to the inner ear?
A. Tensor tympani muscle B. Incus C. Semicircular duct D. Helix E. Tympanic membrane