Facial muscles are unusual in that they
A. represent a combination of first-class and second-class lever systems.
B. insert and sometimes originate on skin and connective tissue.
C. are smooth muscles rather than skeletal muscles.
D. are not involved in movement.
E. are not involved in facial expression.
B
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By the end of gestation, maternal blood volume normally increases by almost ________ percent
A) 20 B) 25 C) 50 D) 80 E) 100
An area of the retina that contains only cones and is the site of sharpest vision is the
A) optic disc. B) inner segment. C) fovea. D) outer segment. E) tapetum lucidum.
The long tube that carries food to the stomach is called the:
A) ascending colon B) descending colon C) jejunum D) esophagus
Within a kidney, which of the following vessels is found in the greatest number?
A. Interlobar arteries B. Afferent arterioles C. Arcuate arteries D. Cortical radiate arteries E. Renal arteries