Which are characteristic of type Rh negative blood? a: Always has Rh (anti-D) antibodiesb: Only under certain conditions will Rh (anti-D) antibodies be presentc: Always has Rh (D) antigend: Only under certain conditions will the Rh (D) antigen be presente: Is inherited independent of the ABO group
A. a, c
B. b, c, e
C. a, e
D. b, e
E. a, d, e
Answer: D
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Which is a physiological description rather than an anatomical one?
?A. The muscles of the intestinal wall contract slowly and involuntarily.? B. The walls of blood capillaries are composed of a thin epithelium.? C. The muscles of the thigh are composed of skeletal muscle tissue. ?D. There are fenestrations (openings) in the epithelial cells of capillary walls.?E. The esophageal wall includes a middle layer of dense irregular connective tissue.
Which of the following is not a reason for erythrocytes' flattened "doughnut" shape?
A) It allows them to fit together with leukocytes to facilitate the transport of both. B) It allows the minimum distance for diffusion of gases. C) It increases the surface area available for gas diffusion. D) It allows them to "stack" together to pass through small blood vessels more efficiently. E) It gives them flexibility so that they can pass through the circulation more easily.
Which substance is thought to reduce the perception of pain by inhibiting substance P?
A) endorphin B) dopamine C) glutamine D) histamine
Which sequence correctly traces the visual pathway followed by the majority of axons? a: Optic nerveb: Optic chiasmc: Occipital lobed: Lateral geniculate nucleus of thalamus
A. c, a, b, d B. a, b, d, c C. a, d, c, b D. b, a, d, c E. a, b, c, d