Edema in an upper extremity following a mastectomy is the result of:
A) localized vasoconstriction.
B) decreased lymphatic drainage.
C) obstruction of a large blood vessel.
D) surgery-induced inflammation.
Answer: B) decreased lymphatic drainage.
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Which of the following mechanisms are causal explanations for bird song?
A. Young males learned their song from their fathers. B. Songs are used by males to attract a mate. C. The ritualization of the vocalization became species specific. D. Air passing through a bird's specialized singing organ, the syrinx, vibrates the surrounding organs.
A single exposure to HPV results in infection _______ of the time
A. 10% B. 30% C. 60% D. 100%
A fish with a cartilaginous skeleton and paired fins would be in the group:a
Actinopterygii. b. Crinoidea. c. Cephalochordates. d. Urochordates. e. Chondrichthyes
During S phase ((A)_______), neuronal progenitor cells in the neural tube will be localized at the (B)________.
a. (A) mitotic stage (B) ventricular zone b. (A) mitotic stage (B) marginal zone c. (A) DNA synthesis stage (B) ventricular zone d. (A) DNA synthesis stage (B) marginal zone