Exposed collagen in a damaged vessel
a. activates factor XII to initiate blood clotting
b. initiates platelet aggregation
c. secretes ADP, which causes platelets to become sticky
d. causes a and b
e. causes a and c
D
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About 90% of all cancers originate from
A) connective tissue. B) muscle tissue. C) nervous tissue. D) epithelium.
In a reflex arc, ___________ neurons pass out of the central nervous system to
stimulate effectors. Fill in the blank(s) with correct word
The role of the pituitary hormone LH in males is to
A) stimulate the interstitial cells to produce testosterone. B) stimulate the sustentacular cells to produce inhibin. C) initiate sperm production in the testes. D) develop and maintain secondary sex characteristics. E) influence sexual behaviors and sex drive.
The hyoid bone is part of the ________ skeleton.
A. axial B. appendicular