This valve is found between the right atrium and the right ventricle.
A. Mitral
B. Tricuspid
C. Bicuspid
D. Semilunar
Answer: B. Tricuspid
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Chemical buffer systems
a. respond in one to three minutes to changes in hydrogen ion concentration b. stimulate the respiratory center when acidosis occurs c. promote H+ excretion by the kidneys when acidosis occurs d. are the most powerful mechanism for regulating changes in [H+] within the body e. buffer changes in acid or base levels
The colon is an organ included in which body system?
A. Gastrointestinal B. Cardiovascular C. Integumentary D. Reproductive
Amelogen is a protein that is very abundant in:
a. Cementum b. Dentin c. Enamel d. The periodontal ligament e. The pulp cavity of a tooth
Auditory "startle" reflexes originate in the:
a. precentral gyrus b. superior colliculi c. inferior colliculi d. intermediate mass