Which of the following correctly describes mechanisms of CO2 transport?
A) 7-10% of CO2 is dissolved directly into the plasma
B) 20% of CO2 is carried in the form of carbaminohemoglobin
C) as bicarbonate ion in plasma
D) attached to the heme part of hemoglobin
D) attached to the heme part of hemoglobin
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A sound stimulus of approximately ______ dB can be damaging to your hearing in as little as 15 minutes.
A. 60 or anything over 100 B. 80 or anything over 100 C. 100 or anything over 100 D. 120 or anything over 100
Match the following:
A) Ectopic focus B) Infarction C) Ischemia D) Fibrillation E) Quiescent period 1) Heart muscle is deprived of oxygen. 2) Death of heart muscle cells. 3) A condition of rapid and irregular or out-of-phase contraction of heart muscle cells. 4) An abnormal pacemaker. 5) Total heart relaxation.
Which is false about synovial joints?
A. Synovial fluid is secreted by the synovial membrane. B. All articulating bone surfaces are covered with articular cartilage. C. Ligaments strengthen and reinforce joints. D. Synovial joints are enclosed by fibrous articular capsules. E. Blood circulates within the joint cavity to nourish the articular cartilage.
Exocrine glands differ from endocrine glands in that exocrine glands
A) secrete only into the bloodstream. B) secrete only local hormones. C) only secrete salts. D) secrete through ducts or tubes to the body's exterior.