The influence of CO2 and acid on the release of O2 from hemoglobin is known as the:
a. Frank effect
b. Bohr effect
c. Fick's constant
d. Boyle's law
e. dissociation curve
b
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Blood from the systemic circuit returns to the heart via the __________.
Fill in the blank(s) with the appropriate word(s).
Different T-cell receptors can respond to different antigens because of different
A. complement binding sites in the receptors. B. variable regions in the structure of the receptors. C. antigenic determinants. D. epitopes in the receptor's structure. E. selection processes.
Parietal arteries that branch from the thoracic (descending) aorta
A. supply the thoracic organs. B. include the posterior intercostal arteries. C. include the anterior intercostal arteries. D. include the superior phrenic arteries. E. include both the posterior intercostal arteries and include the superior phrenic arteries.
Answer the following statements true (T) or false (F)
1. In pulmonary circulation, veins carry oxygen-poor blood. In systemic circulation, veins carry oxygen-rich blood. 2. Both a myocardial infarction and angina pectoris are a result of an insufficient amount of oxygen getting to the heart muscle. 3. The stroke volume of a normal resting adult is about 5 liters. 4. Cardiac output is the volume of blood pumped by one ventricle in 1 minute. 5. During exercise, the greatest increase in blood flow is to the cardiac muscle.