Which of the following is an effect of aging on the respiratory system?
A. vital capacity is unchanged
B. minute ventilation rates increase
C. residual volume increases
D. gas exchange in the lungs remains unchanged
C
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If a person has AB type blood which of the ABO blood types can they receive as a transfusion?
What will be an ideal response
Explain the role of exposure to antigens in the development of the immune system in the fetus and in the primary and secondary immune responses in children and adults. How does this compare to the role of innate immunity?
What will be an ideal response?
Which of the following is not a function of the lymphatic system?
a. defense against disease. b. return of fluid to the circulatory system. c. transport of fat molecules. d. regulation of sodium balance. e. return of proteins to the circulatory system.
The ______________ is (are) formed when the vertebral arteries unite at the base of the brain.
A. subclavian arteries B. common carotid arteries C. external carotid arteries D. internal carotid arteries E. cerebral arterial circle (circle of Willis)