Which gland is unique in that it is large in the fetus and infant, but is a small remnant in the elderly?
a) adrenal gland
b) pancreas
c) thymus
d) thyroid gland
Answer: c) thymus
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Which statement accurately describes total blood flow?
A. Total blood flow equals cardiac output and is a fixed number given that there is a finite amount of blood in the body. B. Total blood flow equals cardiac output and can vary significantly over time with activity levels. C. Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in liters. D. Total blood flow is measured as the sum of blood flow to upper and lower extremities and is measured in beats per minute. E. Changes in total blood flow are accompanied by equivalent changes in local blood flow in all areas of the body.
The midpiece of the sperm tail contains mostly ________
Fill in the blanks with correct word
Clone cells capable of secreting large amounts of antibodies are called _____
A. memory cells B. T cells C. plasma cells D. macrophages
Where does gas exchange between the air and the lungs occur?
A) lobar bronchi B) bronchioles C) trachea D) alveoli E) segmental bronchi