Which of the following is not true of monocytes?
A. They are classified as granulocytes.
B. They are the largest blood cells in the circulating blood.
C. They are phagocytes, which engulf and destroy microorganisms and dead cells.
D. They make up 3-9% of the white blood cells.
E. All of these are true of monocytes.
Answer: A
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The ventricles of the brain communicate with
A. the central canal of the spinal cord. B. the subarachnoid space. C. each other. D. All of the above
Which reaction involving CO2 predominates within erythrocytes in the pulmonary capillaries of the lung?
A. HCO-3 combines with H+ to form H2CO3, which dissociates into CO2 and H2O. B. HCO-3 dissociates into H+, CO, and O2. C. CO2 combines with H+ to form HCO2. D. CO2 combines with water to form bicarbonate ion and carbonic acid.
Hyperparathyroidism, which is usually caused by a hypersecreting tumor in one of the parathyroid glands, is characterized by hypocalcemia and hyperphosphatemia
a. True b. False Indicate whether the statement is true or false
A goiter is
a. an enlarged thyroid b. always the result of hypothyroidism c. present only with iodine-deficient diets d. only present when TSH levels are elevated e. both a and d