Passive aging is
A. decay of tissues.
B. a result of a person being much less active in later years.
C. a buildup of structures and speeding of functions.
D. a breakdown of structures and slowing of functions.
Answer: D
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The buffer system in blood is formed by
A) the chloride shift through the cell membranes. B) deoxyhemoglobin generated in white blood cells. C) hemoglobin binding hydrogen ions in red blood cells. D) phosphate buffer in the renal system.
These nervous system cells are highly specialized to transmit messages throughout the body
A) astrocytes B) microglial cells C) oligodendrocytes D) neurons
Which of the following hormones stimulates skeletal muscle fibers to take in glucose from the blood?
A) calcitonin B) cortisol C) insulin D) glucagon E) parathyroid hormone
After centrifuging, blood fractionates into plasma, the buffy coat, and RBCs. What is found in the buffy coat?
A) immunoglobulins, albumin, fibrinogen, and other plasma proteins B) WBCs (leukocytes) and platelets C) dissolved electrolytes,nutrients, hormones, gases, and wastes D) all types of formed elements