Select the fundamental units of chromatin.
A)nucleosomes
B)chromosomes
C)DNA linker segments
D)histones
A)nucleosomes
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Why does muscle activity affect the temperature of the body?
A. The rate of chemical reactions increases in muscle fibers during contraction, so the rate of heat production also increases. B. Muscle contraction generates pyrogens which reset the body's internal thermostat to a higher temperature. C. Muscle activity directs more warm blood to the muscles away from the central core causing a cooling effect on your internal organs. D. Increased muscle activity causes a rise in adipose stores which increases the insulation value of the body.
Intracellular fluids have high concentrations of
A. sodium and phosphate ions. B. potassium and phosphate ions. C. sodium and chloride ions. D. chloride and potassium ions.
An important component of the lamina propria in the upper respiratory system is
A) sweat glands. B) ceruminous glands. C) mucus glands. D) serous glands. E) smooth muscle cells.
True or False? Increased blood flow to alveoli is a common factor that disrupts normal ventilation-perfusion coupling.
Answer the following statement true (T) or false (F)