Which characteristic of the plasma membrane is responsible for maintaining the difference between intracellular and extracellular fluid?
A. Presence of channels in the membrane
B. High Na+ concentration inside the cell
C. Being selectively permeable
D. Presence of lipids in the membrane
Answer: C
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The juxtaglomerular apparatus regulates the filtration rate by ________.
A. renin-angiotensin II vasoconstricting both the afferent and efferent arterioles B. vasoconstriction of the peritubular capillaries C. increasing osmotic pressure in the glomerular capsule D. vasodilation of the peritubular capillaries
Glomerular filtration produces about 18 liters of fluid in twenty-four hours.
Answer the following statement true (T) or false (F)
The physical movement of air into and out of the lungs is called
A) gas transport. B) cellular respiration. C) internal respiration. D) pulmonary ventilation. E) external respiration.
Triads in skeletal muscle consist of which of the following?
A) sarcoplasm, sarcoplasmic reticulum, calcium ions B) sarcoplasmic reticulum, terminal cisterna, sarcoplasm C) two terminal cisternae and a T-tubule D) two T-tubules and one terminal cisterna