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

Anatomy & Physiology

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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

Anatomy & Physiology

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

Anatomy & Physiology

Glomerular filtration produces about 18 liters of fluid in twenty-four hours.

Answer the following statement true (T) or false (F)

Anatomy & Physiology

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.

Anatomy & Physiology