In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?

A. A ruptured aneurysm in a vein
B. An aneurysm or weak point in a vein
C. Failure of the lymphatic valves
D. An aneurysm or weak point in an artery
E. Failure of the venous valves


Answer: E

Anatomy & Physiology

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A) channel B) receptor C) active D) motor E) ion

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Activation energy is

A) required to convert an endergonic reaction to an exergonic reaction. B) the energy required for an endergonic reaction. C) the energy lost or gained in a reaction. D) the energy required to bring molecules into a position where they can interact.

Anatomy & Physiology

The renal function is approximately what percent of the cardiac output?

a) 21 b) 1 c) 5 d) 83

Anatomy & Physiology

The type of connective tissue fiber that stretches is reticular fibers.

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

Anatomy & Physiology