Internal respiration is the exchange of gases between the blood and body cells.

a. true
b. false


Answer: a. true

Anatomy & Physiology

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The alveolar cell that secretes pulmonary surfactant is the

A.  alveolar type II cell. B.  alveolar type I cell. C.  alveolar macrophage. D.  dust cell. E.  squamous alveolar cell.

Anatomy & Physiology

The vessel that returns blood from the abdomen and legs to the heart is the __________ vena cava.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Memory B cells do NOT differentiate into plasma cells UNLESS they are __________.

a. stimulated by passive immunization b. exposed to the same antigen a second time c. stimulated by active immunization d. initially subjected to a specific antigen

Anatomy & Physiology

How many chromosomes do human primary oocytes contain?

a. 48 b. 46 c. 32 d. 24 e. 23

Anatomy & Physiology