Antigens that trigger allergic reactions are called

A) interferons.
B) microbes.
C) pyrogens.
D) allergens.
E) agglutinins.


D

Anatomy & Physiology

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________ cells constrict the afferent arterioles and secrete renin.

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

Anatomy & Physiology

Growth of the functional layer and prevention of menstruation during pregnancy are brought about by secretion of

A. human placental lactogen. B. human chorionic thyrotropin. C. progesterone. D. cortisol. E. relaxin.

Anatomy & Physiology

Which measurement would be most logical to describe the size of a cell?

A. 1–2 mm B. 10 um C. 2 cm D. 5–10 nm E. 1 dm

Anatomy & Physiology

Which of the following is not a part of the cardiovascular system?

a. heart b. blood vessels c. lymph vessels d. all of the above are part of the cardiovascular system

Anatomy & Physiology