Which is not an action of interferon?
A. It stimulates macrophages and NK cells to destroy virus-infected cells.
B. It triggers synthesis of enzymes that destroy viral nucleic acids.
C. It signals the immune system that the secreting cell is part of the body and so should not be attacked.
D. It binds to receptors of neighboring cells preventing them from being infected.
C
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Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells
Indicate whether this statement is true or false.
Which chemicals are primarily responsible for initiating contractions of true labor?
A) prolactin B) progesterone C) relaxin and inhibin D) estrogens and oxytocin stimulate the production of prostaglandins E) LH and oxytocin
The subscapular fossa is a depression on the anterior surface of the scapula.
Answer the following statement true (T) or false (F)
The three masses of erectile tissue that compose the body of the penis are __________.
a. two slender corpora spongiosa and a cylindrical corpus cavernosum b. two corpora cavernosa and preputial gland c. two cylindrical corpora cavernosa and a slender corpus spongiosum d. periputial glands, a corpus cavernosum, and a corpus spongiosum