Follicle stimulating hormone acts directly on which cells in males?

a. follicle cells
b. seminiferous tubule cells
c. Sertoli cells
d. Leydig cells


c. Sertoli cells

Biology & Microbiology

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Which muscle group is composed of mainly slow-twitch (type I) fibers?

A. Deltoid muscle of the shoulder B. Rectus muscles that move the eye C. Erector spinae muscles of the back D. Small muscles of the hand

Biology & Microbiology

A planula is a ________

a. motile ciliated larva that will settle and grow into a polyp b. reproductive polyp on a colonial hydroid c. barbed thread of a nematocyst d. male medusa

Biology & Microbiology

Which of the following does NOT produce an exotoxin?

a. Bordetella pertussis b. Corynebacterium diphtheriae c. Mycobacterium tuberculosis d. Streptococcus pygogenes e. All of these produce an exotoxin.

Biology & Microbiology

The normal flora of the skin is predominantly gram-negative rods

Indicate whether the statement is true or false

Biology & Microbiology