Eyebrow hairs are always shorter than hairs on your head because ________.
A) they grow much slower
B) eyebrow follicles are only active for a few months
C) the vascular supply of the eyebrow follicle is one-tenth that of the head hair follicle
D) hormones in the eyebrow follicle switch the growth off after it has reached a predetermined length
B) eyebrow follicles are only active for a few months
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The only cells of the testis that can secrete hormones are the Leydig cells.
Answer the following statement true (T) or false (F)
This layer is composed of a high concentration of collagen fibers.
A) stratum corneum B) stratum granulosum C) dermis D) hypodermis E) cornified region
________ hormone targets the kidney and promotes retention of urine.
Fill in the blank(s) with the appropriate word(s).
The ________ performs the work of the heart.
A. pericardial cavity B. endocardium C. epicardium D. myocardium E. fibrous skeleton