The portion of a hair that protrudes above the surface of the skin is the

A. hair root.
B. hair follicle.
C. hair shaft.
D. hair bulb.
E. dermal papilla.


C

Anatomy & Physiology

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The effects of aging on the brain begin at about ________ of age.

A. 30 years B. 50 years C. 40 years D. 20 years E. 60 years

Anatomy & Physiology

Capillaries that have a complete lining are called

A) continuous capillaries. B) fenestrated capillaries. C) sinusoidal capillaries. D) sinusoids. E) vasa vasorum.

Anatomy & Physiology

Lack of sunlight will directly affect the formation of vitamin D. This implies that the specific cell type required for vitamin D synthesis using sunlight energy is the ___________.

a) keratinocyte b) chondroblast c) intestinal epithelial cell d) osteocyte

Anatomy & Physiology

Which of the following statements concerning blood vessel walls is true?

A. The tunica adventitia is composed of smooth muscle and endothelium. B. Capillaries have both a tunica intima and a tunica media. C. The tunica intima is the innermost layer of a blood vessel wall. D. The tunica media is found in all blood vessels except veins. E. Vessel diameter is controlled primarily by the tunica intima.

Anatomy & Physiology