The function of melanin in the skin is to
A. reduce water loss.
B. prevent infections.
C. help regulate body temperature.
D. protect against UV light.
E. keep the epidermis soft and pliable.
D
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Blood flow through the kidney includes a feature seen in only a few organs. What is it?
A) arterial shunts B) portal system C) veins containing highly oxygenated blood D) vascular sinuses E) anastomoses
What is the lower esophageal sphincter called?
a. pharyngoesophageal sphincter b. gastric sphincter c. oropharyngeal sphincter d. gastroesophageal sphincter e. peristaltic sphincter
This pair of muscles includes the prime mover of inspiration, and its synergist
A) external intercostals and internal intercostals B) sternocleidomastoid and external intercostals C) pectoralis minor and internal intercostals D) diaphragm and external intercostals
At puberty, the hypothalamus becomes more sensitive to feedback inhibition by testosterone
Indicate whether the statement is true or false