Which of the following examples listed below illustrates homeostasis maintained by a negative feedback?
A) Production of vitamin D initiated by the suns UV light striking the skin.
B) Formation of cerumen wax to deter insects from entering the ear.
C) Changes in the response of the hair follicle to dihydrotestosterone (DHT).
D) Thickening of epidermis to form a callus in places where the skin is exposed to friction.
D
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In addition to the synthesis of vitamin D, keratinocytes are able to carry out some other biologically important functions. Name at least two of these other functions.
What will be an ideal response?
Which aspect of gastric motility is associated with receptive relaxation?
a. gastric filling b. gastric storage c. gastric mixing d. gastric emptying
Which of the following cranial nerves is NOT associated with eye muscle movement?
A. Trochlear B. Optic C. Abducens D. Oculomotor E. All of these are associated with eye muscle movement
This division of the ANS increases both the rate and force of contraction of the heart
A) sympathetic B) parasympathetic C) both sympathetic and parasympathetic