The heart must be stimulated by the nervous system to contract.
Answer the following statement true (T) or false (F)
False
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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.
Define peristalsis
What will be an ideal response?
Exchange of nutrients and other substances between CNS neurons and blood vessels is accomplished by
A. oligodendrocytes. B. satellite cells. C. astrocytes. D. Schwann cells. E. microglia.
The process of white blood cell production and maturation goes on in all of the following except
A) the spleen. B) the kidney. C) the lymph nodes. D) red bone marrow. E) the thymus.