The pineal gland secretes the hormone
a. melatonin.
b. melanin.
c. melanocyte stimulating hormone.
d. estradiol.
e. melanopsin.
A
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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
Melanocyte-stimulating hormone, which regulates the formation of melanin, is produced by the
A. pineal gland. B. the hypothalamus. C. anterior lobe of the pituitary gland. D. intermediate lobe of the pituitary gland.
During the process of bone formation,
A) Osteoclasts secrete collagen fibers. B) Collagen fibers help organize the deposition of calcium phosphate apatite. C) Osteoblasts secrete hydrolytic enzymes creating tunnels into the bone or cartilage. D) Osteocytes ultimately mature into inactive osteoclasts.
Helicobacter pylori is a bacterium associated with ________.
A. hiatal hernia B. acid reflux C. peptic ulcers D. pancreatitis