Explain the meaning of the muscle name extensor carpi ulnaris
What will be an ideal response?
The term extensor indicates this muscle increases the angle between bones through extension. Both carpi and ulnaris indicate a specific body region. Carpi indicates the wrist region while ulnaris indicates one of the bones of the forearm.
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Nerve tracts or fasciculi make up the
A) central canal. B) posterior gray horns. C) gray commissures. D) white columns. E) anterior gray horns.
Oxidative deamination takes place in the ________.
A) liver B) muscles C) kidneys D) blood
Why doesn't the stomach digest itself?
A. Stem cells in gastric glands constantly replace dead epithelial cells of the mucosa. B. Mucosal epithelial cells are exceptionally long-lived. C. Parietal cells secrete a thick mucus that protects the mucosa. D. Excess stomach acid is regurgitated. E. Gastrin stimulates production of mucus.
Which are functions of melanin? Choose all that apply.
A. It is responsible for most of skin color. B. It acts as a vitamin, helping with calcium absorption. C. It acts as a shield, absorbing UV rays. D. It is secreted onto the surface of the skin.