Nodding the head is permitted by a joint between which two bones?
A. Atlas and axis
B. Axis and C3
C. Atlas and occipital bone
D. C3 and C4
E. Sternum and clavicle
C. Atlas and occipital bone
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In the figure showing the veins of the lower extremity, what veins are indicated by number 5?
A. Great saphenous veins B. Fibular veins C. Anterior tibial veins D. Small saphenous veins E. Popliteal veins
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.
Ventral roots of spinal nerves are purely or primarily ________
A) mixed sensory and motor B) sensory C) motor
172. Lymphocytes with a CD8 glycoprotein on their surface are called ______ cells and lymphocytes with a CD4 glycoprotein on their surface are called ______ cells
A. cytotoxic T; B B. B; cytotoxic T C. B; helper T D. helper T; cytotoxic T E. cytotoxic T; helper