Which is TRUE about the Na+, K+ ATPase pump in neurons?
A. It generates a small electrical potential such that the inside is made negative with respect to the outside.
B. It maintains a concentration gradient for K+ such that diffusion forces favor movement of K+ into the cell.
C. It maintains an electrical gradient at the equilibrium potential of K+.
D. It transports equal numbers of sodium and potassium ions with each pump cycle.
E. It pumps 3 Na+ ions into the cell for every 2 K+ ions it pumps out.
A
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Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
A. Skeletal muscle B. Smooth muscle C. Cardiac muscle D. Skeletal and smooth muscle E. Smooth and cardiac muscle
Dural venous sinuses are areas where
A. the meningeal and periosteal layers separate to form large blood-filled spaces. B. cerebrospinal fluid is produced. C. cerebrospinal fluid is stored. D. large numbers of nuclei congregate. E. glial cells are formed.
Describe the drainage of the right lymphatic duct and the thoracic duct
A) The right lymphatic duct collects lymph from the right side of the body. The thoracic duct collects lymph from the left side of the body. B) The right lymphatic duct collects lymph from the body inferior to the diaphragm. The thoracic duct collects lymph from the body superior to the diaphragm. C) The right lymphatic duct collects lymph from the entire body except the head and neck. The thoracic duct collects lymph from the head and neck. D) The right lymphatic duct collects lymph from the right side of the body superior to the diaphragm. The thoracic duct collects lymph from the body inferior to the diaphragm and the left side superior to the diaphragm. E) The right lymphatic duct collects lymph from the limbs of the body. The thoracic duct collects lymph from the trunk of the body.
Which malignancy originates in the lamina propria of the bronchi?
A) Adenocarcinoma B) Cor pulmonale C) Pulmonary edema D) Oat-cell carcinoma E) Squamous-cell carcinoma