Which of the following would slow down gas exchange between the blood and alveolar air?
A. An increase in membrane thickness
B. An increase in alveolar surface area
C. An increase in respiratory rate
D. A decrease in membrane thickness
E. A decrease in nitrogen solubility
A. An increase in membrane thickness
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You examine a sample of muscle tissue under the microscope, and it has a striped, or striated appearance. This sample could not have been taken from the ________.
A. wall of digestive tract B. muscle of the thigh C. wall of heart chamber D. muscle of the forearm
Explain the function of sodium-potassium ion pumps
A) They generate ATP for the cell during the electron transport chain when hydrogen ions move in a process known as chemiosmosis. B) The sodium-potassium ion pump binds acetylcholine across the synaptic cleft to generate an action potential at the sarcolemma. C) The sodium-potassium ion pump allows facilitated diffusion of potassium during the repolarization of a muscle cell. D) The sodium-potassium ion pump allows facilitated diffusion of sodium during the depolarization of a muscle cell. E) The sodium-potassium ion pump maintains the resting membrane potential of a cell by exporting three sodium ions out in exchange for two potassium ions entering the cell.
Which of the following is advised treatment for gout?
a. weight loss; avoid foods high in nucleic acids; avoid alcohol; take ibuprofen b. exercise; cold packs; large doses of aspirin; immunosuppressant drugs c. aspirin; moderate activity; hot pepper extract; glucosamine sulfate d. All of these are advised treatments for gout.
The bones of the forearm include the radius and the .