In the lever where the biceps brachii flexes the elbow, what is the effort?
A. The insertion of the muscle on the radius
B. The elbow joint
C. The radius
D. The hand
Answer: A
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If the ATP-generating mechanisms in a cell are poisoned and the cell depletes its ATP reserves, which would occur first?
A. Facilitated diffusion of molecules would cease. B. Ion concentration gradients would reach equilibrium across the cell membrane. C. All transport processes would cease immediately when the ATP was depleted. D. Primary active transport of molecules would cease. E. Secondary active transport of molecules would cease.
Which of the following is the most common cause of metabolic alkalosis?
a) Hemorrhage b) Vomiting c) Pneumothroax d) Diabetes e) Cancer
What structures keep the AV valves from everting under high ventricular pressure?
A. Papillary muscles and chordae tendineae B. Interventricular and interatrial septa C. Annuli fibrosis D. Semilunar valves
The main collecting duct of the lymphatic system is the ____ duct
a. lumbar b. thoracic c. cervical d. sacral