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
Answer: A
You might also like to view...
Which type of descending motor pathway originates in the brainstem and governs automatic movements that help regulate muscle tone, posture and balance?
a) Indirect pathway b) Direct pathway c) Reflex arc d) Somatic arc e) Muscle spindles
Apoptosis has been implicated in a great number of disease states. Which of the following is probably not a consequence of errors in apoptosis?
A)A cell population that is triggered to undergo apoptosis would be diminished. An example is that HIV signals apoptosis in an important immune cell called the T helper cell. The reduction in T helper cells leads to the diminished immunity in Acquire Immunodeficincy Disease (AIDS). B)Failure of apoptosis in menstruating women could lead to cells that persist beyond their normal monthly cycle. A condition similar to this would be endometriosis. C)Excessive apoptosis would lead to cancerous growth of cells. An example is the inhibition of tumor suppressor genes like p53. D)Removing the tissue between fingers and toes during development relies on apoptosis. Thus, failure of apoptosis could lead to webbed toes.
What is a good strategy for class or laboratory preparation?
A) Only read after you have attended class or laboratory. B) Avoid reading before class as you may get confused. C) Focus on reading your materials on the weekends when you have hours to spend. D) Read and prepare notes before attending your class or laboratory.
In short-term memory,
A. information is retained for less than a second. B. the frontal lobe plays the most important role. C. current information is lost when new information is presented. D. there is increased synaptic activity by long-term potentiation. E. there is consolidation of information.