The ________ valve prevents backward flow into the left atrium
A) semicaval
B) semilunar
C) bicuspid
D) tricuspid
E) pulmonic
C
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Following severe loss of blood, the resultant reduction in circulating blood volume leads to an increase in venous return and stroke volume, a subsequent fall in cardiac output, and a rise in mean arterial blood pressure
a. True b. False Indicate whether the statement is true or false
With increasing age, the baroreflex becomes less efficient. This may result in which of the following?
A. Slower adaptation to changing light intensities B. Increased constipation C. Difficulty regulating blood pressure D. Frequent eye infections
The depth of tactile corpuscles corresponds to their function in that ________
A) given their localization in the papillary layer of the dermis, tactile corpuscles are appropriately situated to mediate the response to fine or light touch B) given their localization in the reticular layer of the dermis, tactile corpuscles are appropriately situated to mediate the response to fine or light touch C) given their localization in the papillary layer of the dermis, tactile corpuscles are appropriately situated to mediate the response to deep pressure sensations D) given their localization in the hypodermis, tactile corpuscles are appropriately situated to mediate the response to fine or light touch
During forced exhalation, _______.
A. the internal intercostals contract B. the diaphragm contracts C. the diaphragm, the internal intercostals and the external intercostals contract D. the external intercostals contra