What keeps the bolus from entering the larynx during deglutition?
A. the epiglottis
B. the uvula
C. the tongue
D. the upper esophageal sphincter
A
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Blood flow through a capillary is controlled by a precapillary sphincter, which opens or closes due to the requirements of the cells supplied by the capillary.
Answer the following statement true (T) or false (F)
The factor favoring filtrate formation at the glomerulus is the ________.
A) colloid osmotic pressure of the blood B) glomerular hydrostatic pressure C) capsular hydrostatic pressure D) myogenic mechanism
When does the heart begin to beat?
A. At birth B. By week 5 in the embryo C. Early in fetal development D. By week 3 in the embryo E. By the fifth month of development
A severely dehydrated patient begins to experience the formation of random blood clots. Why is this happening?
A. Dehydration leads to a concentration of clotting factors which triggers the extrinsic mechanism of coagulation B. Dehydration stimulates vasospasms which in turn lead to clot formation C. Dehydration collapses the capillaries and exposes collagen which triggers the extrinsic mechanism of coagulation D. Dehydration leads to a concentration of clotting factors which triggers the intrinsic mechanism of coagulation