Parasympathetic stimulation slows the rate of depolarization of the SA node and thus decreases the heart rate
Indicate whether the statement is true or false
T
You might also like to view...
Platelets are normally attracted to a
a. collection of white blood cells. b. disrupted surface of a blood vessel. c. smooth surface. d. source of ATP production. e. surface where the blood meets the air.
Cytotoxic T-lymphocytes that have killed a foreign cell may transform into
A. helper T-lymphocytes. B. memory B-lymphocytes. C. plasma cells. D. natural killer cells. E. None of the choices is correct.
Answer the following questions true (T) or false (F)
1. The sympathetic nervous system increases cardiac output by increasing both heart rate and stroke volume. 2. The sinoatrial (SA) node fires more rapidly at higher body temperatures, increasing cardiac output. 3. When studying, you should actively read the textbook by taking notes and making diagrams.
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