Bone-building cells are called ________.
A. osteoblasts
B. osteoclasts
C. osteocytes
D. hemopoietics
Answer: A
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The release of norepinephrine and epinephrine into the bloodstream increases all of the following EXCEPT ________.
A. respiration B. salivation C. pulse or heart rate D. blood pressure
The nervous system
A) all of the above. B) detects changes in the internal or external environment. C) controls the movement of muscles. D) integrates information from several sources and uses it to determine an appropriate response.
Endocrine glands secrete _____ into the bloodstream, where they travel to specific sites called ____.
Fill in the blank(s) with the appropriate word(s).
What is the role of serotonin in blood clotting?
A. Causes platelets to become sticky B. Causes vasoconstriction of blood vessels to slow loss of blood C. Converts fibrinogen to fibrin D. Enhances the platelet release reaction