Modifiers that affect the force of contraction of the heart are _______.
A) chronotropic
B) inotropic
C) antagonists
D) agonists
Answer: B) inotropic
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The four elements that make up about 96% of body matter are ________.
A) carbon, oxygen, phosphorus, calcium B) nitrogen, hydrogen, calcium, sodium C) carbon, oxygen, hydrogen, nitrogen D) sodium, potassium, hydrogen, oxygen
An inflammatory response is triggered when _________.
A) mast cells release granules containing histamine and heparin. B) blood flow to an area increases. C) red blood cells release pyrogens. D) neutrophils phagocytize bacteria. E) T lymphocytes release interferon.
A human body cell normally has 46 autosomes
Indicate whether the statement is true or false
Which muscle decreases the volume of the thoracic cavity to promote expiration?
A. External intercostal B. Diaphragm C. External oblique D. Internal intercostal