An enlarged R wave on an ECG would indicate
a. a myocardial infarction.
b. an enlarged ventricle.
c. cardiac ischemia.
d. repolarization abnormalities.
Answer: b. an enlarged ventricle.
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When calcium becomes available inside a cell, it comes from
A) intracellular storage only. B) extracellular fluid and intracellular storage. C) extracellular fluid only. D) It is always available as a major cytosol cation.
Basophils release ________, a vasodilator that increases blood flow to damaged tissues.
Fill in the blank(s) with the appropriate word(s).
This component of the male duct system carries sperm from outside the body into the abdominal cavity
A) ductus deferens B) ejaculatory duct C) urethra D) epididymis
Expiration (exhalation) occurs when ________
A) the diaphragm and intercostal muscles contract B) air moves into the lungs C) intrapulmonary volume increases D) the diaphragm and intercostal muscles relax E) intrapulmonary pressure decreases