When the heart is in fibrillation,
A) the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells.
B) effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen.
C) there is no contraction of the myocardium.
D) the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute.
E) the myocardial cells may become damaged from contracting too fast.
B) effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen.
You might also like to view...
The fat-soluble vitamins include
A. vitamin C. B. A, E, C, and the B vitamins. C. vitamins A, D, and K. D. the B-complex vitamins.
Endurance training results in ________
A) An increase in blood vessels to a muscle B) Muscle hypertrophy C) Muscle atrophy D) An increase in muscle fibers
Match the type of cell with its function.A. First cell to enter infected tissueB. Will become macrophage in tissueC. Lyses tumor and virus-infected cellsD. Cell that increases in number during a parasitic infectionE. Nonmotile cells in connective tissue that promote inflammationMast cell
Fill in the blank(s) with the appropriate word(s).
Which hormone is alternately known as vasopressin due to its effect on blood pressure by causing constriction of arterioles (small arteries)?
A) oxytocin B) antidiuretic hormone (ADH) C) thyroid-stimulating hormone (TSH) D) growth hormone (GH) E) luteinizing hormone (LH)