Heart Block is one type of electrical defect in the heart in which the electrical signal from the sinoatrial node to the relay point is delayed. Predict the effect of Heart Block on the cardiac cycle
A) The atria relax for a shorter period of time.
B) The atria relax for a longer period of time.
C) The ventricles relax for a shorter period of time.
D) The ventricles relax for a longer period of time.
D
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A unique feature of ________ is that they are tissue specific.
Fill in the blank(s) with the appropriate word(s).
A previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in?
A. Platyhelminthes. B. Mollusca. C. Arthropoda. D. Cnidaria.
An early sign of plaque formation in coronary arteries is
a. a heart attack. b. hypertension. c. hypotension. d. angina pectoris. e. rapid heart beat.
A gene that specifies the fate of a particular anatomical segment in Drosophila is called a(n) ________
Fill in the blank(s) with correct word