The P wave of an electrocardiogram indicates
A. atrial depolarization.
B. threshold.
C. atrial repolarization.
D. ventricular depolarization.
E. ventricular repolarization.
Answer: A
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The phenotypes and genotypes that result from a cross of Aa and aa (A = normal pigmentation and a = albinism) are
A. phenotypes:all albino; genotypes:50% heterozygous and 50% homozygous recessive. B. phenotypes:all normal; genotypes:50% heterozygous and 50% homozygous recessive. C. phenotypes:all albino; genotypes:all homozygous recessive. D. phenotypes:50% normal and 50% albino; genotypes:50% heterozygous and 50% homozygous recessive.
Which respiratory-associated muscles would contract if you were to blow up a balloon?
A) External intercostals would contract, and the diaphragm would relax. B) Diaphragm would contract; external intercostals would relax. C) Internal intercostals and abdominal muscles would contract. D) None of the listed responses is correct.
The adductor (brevis, longus, and magnus), gracilis, and pectineus muscles all move the femur. They are in the
A. anterior group. B. posterior group. C. medial group. D. lateral group.
What moves lymph through lymph vessels?
A. The skeletal pump B. The valves within the lymph vessel C. The muscular layer of the lymph vessel D. None of these are correct.