Individuals who are described as heterozygous have different
A. genotypes than the predominant genotype.
B. genes for one trait on several chromosomes.
C. alleles for a particular trait.
D. parents who displayed two different phenotypes.
C
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The function of T tubules is to
A) bind actin and myosin molecules together. B) help distribute the electrical signal to contract throughout the muscle fiber. C) bind muscle fibers together at the neuromuscular synapse. D) separate one muscle fiber from another to facilitate partial contraction of a muscle. E) None of the answers are correct.
Compare dorsiflexion and plantar flexion
A) Dorsiflexion is movement toward the longitudinal axis of the body in the frontal plane. Plantar flexion is movement away from the longitudinal axis of the body in the frontal plane. B) Dorsiflexion is movement away from the longitudinal axis of the body in the frontal plane. Plantar flexion is movement toward the longitudinal axis of the body in the frontal plane. C) Dorsiflexion is upward movement of the foot or toes. Plantar flexion extends the ankle joint and bends the foot or toes down, as in standing on tiptoes. D) Dorsiflexion extends the ankle joint and bends the foot or toes down, as in standing on tiptoes. Plantar flexion is upward movement of the foot or toes. E) Dorsiflexion is moving the digits away from midline. Plantar flexion is moving the digits toward midline.
Which of the following does NOT describe hypertension? Hypertension
A. refers to a chronic state of elevated blood pressure. B. is usually defined as a systolic pressure greater than 140 mm Hg and a diastolic pressure greater than 90 mm Hg. C. is usually a result of chronically elevated cardiac output. D. may be caused by kidney disease. E. can sometimes be treated with drugs that increase excretion of water in the urine.
Intervertebral disks are composed of
A. reticular cartilage. B. elastic cartilage. C. fibrocartilage. D. hyaline cartilage.