Of the following muscles of the thigh, which one is NOT part of the quadriceps group?
A. biceps femoris
B. rectus femoris
C. vastus lateralis
D. vastus medialis
E. vastus intermedius
A
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Which correctly describes the cause of the increase in alveolar ventilation that occurs when a person ascends to high altitude?
A. The decrease in PCO2 of inspired air decreases alveolar PCO2, stimulating the central chemoreceptors. B. The decrease in total atmospheric pressure causes a greater negative pressure in the intrapleural space, resulting in deeper and more frequent breathing. C. The decrease in PCO2 of inspired air decreases alveolar PCO2, stimulating the peripheral chemoreceptors. D. The decrease in PO2 of inspired air decreases alveolar and arterial PO2, stimulating the peripheral chemoreceptors. E. The decrease in the total barometric pressure at high altitude causes hypocapnea, which stimulates peripheral chemoreceptors.
The intercalated discs in cardiac muscle tissue ________
A) attach cardiac muscle cells to the fibrous skeleton of the heart B) mark the junction between two cardiac cells C) are responsible for the banding pattern, or striations, of the tissue D) are responsible for the banding pattern, or striations, of the tissue, mark the junction between two cardiac cells, and attach cardiac muscle cells to the fibrous skeleton of the heart
A polar body biopsy is a type of
A. amniocentesis in which polar bodies are sampled from fluids surrounding the fetus. B. gene therapy in which a polar body is inserted into a zygote. C. chorionic villi sampling (CVS) in which villi of the polar body are tested. D. preimplantation genetic study in which a polar body is tested for genetic disorders.
Which of the following is an example of an isometric contraction?
A) shaking the head as to say "no" B) pushing against an immovable wall C) bending the elbow D) rotating the arm E) nodding the head as to say "yes"