Which of the following statements about reflex actions is true?
a. Reflex actions regulate breathing.
b. Some reflex actions are unpredictable and may require conscious thought.
c. When you withdraw your hand from a hot stove, the feeling of pain is part of the reflex
response.
d. Awareness of the heat of fire must occur before a withdrawal reflex can take place.
e. Reflex actions involve five types of neurons
A
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Indifferent gonads develop
A) during the first two weeks of prenatal development. B) during the fifth week of prenatal development. C) during the ninth week of prenatal development. D) when the embryo becomes a fetus.
During the conversion of 1,3-bisphosphoglycerate to 3-phosphoglycerate and phosphoenolpyruvate, a phosphate group is added to ATP to generate ATP. The mechanism for ATP production in this reaction is
A) substrate-level phosphorylation. B) product-level phosphorylation. C) oxidative phosphorylation. D) anabolic phosphorylation. E) aerobic phosphorylation.
Which major type of muscle in humans has a primary function in movement?
A) smooth B) cardiac C) skeletal D) endothelial
A patient had a severe hemorrhage, which has been stopped. The initial hematocrit test is normal. What would you predict for the hematocrit test taken the next day?
A. It will likely be higher, since homeostatic mechanisms will increase levels of erythrocytes. B. It will continue to be normal, since the hemorrhage wasn't severe enough to affect the initial test. C. It will gradually increase as the blood volume is restored. D. It will likely be lower, since blood volume should increase, but erythrocytes take longer to be produced.