HIV, the virus that causes AIDS, was discovered in the early 1980s. Because it is a relatively new virus, there are many myths and misunderstandings that surround this virus.
a. true
b. false
Answer: a. true
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A group of rats are bred in a laboratory to study muscle function. This group possesses a genetic defect that causes troponin to be incorrectly synthesized, making it non-functional. Because of this, the rats are entirely paralyzed. Which of the following correctly explains the impact of the defect on the muscle?
A. Troponin, when revealed by tropomyosin, won't be able to bind to the myosin heads of the thick filament. B. Troponin won't pull away to reveal the actin binding spots of the thin filament after tropomyosin binds Ca+2. C. Troponin, when revealed by actin, won't be able to bind to the myosin heads of the thick filament. D. Troponin can't bind Ca+2, which stops tropomyosin from pulling away to reveal actin binding spots on the thin filament.
A renal clearance test determines the rate at which the kidneys can
A) remove a particular substance from the blood. B) excrete water. C) reabsorb ions. D) add a substance to the blood.
Answer the following statements true (T) or false (F)
1. LH stimulates the development of several immature ovarian follicles and is responsible for the release of estrogen. 2. Although LH is called the ovulation hormone, without FSH there would be nothing to ovulate. 3. Creatures that do not produce gametes are said to reproduce asexually. 4. Both the ovum and sperm are considered gametes. 5. One of the differences between sexual and asexual reproduction is the number of parents that an offspring has.
X-rays of the mandible and maxillae of an average 4-year-old child would capture the image of ________ teeth
A) 18 B) 20 C) 26 D) 32 E) 52