The cells in this layer of epidermis are dead, and their flat, scale-like remnants are filled with keratin
A) stratum granulosum B) stratum spinosum
C) stratum corneum D) stratum basale
Answer: C
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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 peripheral chemoreceptors. B. The decrease in PCO2 of inspired air decreases alveolar PCO2, stimulating the central chemoreceptors. C. The decrease in PO2 of inspired air decreases alveolar and arterial PO2, stimulating the peripheral chemoreceptors. D. The decrease in total atmospheric pressure causes a greater negative pressure in the intrapleural space, resulting in deeper and more frequent breathing. E. The decrease in the total barometric pressure at high altitude causes hypocapnea, which stimulates peripheral chemoreceptors.
What determines breast size?
A. The amount of collagenous fiber B. The amount of mammary gland tissue C. Muscle tone D. The size of lactiferous sinuses E. The amount of adipose tissue
All of the following occur at puberty except
A) FSH levels rise. B) GnRH levels decline. C) levels of sex hormones rise. D) skeletal muscle fibers are stimulated. E) secondary sexual characteristics begin to develop.
What is hCG and what is its significance?
What will be an ideal response?