The primary reproductive organs, or __________, consist of a pair of __________ in the male and a pair of ovaries in the female
Fill in the blank(s) with correct word
gonads; testes
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Osteoporosis is most common in elderly women due to their lack of what?
A. Estrogen B. Osteoclast activity C. Parathyroid hormone D. Dietary calcium E. Vigorous exercise
Nutrients are delivered and waste products are carried away from the cells of the posterior segment of the eye by blood vessels. However, the cells in the cornea and lens (in the anterior segment) are avascular
Which is the best explanation for how these cells are maintained? A) The nutrients and waste products of the anterior segment diffuse into and through the vitreous humor of the posterior segment. B) The metabolic activity of these cells is very low. They produce little waste and need few nutrients. C) These cells, like the cells of the corneal layer of the integument are not living cells. D) The aqueous humor is continuously replenished and flows from the ciliary process to drain in the scleral venous sinus.
A disease that affects the production of collagen found in gomphoses would lead to:
a) the inability of teeth to withstand the pressure of chewing. b) the skull being unsuitable to protect the brain. c) the long bones to cease in growing. d) the vertebrae compressing and not being able to resist tension.
An erection is the result of parasympathetic innervation, and ejaculation is the result of sympathetic innervation.
Answer the following statement true (T) or false (F)