Which of the following factors would produce the greatest change in blood flow?
a. doubling the radius of the vessel.
b. doubling the difference in the pressure gradient within the vessel.
c. doubling the viscosity of the blood.
d. doubling the length of the vessel.
e. halving the viscosity of the blood.
A
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The follicular phase of the ovarian cycle is characterized by
A. formation of the corpus luteum. B. high progesterone levels. C. maturation of and secretion by uterine glands. D. ovulation. E. rapid development of ovarian follicles.
Which layer of the epidermis is the deepest?
A) Stratum granulosum B) Stratum basale C) Stratum corneum D) Stratum spinosum
The muscle that extends the great toe is the
A. extensor digitorum longus. B. tibialis anterior. C. gracilis. D. fibularis brevis. E. extensor hallucis longus.
Which embryonic tissue gives rise to the epidermis?
A. Ectoderm B. Mesoderm C. Mesenchyme D. Endoderm E. Squamous epithelium