Fluid that collects in tissues is returned to the bloodstream by the
A. lymphatic system.
B. digestive system.
C. excretory system.
D. endocrine system.
E. vascular system.
Answer: A
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Which statement is true?
a. Blood flows from areas of high hydrostatic pressure in the arterioles to low hydrostatic pressure in the arteries. b. Blood flows from areas of low hydrostatic pressure in the arterioles to high hydrostatic pressure in the arteries. c. Blood flows from areas of high hydrostatic pressure in the arteries to low hydrostatic pressure in the arterioles. d. Blood flows from areas of low hydrostatic pressure in the arteries to high hydrostatic pressure in the arterioles.
The control over milk "let down," labor in childbirth, and water balance are mediated by the ____
gland. a. pineal b. anterior pituitary c. posterior pituitary d. parathyroid e. thyroid
What is the greatest risk factor for cancer?
a. family history b. age c. environmental toxins d. diet e. physical inactivity
_________ speciation results when a population of a species is geographically isolated.
Fill in the blank(s) with the appropriate word(s).