List and define the three most important factors that affect stroke volume
What will be an ideal response
1. Preload ? the degree to which heart muscle cells are stretched before they contract
2. Contractility ? contractile strength achieved at a given muscle length
3. Afterload ? pressure that must be overcome for the ventricles to eject blood
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________ release antibodies to destroy cells that carry non-self-antigens.
A. Mast cells B. B lymphocytes C. T lymphocytes D. Natural killer cells
Newborns can acquire __________ immunity through breast milk
A) innate B) active C) passive D) specific
Testosterone
a. is responsible for the male secondary sexual characteristics. b. stimulates spermatogenesis. c. acts in negative-feedback fashion on the anterior pituitary and hypothalamus. d. secretion is stimulated by LH. e. all of these answers.
Cosmetics, laundry products, plants, jewelry, paints, drugs, and plastics are common causes of ___________
Fill in the blank(s) with the appropriate word(s).