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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Newborns can acquire __________ immunity through breast milk
A) innate B) active C) passive D) specific
Cosmetics, laundry products, plants, jewelry, paints, drugs, and plastics are common causes of ___________
Fill in the blank(s) with the appropriate word(s).
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.
________ release antibodies to destroy cells that carry non-self-antigens.
A. Mast cells B. B lymphocytes C. T lymphocytes D. Natural killer cells