Adaptive immunity involves skin, NK cells, and phagocytosis.
Answer the following statement true (T) or false (F)
True
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Some women prolong breastfeeding or lactation in general as a form of birth control. How would extension of lactation be effective in preventing pregnancy?
A. Lactation stimulates production of placental lactinogen, which is a pregnancy hormone and prevents the corpus luteum from degrading and advancing the reproductive cycle. B. The physical stimulation of breastfeeding causes high levels of progesterone to be produced, which cause secretions in the reproductive tract that are hostile to sperm. C. Prolactin is the hormone that corresponds with lactation. It also inhibits ovulation at the pituitary gland level, so as long as lactation is actively occurring, ovulation is prevented. D. Breastfeeding stimulates production of oxytocin, which causes the endometrium to slough off and exit the body in a menstrual period, preventing implantation of a zygote.
Disaccharides are a type of lipid
Indicate whether the statement is true or false.
Aldosterone exerts effects on principal cells of the kidney by causing
A. increased levels of cAMP and increases in the total number of Na+ channels. B. decreased levels of cAMP and decreases in the number of open K+ channels. C. increased numbers of Na+/K+ pumps. D. decreased numbers of Na+/K+ pumps.
What occurs during hyperpolarization of a neuron plasma membrane?
A. Potassium ions are leaving the cell. B. Sodium ions are entering the cells. C. Both sodium and potassium ions are leaving the cell. D. Sodium ions are leaving the cell. E. Potassium ions are entering the cell.