The axons of the parasympathetic postganglionic neurons secrete ________.
A. epinephrine
B. acetylcholine
C. acetylcholine or epinephrine
D. norepinephrine
E. acetylcholine or norepinephrine
Answer: B
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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.
Neurons have
A) a cell body and collagen fibers. B) connective tissue membranes surrounding them. C) striations and intercalated discs within their cell body. D) cilia along their cell membranes. E) a cell body, dendrites, and an axon.
Worn-out red blood cells are destroyed and the hemoglobin is degraded to a yellow pigment known as ____________________, which is excreted into the bile
Fill in the blank(s) with correct word
Which intrinsic foot muscles originate on and insert on tendons?
A) the lumbricals B) the quadratus plantae C) the plantar interossei D) the dorsal interossei E) the flexor digitorum brevis