Eicosanoids are a family of paracrine secretions derived from _____ that is released from the _____.
a. prostacyclin; smooth endoplasmic reticulum
b. cholesterol; adipocytes
c. prostaglandin; prostate gland
d. leukotrienes; adrenal cortex
e. arachidonic acid; cell membrane
Answer: e. arachidonic acid; cell membrane
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Tara discovers a rapidly growing lump that doubles in size over a month. A doctor does a biopsy and discovers it's a form of cancer, which can result if
A. mitosis is too infrequent. B. the cell cycle runs backward. C. the cell cycle stops. D. mitosis is too frequent.
The penetration of the endometrium by the blastocyst is referred to as
A) cleavage. B) implantation. C) placentation. D) embryogenesis. E) fertilization.
Answer the following statements true (T) or false (F)
1. The urethra tends to be longer in females than in males. 2. In the male the urethra is part of two systems. In the female it is part of only one system. 3. Micturition, voiding, and urination all refer to the same thing. 4. The emptying reflex that allows the bladder to empty causes the contraction of the muscles of the bladder wall, and relaxation of the internal and external urethral sphincter. 5. The internal urethral sphincter is under voluntary control.
During spermatogenesis _______________________
A. the acrosome migrates towards the posterior end of the spermatid because its hydrolytic enzymes will be needed for digestion of the excessive cytoplasm around the flagella of the developing sperm B. the acrosome migrates towards the anterior end of the spermatid because its hydrolytic enzymes will be needed for penetration when the sperm contacts the egg during fertilization C. the acrosome migrates towards the anterior end of the spermatid because its pointy shape helps the sperm move more efficiently D. the acrosome migrates towards the posterior end of the spermatid because of its ability to propel the flagella moving the sperm through the female reproductive system towards the egg