Which statement with regard to Sertoli cells is FALSE?
a. They secrete hormones.
b. They are joined by tight junctions.
c. They form a blood-testis barrier.
d. They phagocytize discarded sperm cytoplasm.
e. They facilitate the movement of sperm into the blood
e
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Measurement of relative water content (RWC) can be used to predict a:
A. plant's ability to recover from cell collapsing B. wilted condition C. need for fertilizers D. cold shock E. salt tolerance
Nutrients clearly limit the growth of plants. Explain four ways that plants have adapted to increase access to nutrients and what limits the association from becoming more common.
What will be an ideal response?
The primary function of the large intestine is
a. formation of feces. b. retention of water. c. manufacture of vitamin K. d. digestion of fats. e. absorption of water
Which of the following characterizes blood flow through capillaries?
A) small total cross-sectional area, so blood flows rapidly B) enormous total cross-sectional area, but wide so that blood cells pass quickly C) enormous total cross-sectional area, but narrow so that blood cells pass slowly D) small total cross-sectional area, so blood flows slowly