Describe the mechanisms by which lymphatic fluid is moved through the lymphatics.
What will be an ideal response?
Lymphatic fluid is moved through the lymphatics by the milking action of active skeletal muscles, pressure changes within the thorax during breathing, valves to prevent backflow, and pulsation of adjacent arteries.
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What is the action of all of the negative feedback mechanisms of the body?
What will be an ideal response?
Which of these nerves supplies muscles that adduct the thigh?
A) common fibular nerve B) femoral nerve C) obturator nerve D) sural nerve E) coccygeal plexus
How many sperm are produced from one spermatogonium?
A. One B. Two C. Four D. Eight
Which of the following makes it possible for even a small quantity of hormone to have a strong effect on its target cell?
A) The antagonistic effect B) Enzyme amplification C) Up-regulation D) Down-regulation E) Negative feedback inhibition