Explain what a concentration gradient is and how it assists a cell in doing its work.
What will be an ideal response?
A concentration gradient is a difference in concentration of a particular molecule between the cytosol of a cell and the interstitial fluid. A concentration gradient represents potential energy because of the tendency of molecules to diffuse from areas of high to areas of low concentration.
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The neurons connecting the adrenal medulla to the brain have been severed during surgery. The result will be a significant decrease in parasympathetic signaling.
Answer the following statement true (T) or false (F)
Which of the joints shown in the figure only permits back-and-forth and side-to-side movements between the articulating bones?
a) A b) B c) C d) Both A and B e) Both A and C
Compact bone
A. is located deep to spongy bone in the diaphysis. B. is composed of tubular units called osteons. C. has a brace-like arrangement of trabeculae. D. is avascular. E. All of the choices are correct.
The glomerulus is:
a. part of the renal tubules b. a network of blood capillaries c. the cup-shaped top part of the nephron d. both A and B above