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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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 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
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