The electrical properties of cells are the result of
A. ion concentration differences across the plasma membrane.
B. receptor sites that are present on the plasma membrane.
C. phosphorylation reactions within the cytoplasm.
D. phospholipids in the cell membrane.
E. None of these choices is correct.
A
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Which organ contains 95 percent of the neural tissue in the body?
A) brain B) nerves C) spinal cord D) thalamus E) None of the answers are correct.
Which blood vessel type would you expect to have the thickest smooth muscle layer? Why?
What will be an ideal response?
________ is the study of tissue structures
A) Gross anatomy B) Pathology C) Biology D) Microbiology E) Histology
When you are exposed to bright light, a reflex is initiated and the muscles of your iris contract to decrease your pupil size. The iris muscles are acting as a(n)
A. effector.?B. control center.?C. receptor.?D. postitive feedback.