An intracellular signal molecule that translates a signal from a neurotransmitter or hormone into an intracellular response is called a ________.
Fill in the blank(s) with the appropriate word(s).
second messenger
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Which of the following will NOT speed up the net rate of diffusion for glucose into a cell?
A) Decreasing the number of phospholipids in the plasma membrane B) Increasing the concentration of glucose outside of the cell. C) Increasing the number of glucose transport proteins within the plasma membrane. D) Decreasing the concentration of glucose within the cell.
Calcitonin targets the bones and causes the release of calcium from storage when serum levels are low
Indicate whether the statement is true or false
The role of cerumen is to ________
A) trap foreign particles that enter the external acoustic meatus B) facilitate vibration of the tympanic membrane C) detect changes in linear movement and respond to gravitational forces D) amplify sound waves
Which of the following can play a role in buffering the pH of urine?
A. ammonia B. bicarbonate ions C. phosphate ions D. ammonia and bicarbonate ions E. ammonia, bicarbonate ions and phosphate ions