When the potential across a membrane reaches threshold, the sodium channels ____.
a. open to let sodium enter the cell rapidly
b. close to prevent sodium from entering the cell
c. open to let sodium exit the cell rapidly
d. close to prevent sodium from exiting the cell
Question 2
Your posterior pituitary is most likely to release antidiuretic hormone (ADH) ____.
a. if you are very thirsty
b. shortly after drinking a large glass of water
c. if you are very hungry
d. shortly after eating a large meal
Gas exchange occurs at the alveolar capillary membrane.
Membrane potential of a cell freely permeable to sodium only.
Dose-response curve with threshold
Anatomy of the Large Intestine By the time chyme reaches the large intestine, most of its nutrients
The plasma membrane
The Ames test, which screens compounds for potential mutagenicity