Virtually all animal cells have a Na+/K+ pump. Which of the following statements concerning it is NOT correct? O a. It is an uniport. O b. O C. O d. It is an active transporter. It transports Na* and K* by consuming ATP as energy. It is also called Na+/K* ATPase.

What is the role of cholesterol in animal cell membranes? A. Blocks the association of the fatty acyl chains of phospholipids at high temperature. B. Is a receptor site for hormones on the surface of membranes. C. Broadens the temperature range of optimum membrane fluidity. D. Aids in the transport of small hydrophobic molecules across the membrane.    A fatty acid designated as 20:0 is ________, while one that is designated 20:3 delta ^5,8,11 is ________. A. complex; simple B. unsaturated; saturated C. saturated; unsaturated D. simple; complex E. monounsaturated; polyunsaturated

Part 1: If a gated channel (not a pump) is specific for potassium ions and based on what you know about concentration gradients, when will the potassium ions move through the channel? a) Is gated channel transport using energy (ATP)? Part 2: Why does the sodium - potassium pump need to use energy (ATP)? a) Define active transport in your own words.

GABA receptors play an essential role in neurotransmission in the central nervous system. In response to the appropriate signal, these receptors open up and allow CI (chloride ions) to flow into the cell. Given this information, GABA receptors can be classified as a A. gated ion channel B. carrier protein O C. symporter D. enzyme

Consider a hypothetical cell where the import of glucose is powered through the coupled export of sodium ions. Which of the following are true? This is known as symport. This process does not require energy. Glucose is moving down its electrochemical gradient. Sodium is moving down its electrochemical gradient.

Emodin (a laxative) is used to treat constipation. This drug inhibits Aquaporin 3 located in the cells lining the colon. a. What can you infer regarding the function of Aquaporin 3? b. How will the drug treat constipation? Answer the questions as stated above. Use the information as guide

At the Vmax of a transporter: O Passive diffusion mechanisms become activated. O The direction of transport reverses. O Half of the transporter molecules are saturated with cargo. O Additional energy is required to further increase the speed of cargo movement. O None of these options describe Vmax of a transporter.

Choose the processes from the list below which require active transport  A. Water moving through the membrane  B. Sodium moving out of a cell C. Potassium moving into a cell  D. Endocytosis  E. Oxygen moving from inhaled air into blood stream.