All are true of \"hyperpolarization\" except: a. It means that the cell is more

Question

All are true of "hyperpolarization" except: a. It means that the cell is more likely to fire an action potential b. It reflects an increase in the magnitude of the negative potential across the membrane c. It can be caused by opening a voltage-gated potassium channel d. The membrane becomes more negative Dr. B presented the disorder called Type II Diabetes. Which of the following is a TRUE statement regarding this disorder? a. It's caused by excessive glucose secretion b. This disorder causes obesity c. These patients have less than the normal amount of circulating glucose d. These patients exhibit less than normal responsiveness to insulin c. An autoimmune disease that destroys Beta-cells causes this disorder The Utircle, detects _____, whereas the semicircular canals detect _____. a. body position/loudness b. angular acceleration/location c. pitch/gravity d. Linear acceleration/rotational acceleration During the action potential, towards the end of the falling phase what happens when the membrane potential returns close to the resting potential a. K+ voltage-gated channel inactivate b. K+ voltage-gated channels open c. Na+ voltage-gated channels go from the open/active state to the closed/inactive state d. Na+ voltage-gated channels go from the closed/inactive state to the closed/active state What is the effect of sound waves that travel from the oval window, down theses scala vestibule, around the helicotrema, down the scale tympani and out the oval window a. The wave signals the loudest sounds and that information is sent to out brain b. The wave damages the organ of Corti, preventing further normal hearing c. The wave signals the highest frequency sounds and that information is sent to our brain d. The sound wave dissipates and no information about the sound is sent to our brain

Explanation / Answer

16) Answer B , it reflects an increase in the magnitude of negative potential across membrane.

Reason: Not across at a particular site.

Hyperpolarizationoccurs when the membrane potential becomes more negative at a particular spot on the neuron’s membrane. it occur when ion channels open or close in the membrane, regulating the ability of particular ion to enter or exit the cell. In hyperpolarization positive ions flow out of the cell and negative ions flow in. Opening of channels that let K+, out of the cell or Cl into the cell.

17) Answer D, These patients exhibit less than normal response to insulin

Pancreas secretes a harmone called Insulin. insulin makes your cells turn glucose from the food you eat into energy. In type 2 diabetes insulin synthesis will not effect in pancreas, but their cells don't use it as well as they should. Doctors call this as insulin resistance.

18) D

19) C

20)C

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