Hair cells in the endolymph hyperpolarize and depolarize as a result of the activity of their...
Hair cells in the endolymph hyperpolarize and depolarize as a result of the activity of their ____ channels.
A. Mechanically gated calcium
B. Voltage-dependent sodium
C. Transmitter-gated potassium
D. Mechanically gated potassium
Homework Answers
Answer: D. Mechanically gated potassium
Hyperpolarization and Depolarization are two actions and those are exact opposite to each other. Hyperpolarization indicates negative while Depolarization indicates positive . These two actions are the result of Mechanically gated potassium
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Hair cells in the endolymph hyperpolarize and depolarize as a
result of the activity of their...
An action potential does not move back wards in the axon because.. a.Voltage-gated sodium channels behind...
An action potential does not move back wards in the axon because.. a.Voltage-gated sodium channels behind the action potential are inactivated. b. Potassium leak channels no longer let potassium ions through c. Voltage-gated sodium channels are open d. Mechanically-gated channels prevent outflow of sodium e. Voltage-gated potassium channels are closed
Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules....
Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules. Cell surface proteins that detect flavor molecules and initiate an action potential could be: Select one: a. potassium leak channels b. intracellularly ligand-gated sodium channels c. aquaporin channels d. mechanically gated channels e. extracellularly ligand-gated sodium channels
Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules....
Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules. Cell surface proteins that detect flavor molecules and initiate an action potential could be: Select one: O a intracellularly ligand-gated sodium channels O b. mechanically gated channels O c. extracellularly ligand-gated sodium channels O d. potassium leak channels e. aquaporin channels
What is the main function of the sodium potassium pump in the neuron? a. Establish concentration...
What is the main function of the sodium potassium pump in the neuron? a. Establish concentration gradients for sodium and potassium ions. b. Depolarize the membrane to threshold. c. Make the inside of the cell more negative than the outside. d. Make the inside of the cell more positive than the outside. e. Pump ions down their concentration gradients during an action potential. A patient of yours has been poisoned by a toxin which prevents fast repolarization of the membrane...
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium...
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium channels to open. The absolute refractory period can last for about 200 ms. Rapid sodium influx causes the membrane to rapidly depolarize. Repolarization occurs immediately after the initial depolarization.
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B)...
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B) Voltage-gated Na channels open. (C) Voltage-gated Cap channels open. (D) Cat-activated Cl channels open. 23. Phase locking is used for sound frequencies up to around 1000 Hz. At higher frequencies, tonotopy is used. The note "concert pitch A", or 440 Hz, is commonly used to tune instruments in an orchestra or musical ensemble. If an instrument is playing concert pitch A, how fast are...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he movement of tropomyosin off of the binding site of actin the binding of acetyleholine with its receptor the binding of caleium with troponin he movement of the action potential down the T-tubal the binding of ATP to the Ca-ATPase on the sarcoplasmic reticulum "Rigor Mortis" is caused b a. the inability of the myosin head to detach from actin b. a lack of calcium...
Which choice represents transport proteins in a neuron? a. Voltage-gated channels and passive transporters b. Passive...
Which choice represents transport proteins in a neuron? a. Voltage-gated channels and passive transporters b. Passive transporters and sodium-potassium cotransporters c. Sodium-potassium cotransporters, passive transporters, and voltage-gated channels d. Voltage-gated channels and passive transporters e. Sodium-potassium cotransporters and voltage-gated channels
The pancreatic B cells that release insulin have potassium channels that close when ATP levels are...
The pancreatic B cells that release insulin have potassium channels that close when ATP levels are high. How does closing potassium channels lead to exocytosis of insulin (Hint: it's the same mechanism as in neurons.) A Question 4 (2 points) Voltage-gated sodium channels need to inactivate, but voltage-gated potassium channels do not. Why? Question 5 (1 point) The convergence of two primary sensory neurons onto a secondary neuron is an example of temporal summation spatial summation
Help! What might be the "stimulus" that initiates the action potential? Incorrect Question 10 0/1 pts...
Help! What might be the "stimulus" that initiates the action
potential?
Incorrect Question 10 0/1 pts Action potential +40 Voltage (mv) 5 Stimulus 1 4 2 3 Time (ms) What might be the "stimulus" that initiates the action potential? the activty of sodium/potassium ATPase the activty of calcium ATPase the activity of potassium ion channels the activity of ligand gated channels the activity of sodium ion channels
Neuronal cells on your taste buds initiate an action potential when they detect specific flavor molecules. Cell surface proteins that detect flavor molecules and initiate an action potential could be: Select one: O a intracellularly ligand-gated sodium channels O b. mechanically gated channels O c. extracellularly ligand-gated sodium channels O d. potassium leak channels e. aquaporin channels
Which statements describe the action potential in cardiomyocytes (heart muscle cells)? Depolarization stimulates voltage-gated, slow calcium channels to open. The absolute refractory period can last for about 200 ms. Rapid sodium influx causes the membrane to rapidly depolarize. Repolarization occurs immediately after the initial depolarization.
22. How are hair cells in the inner ear depolarized? (A) Mechanically-gated K channels open. (B) Voltage-gated Na channels open. (C) Voltage-gated Cap channels open. (D) Cat-activated Cl channels open. 23. Phase locking is used for sound frequencies up to around 1000 Hz. At higher frequencies, tonotopy is used. The note "concert pitch A", or 440 Hz, is commonly used to tune instruments in an orchestra or musical ensemble. If an instrument is playing concert pitch A, how fast are...
causes the sarcoplasmic retieatum of skeletal musele cells to release calcium onto the sarcomere: what he movement of tropomyosin off of the binding site of actin the binding of acetyleholine with its receptor the binding of caleium with troponin he movement of the action potential down the T-tubal the binding of ATP to the Ca-ATPase on the sarcoplasmic reticulum "Rigor Mortis" is caused b a. the inability of the myosin head to detach from actin b. a lack of calcium...
The pancreatic B cells that release insulin have potassium channels that close when ATP levels are high. How does closing potassium channels lead to exocytosis of insulin (Hint: it's the same mechanism as in neurons.) A Question 4 (2 points) Voltage-gated sodium channels need to inactivate, but voltage-gated potassium channels do not. Why? Question 5 (1 point) The convergence of two primary sensory neurons onto a secondary neuron is an example of temporal summation spatial summation
Help! What might be the "stimulus" that initiates the action
potential?
Incorrect Question 10 0/1 pts Action potential +40 Voltage (mv) 5 Stimulus 1 4 2 3 Time (ms) What might be the "stimulus" that initiates the action potential? the activty of sodium/potassium ATPase the activty of calcium ATPase the activity of potassium ion channels the activity of ligand gated channels the activity of sodium ion channels
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