9 -During depolarization: a- Voltage gated potassium channels open when the membrane potential reaches threshold value...

9 -During depolarization: a- Voltage gated potassium channels open when the membrane potential reaches threshold value b- Potassium ions move from outside the neuron to inside the neuron c- Sodium ions move from inside the neuron to outside the neuron d- Potential difference reaches +30 mv e- None of the above

Expert Solution

Answer :-. NONE OF THE ABOVE.

Sodium - Potassium pump helps in maintaining negative membrane potential by pumping 3Na+ out of the cell for every 2 K+ into the cell.

Ligand - gated ion channels open allowing Na+ (or Ca2+) to depolarize the cell upto the threshold Voltage.

Once threshold is reached:-

Opening of Voltage gated sodium channels causes influx of Na+ inside the cell causing more positive charge inside the cell to help membrane potential to become more positive and cause Action potential.

K+ channels open at the time of repolarization ,which then moves potassium ions out of the neuron .

Resting Potential of neuron is -70mv. Peak of Action potential is +30mv . This means that the potential difference reaches 100mv.

gladiator answered 2 years ago

Are voltage gated sodium channels, and voltage gated potassium channels considered secondary active transporters? If not...

Are voltage gated sodium channels, and voltage gated potassium channels considered secondary active transporters? If not then what are they called, and could you please explain what a secondary active transporter is and include a common example of one?

In an action potential mechanims, why is there a delayed voltage-gated response as potassium gates open?

Describe the importance of voltage-gated channels in the conduction of an action potential.

The voltage-gated Na+ channels are ---------; Single-gated Double-gated Open upon Acetylcholine binding Allow fast influx of...

The voltage-gated Na+ channels are ---------; Single-gated Double-gated Open upon Acetylcholine binding Allow fast influx of Na+ ions All of the above Only #2 and #4 Only #2, #3 and #4

Which statement is INCORRECT regarding voltage-gated potassium channels? - The gating of the channel involves movements...

Which statement is INCORRECT regarding voltage-gated potassium channels? - The gating of the channel involves movements of transmembrane helices. - The K+ is transported down its concentration gradient. - A cytoplasmic inactivation peptide blocks the channel in response to voltage changes. - K+ coordinates to C=0 groups in the channel. - All of the above.

Describe the relationship between voltage-gated ion channels and the steps of generating an action potential.

What would happen to an Action Potential if voltage-gated K+ channels were blocked? A. the Action...

What would happen to an Action Potential if voltage-gated K+ channels were blocked? A. the Action Potential could not occur B. the Action Potential would not repolarize C. the height of the action potential would be reduced D. the undershoot (after-hyperpolarization) would not occur

QUESTION 1 What letter corresponds to the phase in which voltage-gated Na+ channels are open? action...

QUESTION 1 What letter corresponds to the phase in which voltage-gated Na+ channels are open? action potential.pdf A. B. C. D. E. QUESTION 2 Which of the following statements is true about the mRNA whose structure is depicted in the diagram shown below? mRNA schematic.pdf A.This could be a primary transcript from a prokaryote. B. This could be a primary transcript from a eukaryote but not a prokaryote. C. This could be a mature mRNA from a eukaryote but not...

1. What would happen if there were a blockage to voltage-gated Na+ channels during an action...

1. What would happen if there were a blockage to voltage-gated Na+ channels during an action potential? 2. What would occur to an action potential if there was delayed inactivation of voltage-gated Na+ channels? 3. What would happen to an action potential when a toxin prevents ACh binding to nAChRs on muscle fibres? 4. What would happen to an action potential if a toxin which forms pores in the cell membrane of neurons, allowing the influx of Ca2+ into the...

Graded potentials may: W. initiate an action potential. X. depolarize the membrane to the threshold voltage....

Graded potentials may: W. initiate an action potential. X. depolarize the membrane to the threshold voltage. Y. hyperpolarize the membrane. Z. be called EPSPs or IPSPs. Select one: a. if only W, X and Y are correct b. if only W and Y are correct c. if only X and Z are correct d. if only Z is correct e. if all are correct COULD YOU EXPLAIN NOT JUST THE CORRECT ANSWER BUT THE REASONS FOR ALL PLS

Question