Neuronal Resting Membrane Potential

Q. In a resting neuron, the axon membrane is

1. comparatively more permeable to $K^{+}$ and nearly impermeable to ${\mathrm{Na}}^{+}$ ions
2. comparatively more permeable to ${\mathrm{Na}}^{+}$ and nearly impermeable to $K^{+}$ ion
3. impermeable to both ${\mathrm{Na}}^{+}$ and $K^{+}$ ions
4. equally permeable to both ${\mathrm{Na}}^{+}$ and $K^{+}$ ions

Q. When a neuron is in resting state, i.e., not conducting any impulse, the axonal membrane is:

1. Comparatively more permeable of $K^{+}$ ions and nearly impermeable to $N{a}^{+}$ ions
2. Comparatively more permeable to $N{a}^{+}$ ions and nearly impermeable to $K^{+}$ ions
3. Equally permeable to both $N{a}^{+}$ and $K^{+}$ ions
4. Impermeable to both $N{a}^{+}$ and $K^{+}$ ions

Q. The charge on the outer side of neuron in resting phase is

1. positive
2. negative
3. zero
4. alternate -ve and +ve

Q. Assume the thylakoid membrane within a chloroplast is punctured so that there is no separation between lumen and stroma of thylakoid. Which of these process would be most affected?

1. Reduction of $NAD{P}^{+}$
2. The splitting of water
3. The flow of electrons from PS - II to PS - I
4. The synthesis of ATP

Q. The factors that are responsible for the maintenance of the resting membrane potential of a neuron is/are

1. High resting state permeability for $K^{+}$ ions
2. Membrane impermeable to proteins
3. Lack of ${Na}^{+}$ leakage channels
4. Membrane impermeable to ${Na}^{+}$ ions.

Q. The given diagram shows the axon terminal and synapse with a few parts labelled as A, B, C & D. Choose the correct combination of labelling from the given options.

1. A- Synaptic vesicle, B- Axon terminal, C- Synaptic cleft, D- Postsynaptic membrane
2. A- Axon terminal, B- Synaptic vesicle, C- Postsynaptic membrane, D- Synaptic cleft
3. A- Synaptic vesicle, B- Synaptic cleft, C- Axon terminal, D- Post synaptic membrane
4. A- Post synaptic membrane, B- Axon terminal, C- Synaptic vesicle, D- Synaptic cleft
   

Q. Explain the formation of Membrane Attack Complex by Complement System

Q. In what ways does the interior surface of the membrane of a resting neuron differ from the external surface?

1. Negatively charged with less sodium
2. Negatively charged with more sodium
3. Positively charged with less sodium
4. Positively charged with more sodium

Q. A polarized neuron is the one that is

1. conducting impulses
2. at resting potential
3. having action potential
4. none of the above

Q. An action potential in the nerve fibre is produced when positive and negative charges on outside and inside of the axon are reversed because

1. all potassium ions leave the axon
2. all sodium ions enter the axon
3. more potassium ions enter the axon as compared to sodium ions leaving it
4. more sodium ions enter the axon is compared to potassium ions leaving it

Q. Choose the correct statement(s) about excitable tissue:

1. Nerve and epithelial tissue are excitable tissue.
2. Excitable tissue produce electrical signals when they get excited.
3. Nerve cells use electrical signals to initiate contraction.
4. Uneven distribution of sodium, potassioum ions and proteins anions across the membrane create membrane potential.

Q.

A resting neuron is (i)_____ and has a membrane potential of (ii)______.

1. (i) Polarized (ii) -70mV

2. (i) Electrochemically neutral (ii) 0 mV

3. (i) Polarized (ii) -55mV

4. (i) Hyperpolarized (ii) -100mV

Q. The most abundant intracellular cation is:

1. $N{a}^{+}$
2. $C{a}^{+}+$
3. $H^{+}$
4. $K^{+}$
   

Q.

A resting neuron is and has a membrane potential of .

1. hyperpolarized
2. polarized
3. 0 mV
4. -70 mV

Q. A cell membrane is more permeable to potassium ions than sodium ions.

1. False
2. True

Q. In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive

1. $K^{+}$ and $N{a}^{+}$ out of the cell
2. $N{a}^{+}$ into the cell
3. $N{a}^{+}$ out of the cell
4. $K^{+}$ into the cell

Q. Choose the correct feature for the events with respect to a neuron: Event Feature

A.	Repolarization	I.	Electrochemical equilibrium at -70 mV
B.	Resting potential	II.	Influx of ${\mathrm{Na}}^{+}$ ions
C.	Hyperpolarization	III.	Voltage gated $K^{+}$ channel opens
D.	Depolarization	IV.	Membrane potential going beyond -70 mV

1. A-III, B-IV, C-I, D-II
2. A-II, B-IV, C-I, D-III
3. A-II, B-I, C-IV, D-III
4. A-III, B-I, C-IV, D-II

Q. Resting membrane potential of all neurons is 70mv.

1. True
2. False

Q. Explain the osmotic theory of opening and closing of stomata.

Q. Choose the correct statement(s) about excitable tissue:

1. Nerve and epithelial tissue are excitable tissue.
2. Excitable tissue produce electrical signals when they get excited.
3. Nerve cells use electrical signals to initiate contraction.
4. Uneven distribution of sodium, potassioum ions and proteins anions across the membrane create membrane potential.

Q. An action potential in the nerve fibre is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed, because

1. More potassium ions enter the axon as compared to sodium ions leaving it
2. More sodium ions enter the axon as compared to potassium ions leaving it
3. All potassium ions leave the axon
4. All sodium ions enter the axon

Q. Value based questions.
If the permeability of the axon membrane to $N{a}^{+}$ ions and $K^{+}$ ions increased simultaneously what effect would this have on the action potential?

Q.

______________ channel help maintain the resting membrane potential.

1. Sodium potassium ATPase pump

2. Na⁺ leakage channels

3. Voltage gated Calcium channels

4. Ligand gated sodium channels

Q. Resting membrane potential of all neurons is 70mv.

1. True
2. False

Q. The ion controlling stomatal movement is

1. $C{a}^{2+}$
2. $N{a}^{+}$
3. $M{g}^{2+}$
4. $K^{+}$

Q. Resting membrane potential of all neurons is 70mv.

1. True
2. False

Q. The nervous system uses .............. to transmit messages.

1. Chemical impulses
2. Mechanical impulses
3. Electrical impulses
4. All of the above

Q. Which of the following theories is not related to the opening of stomata?

1. Sachs
2. Levitt theory
3. $K^{+}$ transport
4. Korper-Kappe theory

Q.

The potential difference between outside and inside of a nerve before excitation is known as

1. spike potential

2. action potential
   

3. resting potential
   

4. reaction potential

Q. During Na${}^{+}$-K${}^{+}$pump,

1. Depends on requirement of cell.
2. 3 Na${}^{+}$ and 3 K${}^{+}$ are transported.
3. 3 Na${}^{+}$ and 2 K${}^{+}$ are transported.
4. 1 Na${}^{+}$ and 2 K${}^{+}$ are transported.