Q. No.Sodium potassium pump in neuronal membranes is
(1) Responsible for transfer of 3 sodium outwards and two potassium inwards
(2) Responsible for 2 sodium outwards and three potassium inwards
(3) Responsible for 2 sodium and three potassium inwards
(4) Responsible for 2 sodium and three potassium outwards
(1) Responsible for transfer of 3 sodium outwards and two potassium inwards
(2) Responsible for 2 sodium outwards and three potassium inwards
(3) Responsible for 2 sodium and three potassium inwards
(4) Responsible for 2 sodium and three potassium outwards
At Resting condition, the neuron membrane is
(1) Negative from outside
(2) Negative from inside
(3) Positive from inside
(4) Both A and C
The………. difference across the resting membrane is called as Resting potential.
(1) Electrochemical potential
(2) Electrical potential
(3) Chemical
(4) Chemiosmotic
When a stimulus is applied at a site over neuron membrane
(1) It becomes freely permeable to Sodium ions
(2) It becomes freely permeable to potassium ions
(3) It causes reversal of polarity from positive to negative on inner side
(4) Both A and C
The polarity of the membrane at site A is reversed ie inside of the membrane becomes changed from negative to positive
(1) Called as depolarization
(2) Called as repolarization
(3) Called as polarization
(4) Called as hyperpolarization
The ................ across the plasma membrane at site A is called ............, which is termed as ........
(1) Resting membrane potential, action potential, nerve impulse
(2) Electric potential difference, action potential, nerve impulse
(3) Resting membrane potential, nerve impulse, action potential
(4) Action potential, electric potential difference, active potential
In a neuron if stimulus is given at point A then in which direction current flows?
(1) From site A to site B on innerside
(2) From site A to site B on outerside
(3) From site B to site A on outerside
(4) Both A and C
The rise in stimulus-induced permeability to
a. Potassium ions
b. Sodium ions
c. Restoring RMP
d. Diffusion of potassium ions
Arrange them in order.
1. b-a-c-d
2. a-b-c-d
3. b-a-d-c
4. c-a-d-b
Nerve impulse is transmitted from one neuron to another neuron by the means of
1. Synapse
2. Junction
3. Both 1 and 2
4. Current only
Which of the following has not to be there in a synapse?
(1) Pre synaptic neuron
(2) Post synaptic neuron
(3) Synaptic cleft
(4) None of these
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