Neural control and coordination practice · Mixed difficulty

Assertion (A): Impulse transmission across a electrical synapse is always slower than across a chemical synapse.

Reason (R): The membranes of pre and post synaptic neurons are not in close proximites at electrical synapse.

Saltatory conduction occurs in

True about electrical synapses
I. pre and postsynaptic neurons are in very close proximity
II. pre and postsynaptic neurons are separated by synaptic cleft
III. impulse transmission is very fast
IV. electrical synapses are common in our system
Select the correct option

If an organism has more rods, it will

In knee jerk reflex action, the efferent pathway emerges from

Scientists were able to pinpoint the location of colour processing centers in the visual cortex of the brain by means of

Assertion: Sparrows possess poor night vision.

Reason: Sparrows eyes are made up of
ommatidia.

Visceral nervous system within human body;

(A) is the division of peripheral nervous system

(B) is the division of central nervous system

(C) impulse travel from visceral organ to CNS.

Which of the following option is the most appropriate?

The inner layer of eye, retina contains three layers of neural cells, which does not include

The potential difference across the membrane of nerve fibre when it does not shown any physiological activity is called resting potential. It is about

A man is admitted in a hospital. He is suffering from an abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumour in

The membrane which is responsible to discriminate among different pitches of sound is

Choose the odd pair out in the following.

A: Spinal cord has a column of both grey & white matter
R: Grey matter forms the central spinal canal

Assertion (A): Sodium potassium pump contribute to the negativity of the resting membrane potential.

Reason (R): Sodium potassium pump transports $2{Na}^{+}$ outwards for $3{K}^{+}$into the cell.

The number of cranial nerves in frog and man is

A single Schwann cell can myelinate how many axon(s)?

Following are the steps of mechanism of vision in random order
I. Neural impulses are analysed and image formed on retina is recognised by visual cortex
II. Membrane permeability changes
III. Ganglion cells are excited
IV. Bipolar cells are depolarized
V. Action potential (impulse) is transmitted by optic nerves to visual cortex
VI. Potential differences are generated in the photoreceptor cells
VII. Light energy causes a change in shape of rhodopsin, leading to the dissociation of retinal (an aldehyde of vitamin-A) from opsin (a protein)
VIII. Structure of opsin is changed
Choose the correct sequence

The function of $N{a^ + }$ and ${K^ + }$ pump is to move

Which one is correct about the focusing of the eye?

In the blind spot, where the optic nerves leave the eyes

Identify the correctly matched

Centre of autonomic nervous system is located in

The new potential developed on post synaptic membrane is

How many matching are correct
a. Cornea - Eye ball
b. Choroid - Eye ball
c. Tectorial membrane - Eye ball
d. Sclera layer - Cochlea
e. Crista ampullaris - Cochlea

Which is an example of conditioned reflex?

Read the following statements carefully and select the correct option
I. The medulla is connected to the spinal cord
II. Medulla contains controlling centres for respiration, cardiovascular reflexes and gastric secretion
III. Cerebellum has very convoluted surface in order to provide the additional space for more neurons

Which of the following is an example of conditioned reflex?

Node of Ranvier is found in

How many pairs of cranial nerves are found in humans?