Neural control and coordination practice · Mixed difficulty

Read the following statements w.r.t. synapse
A. Chemical synapse may allow two-way transmission of impulses
B. Neurotransmitters are mandatory for transmission of impulses in all synapse
C. It is always formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron
D. Electrical synapses are rare in our body
State these statements as true(T) or false(F) and choose the correct option.

A person went to ophthalmologist. He had a problem in reading because he was not able to

Which part of the brain is involved in the regulation of sexual behaviour?

Photoreceptor cells that contains the light sensitive proteins are called

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

Small passage which maintains the continuity between scala tympani and scala vestibule is

The velocity of action potential propagation

Select the incorrect statement w.r.t. human neural system

The …… nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon

The reflex arc, which is made of two neurons is known as

If dorsal nerve of spinal cord is broken down then

Which part of brain controls intellectual ability?

Which one of the following is an example of negative feedback loop in humans?

Assertion: Reflex arc comprises of at least one
afferent neuron, one efferent neuron and a part
of PNS.

Reason: The efferent neuron receives signal
from a sensory organ and transmits the impulse
via a ventral nerve root into the PNS.

Lens of eyes is derived from

Which of the following structure or region incorrectly paired with its functions?

Grey matter of the brain is
I. present outside the white matter
II. matter containing medullated nerve fibres
III. grey in colour
IV. matter containing cell bodies
Which of the statements mentioned above are correct?

Which of the following system provides the fastest means of communication within the body?

In laboratory there are three sample of brain which are placed for study. These samples are X, Y, Z.

$\bullet$ In sample X, Y, Z, 12 pair cranial nerves occurs.

$\bullet$ In sample Z, corpus callosum occurs.

What is the correct statement for these brain samples

a. X, Y brain sample may be of reptiles and birds brain.

b. X, Y brain sample may be of amphibian, reptiles, birds brain.

c. Z brain sample surely only mammalian brain.

d. X brain sample may be of birds or mammalian brain.

Which of these processes occur during repolarisation of nerve fibre?1. Open $N{a^ + }$ channel2. Closed $N{a^ + }$ channel3. Closed ${K^ + }$ channel4. Open ${K^ + }$ channel

Ina myelinated neuron, two adjacent myelin sheaths are separated by gaps called

Organ of Corti is found in

Which of the following is not correct for rods?
I. Twilight vision is the function of the rods
II. It is responsible for daylight vision sometimes
III. The rods contain a protein called rhodopsin
IV. Rods are photoreceptor cells
Choose the correct option

A 22 years student goes to his ophthalamologist. He has problem in reading books because he is not be able to contract his

Assertion (A): Nervous system and endocrine system jointly co-ordinate and integrate activities of organs.

Reason (R): Endocrine system regulate all the activities of nervous system.

Assertion: Nerve impulse can never be transmitted from dendrite or cell body of one neuron to the axon of
the next neuron, across a synapse
Reason: This happens because of the synaptic delay at each synapse

Which part of Limbic system converts short term memory into Long term memory?

The joint between axon of a neuron and the dendrite of the next is called

Carotid labyrinth contains

Which of the following statements is correct for the nodes of Ranveir' in nerves?