CBSE Class 11 Biology Neural Control and Coordination MCQs Set A

Question : Rods and cones of eyes are modified

a) bipolar neuron

b) multipolar neuron

c) unipolar neuron

d) None of these

Answer : A

Question : The nerve transmitter, produced at the synapse and neuromuscular junction, is

a) acetylcholine

b) GTP

c) ATP

d) phosphokinase

Answer : A

Question :  Alzheimer disease in humans is associated with the deficiency of

a) acetylcholine

b) glutamic acid

c) dopamine

d) None of these

Answer : A

Question : The black pigment in the eye which reduces the internal reflection is located in

a) retina

b) cornea

c) iris

d) sclerotic

Answer : A

Question :  Which one of the following does not act as a neurotransmitter ?

a) Cortisone

b) Epinephrine

c) Acetylcholine

d) Norepinephrine

Answer : A

Question : The cochlea of ear contains

a) perilymph and endolymph

b) only endolymph

c) aqueous humour

d) perilymph

Answer : A

Question : Eustachian tube connects

a) Middle ear with pharynx

b) Internal pharyax

c) External ear with internal ear

d) External ear with middle ear

Answer : A

Question : Mark the incorrect statement

a) Opsin (of Rhodopsin) develops from vitamin A

b) The pressure on ear drum is equalized by eustachian tube

c) Otolith organ consists of saccule and utricle

d) None of these

Answer : A

Question : Frequency of sound is discriminated by

a) The site at the cochlear coi

b) All of these

c) The type of fluid - perilymph or endolymph

d) The intensity of movement of basilar fibres of cochlea

Answer : A

Question : Saltatory conduction of nerve impulse takes place through

a) Myelinated fibre

b) Non-myelinated fibre

c) Grey fibres

d) None of these

Answer : A

Question : Among which one of the following groups of chemicals, all are neurotransmitters?

a) Acetylcholine, noradrenaline, dopamine

b) Noradrenaline, somatostatin, threonine

c) Somatostatin, serotonin, acetylcholine

d) Glycine, dopamine, melatonin

Answer : A

Question : The enzyme required for the conduction of nerve impulse across synapse is

a) choline acetylase

b) succinic dehydrogenase

c) peroxidase

d) ascorbic acid oxidase

Answer : A

Question : The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of

a) Vitamin A

b) Vitamin B₁

c) Vitamin D

d) Vitamin C

Answer : A

Question : During stress condition which of the following nerves start working?

a) Sympathetic nerves

b) Parasympathetic nerves

c) Autonomic nerves

d) Cranial nerves

Answer : A

Question : The gelatinous membrane covering the sensorys hair cells of the ear is known as

a) tectorial membrane

b) Reissner's membrane

c) basilar membrane

d) neuro-sensory membrane

Answer : A

Question : Nerve cells do not divide because they do not have

a) centrosome

b) mitochondria

c) nucleus

d) Golgi body

Answer : A

Question : The local depolarization of a receptor-cell membrane is called as

a) action potential.

b) resting potential

c) threshold potential

d) None of these

Answer : A

Question : You are sitting in biology class daydreaming. Yourintrinsic heartbeat is controlled by

a) levels of adrenaline in the blood.

b) the medulla

c) the cerebrum

d) the spinal cord

Answer : A

Question : The threshold of a neuron is

a) The membrane voltage at which the membrane potential develops into an action potential

b) the amount of excitatory neurotransmitter required to elicit an action potential

c) The membrane voltage at which an axon potential will be suppressed

d) The amount of inhibitory neurotransmitter required to inhibit an action potential.

Answer : A

Question : Arbor vitae is composed of

a) White matter

b) Neuroglea cells

c) Grey matter

d) All of these

Answer : A