CBSE Class 11 Biology Neural Control And Coordination Enrichment Worksheet Set B

Important Questions for NCERT Class 11 Biology Neural Control and Coordination

Ques. The nerve centres which control the body temperature and the urge for eating are contained in
(a) hypothalamus (b) pons
(c) cerebellum (d) thalamus. 

Answer: A

Ques. Which part of human brain is concerned with the regulation of body temperature?
(a) Cerebellum (b) Cerebrum
(c) Hypothalamus (d) Medulla oblongata

Answer: C

Ques. Third ventricle of brain is also known as
(a) metacoel (b) rhinocoel
(c) paracoel (d) diacoel. 

Answer: D

Ques. Destruction of the anterior horn cells of the spinal cord would result in loss of
(a) commissural impulses
(b) integrating impulses
(c) sensory impulses
(d) voluntary motor impulses. 

Answer: D

Ques. Which one of the following is the example of the action of the autonomous nervous system?
(a) Swallowing of food
(b) Pupillary reflex
(c) Peristalsis of the intestine
(d) Knee-jerk response 

Answer: C

Ques. Ivan Pavlov performed experiments on
(a) simple reflexes (b) conditioned reflexes
(c) cardiac reflexes (d) origin of life. 

Answer: B

Ques. Match the following columns and select the correct option.
     Column-I                    Column-II
(A) Organ of Corti          (i) Connects middle earand pharynx
(B) Cochlea                   (ii) Coiled part of the labyrinth
(C) Eustachian tube      (iii) Attached to the oval window
(D) Stapes                    (iv) Located on the basilar membrane
(A) (B) (C) (D)
(a) (ii) (iii) (i) (iv)
(b) (iii) (i) (iv) (ii)
(c) (iv) (ii) (i) (iii)
(d) (i) (ii) (iv) (iii) 

Answer: C

Ques. Which of the following statements is correct?
(a) Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.
(b) Cornea is an external, transparent and protective proteinacious covering of the eye-ball.
(c) Cornea consists of dense connective tissue of elastin and can repair itself.
(d) Cornea is convex, transparent layer which is highly vascularised. 

Answer: A

Ques. Which of the following statements is not correct?
(a) An action potential in an axon does not move backward because the segment behind is in a refractory phase.
(b) Depolarisation of hair cells of cochlea results in the opening of the mechanically gated potassium-ion channels.
(c) Rods are very sensitive and contribute to daylight vision.
(d) In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction.

Answer: C

Ques. Which of the following receptors are specifically responsible for maintenance of balance of body and posture?
(a) Basilar membrane and otoliths
(b) Hair cells and organ of corti
(c) Tectorial membrane and macula
(d) Crista ampullaris and macula

Answer: D

Ques. The transparent lens in the human eye is held in its place by
(a) ligaments attached to the ciliary body
(b) ligaments attached to the iris
(c) smooth muscles attached to the iris
(d) smooth muscles attached to the ciliary body.

Answer: A

Ques. Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements.
(1) Vitamin A derivatives are formed from carotene.
(2) The photopigments are embedded in the membrane discs of the inner segment.
(3) Retinal is a derivative of vitamin A.
(4) Retinal is a light absorbing part of all the visual photopigments.
(a) (1), (3) and (4) (b) (1) and (3)
(c) (2), (3) and (4) (d) (1) and (2)

Answer: B

Ques. Choose the correct statement.
(a) Nociceptors respond to changes in pressure.
(b) Meissner’s corpuscles are thermoreceptors.
(c) Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the light stimulus.
(d) Receptors do not produce graded potentials.

Answer: C

Ques. Photosensitive compound in human eye is made up of
(a) opsin and retinol
(b) transducin and retinene
(c) guanosine and retinol
(d) opsin and retinal. 

Answer: D

Ques. In mammalian eye, the ‘fovea’ is the center of the visual field, where
(a) only rods are present
(b) more rods than cones are found
(c) high density of cones occur, but has no rods
(d) the optic nerve leaves the eye. 

Answer: C

Ques. A gymnast is able to balance his body upside down even in the total darkness because of
(a) tectorial membrane
(b) organ of corti
(c) cochlea
(d) vestibular apparatus. 

Answer: D

Ques. Which one of the following statements is not correct?
(a) Retinal is the light absorbing portion of visual photopigments.
(b) In retina the rods have the photopigment rhodopsin while cones have three different photopigments.
(c) Retinal is a derivative of vitamin C.
(d) Rhodopsin is the purplish red protein present in rods only.

Answer: C