CBSE Class 11 Biology – MCQ and Online Tests – Unit 21 – Neural Control and Coordination
Every year CBSE schools conducts Annual Assessment exams for 6,7,8,9,11th standards. These exams are very competitive to all the students. So our website provides online tests for all the 6,7,8,9,11th standard’s subjects. These tests are also very effective and useful for those who preparing for any competitive exams like Olympiad etc. It can boost their preparation level and confidence level by attempting these chapter wise online tests.
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CBSE Class 11 Biology – MCQ and Online Tests – Unit 21 – Neural Control and Coordination
Question 1.
Which one of the following is the correct statement regarding the particular psychotropic drug specified?
(a) Barbiturates cause relaxation and temporary euphoria
(b) Hashish causes after thought perceptions and hallucinations
(c) Opium stimulates nervous system and causes hallucinations
(d) Morphine leads to delusions and disturbed emotions
Answer
Answer: (b) Hashish causes after thought perceptions and hallucinations
Question 2.
The thin and convoluted outer layer of gray matter that covers the cerebral hemispheres is
(a) Medulla oblongata
(b) Thalamus
(c) Cerebral cortex
(d) Meninges
Answer
Answer: (c) Cerebral cortex
Question 3.
The function of vagus nerve innervating the heart is to
(a) Initiate the heart beat
(b) Reduce the heart beat
(c) Accelerate the heart beat
(d) Maintain constant heart beat
Answer
Answer: (b) Reduce the heart beat
Question 4.
The generation of excitation-contraction coupling involves all the following events except
(a) Generation of end-plate potential
(b) Release of calcium from troponin
(c) Formation of cross-linkages between actin and myosin
(d) Hydrolysis of ATP to ADP
Answer
Answer: (b) Release of calcium from troponin
Question 5.
Which portion of the brain is responsible for various emotions such as pleasure, fear, and happiness?
(a) Thalamus
(b) Reticular formation
(c) Hypothalamus
(d) Limbic system
Answer
Answer: (d) Limbic system
Question 6.
Vestibular apparatus is made up of three semi circular canals. These canals lies at ____ degree angle to each other.
(a) 30
(b) 45
(c) 60
(d) 90
Answer
Answer: (d) 90
Explanation:
Semicircular canals lies at right angle to each other.
Question 7.
At a neuromuscular junction, synaptic vesicles discharge ______.
(a) Acetylcholine
(b) Epinephrine
(c) Adrenaline
(d) None of these
Answer
Answer: (a) Acetylcholine
Question 8.
There are ______ pairs of cranial nerves arising from the brain.
(a) 8
(b) 12
(c) 18
(d) 25
Answer
Answer: (b) 12
Question 9.
When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is
(a) Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
(b) Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions
(c) Equally permeable to both Na+ and K+ ions
(d) Impermeable to both Na+ and K+ ions
Answer
Answer: (a) Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions
Question 10.
Find the odd one.
(a) Schwann cells
(b) Nissl s granules
(c) nephrons
(d) synaptic knob
Answer
Answer: (c) nephrons
Explanation:
Schwann cells, Nissl s granules and synaptic knobs are the parts of neurons.
Question 11.
Which one of the followings is the function of parasympathetic nervous system?
(a) Stimulates oil and sweat glands in the skin
(b) Pupil constriction
(c) Acceleration of heart beat
(d) Contraction of hair muscles
Answer
Answer: (b) Pupil constriction
Question 12.
During resting state, fluid outside axon contains
(a) low concentration of K+
(b) low concentration of Na+
(c) low concentration of Cl–
(d) high concentration of Cl–
Answer
Answer: (a) low concentration of K+
Explanation:
During resting state (when neuron is not conducting any impulse), axoplasm inside the axon contains high concentration of K+
The fluid outside axon contains low concentration of K+.
Question 13.
Select the correct statement from the ones given below
(a) Cocaine is given to patients after surgery as it stimulates recovery
(b) Barbiturates when given to criminals make them tell the truth
(c) Morphine is often given to persons who have undergone surgery as a pain killer
(d) Chewing tobacco lowers blood pressure and heart rate
Answer
Answer: (c) Morphine is often given to persons who have undergone surgery as a pain killer
Question 14.
Which of the following nerves is the largest of all the cranial nerves?
(a) Abducens nerve
(b) Oculomotor nerve
(c) Olfactory nerve
(d) Trigeminal nerve
Answer
Answer: (d) Trigeminal nerve
Question 15.
Which of the following is not related to the autonomic nervous system?
(a) Peristalsis
(b) Digestion
(c) Excretion
(d) Memory and learning
Answer
Answer: (d) Memory and learning
Question 16.
Functions of smooth muscles, cardiac muscles, organs, and glands are regulated by ______ system.
(a) Parasympathetic
(b) Sympathetic
(c) Central nervous
(d) Autonomic
Answer
Answer: (d) Autonomic
Question 17.
Which neuroglia cells produce a fatty insulating material called myelin?
(a) Satellite cells
(b) Schwann cells
(c) Both (A) and (B)
(d) Neither (A) nor (B)
Answer
Answer: (b) Schwann cells
Question 18.
Which layer is in contact with brain tissues?
(a) Piamater
(b) Arachnoid
(c) Duramater
(d) Piamater and Arachnoid
Answer
Answer: (a) Piamater
Explanation:
Brain is covered by cranial meninges.
1) Duramater (outer)
2) Arachnoid (middle)
3) Piamater (inner)- in contact with brain tissues)
Question 19.
The basic cyclic pattern of inspiration and expiration are established by a respiratory center within the ______.
(a) Cerebellum
(b) Medulla oblongata
(c) Cerebral cortex
(d) Thalamus
Answer
Answer: (b) Medulla oblongata
Question 20.
The cutaneous plexus and the papillary plexus consist of
(a) Specialized cells for cutaneous sensations
(b) A network of arteries to provide dermal supply
(c) A network of nerves to provide dermal sensation
(d) Gland cells that release cutaneous secretions
Answer
Answer: (c) A network of nerves to provide dermal sensation
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