Neural Control and Coordination

1. How many pairs of sympathetic ganglia are present in—
A. 10
B. 12
C. 22
D. 32

2. The pneumotaxic centre and respiratory rhythm centres are respectively present in—
A. pons and medulla oblongata
B. corpus callosum and pons
C. medulla oblongata and hypothalamus
D. diencephalon and pons

3. The primary neurotransmitter at the neuro muscular junction is-
A. Dopamine
B. Adrenaline
C. Acetylcholine
D. acetaldehyde

4. Read the following statements and find the correct ones—
(i) Mid brain, pons varolii and medulla oblongata are together called brain stem
(ii) Paracoels are connected to diocoel through iter
(iii) Heart beat, respiration, swallowing, cough related centres lie in medulla oblongata.
(iv) Cerebellum is also called gyroscope of the body.
A. i, ii, iii
B. i, iii, iv
C. ii, iii, iv
D. i, ii, iv

5. Which of the following statements is false-
A. Hind brain contains medulla, pons and cerebellum
B. Thalamus is an important sensory relay structure.
C. Cerebral cortex in humans is folded into convolutions
D. Hypothalamus has an important role in recognising and experiencing.
6. A-Nerve fibre can become excited through touch, smell, pressure and chemical changes and there is a change in polarity
R – It is called active potential-
A. A and R both are correct and A is correct explanation
B. A is correct and R is wrong
C. A and R both are correct but A is not correct explanation of R
D. A is wrong and R is correct

7. An interneuron consists of the following
A. long dendrites and short axon
B. short dendrites and long and short axon
C. short dendrites and a long axon
D. long dendrites and a long axon

8. How do parasympathetic neural signals affect the working of the heart-
A. heart rate is increased without affecting cardiac output
B. both heart rate and cardiac output increase
C. heart rate decreases but cardiac output increases
D. reduce both heart rate and cardiac output.

9. Injury localised to hypothalamus would most likely disrupt—
A. coordination during locomotion
B. executive functions, such as decision making
C. regulation of body temperature
D. short term memory

10. 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.

11. Which is responsible for interpretation speech-
A. Broca’s area
B. Wernicke’s area
C. Premotor area
D. Association area of sensory cortex

12. Which excitatory neurotransmitter is involved in the transmission of impulse at the neuro-muscular junction?
A. Epinephrine
B. Serotonin
C. Acetylcholine
D. Glycine

13. Which of the following statements are true for “Motor cortex”?—
(i) It is located in the frontal lobe of cerebral cortex.
(ii) It contains pyramidal cells.
(iii) It is responsible for all visual functions.
(iv) It is essential for our thought processes.
(v) It stimulates wakefulness.
(vi) It regulates voluntary muscular movements.
A. (i), (ii), (iii), and (iv)
B. (ii), (iii), (iv), and (v)
C. (ii), (iv), (v) and (vi)
D. (i), (ii), (iv) and (vi)

14. Which is wrong regarding conduction of nerve impulse.
A. In a resting neuron, the axonal membrane is more permeable to K+ ions and nearly impermeable to Na+ ions.
B. Fluid outside the axon has a high concentration of Na+ and low concentration of K+, in a resting neuron
C. Ionic gradients are maintained by Na-K pumps across the resting membrane which transports 3 Na+ ions outwards for 2K+ ions into the cell.
D. A neuron is polarised only when the outer surface of axonal membrane possesses a negative charge and inner surface is positively charged.

15. Choose the functions of sympathetic nervous system-
A. constricts bronchi and pupil of eyes
B. increases heart rate, relaxes bronchi
C. decreases heart rate, increases peristalsis
D. dilates blood vessels, stimulates salivary secretions.

16. in EEG, the waves which are low in frequency but with high amplitude are-
A. Theta waves
B. Delta waves
C. Beta waves
D. Alpha waves

17. Depolarisation of nerve membrane take place through influx of ______ ions.
A. Calcium
B. Potassium
C. Sodium
D. Magnesium

18. Select the correct statement regarding Schwann cells-
A. Surround axon of myelinated nerve fibre
B. Support muscle fibres
C. Found in Haversian system of bones
D. Form basement membrane of epithelium.

19. Synapse is….
A. crossing over between nonhomologous chromosomes
B. pairing of homologous chromosomes
C. junction between axon and dendrite of two different neurons
D. zigzag junction in cardiac muscle fibres.

20. In which part of neuron Nissel’s granules are present—
A. cell body
B. dendrites
C. axon
D. both A and B

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21. The myelin sheath around the axon is produced by which type neuroglial cells?
A. Satellite glial cells
B. Radial glial cells
C. Dendrocytes
D. Schwann cells

22. Assertion : Corpus callosum connects the two cerebral hemispheres
Reason : Association areas are responsible for complex functions like intersensory association of memory and communication
A. Both are true, with reason being correct explanation.
B. Both are true but reason is not correct explanation.
C. Assertion is true but reason is wrong.
D. Both are wrong.

23. What is pH of cerebrospinal fluid—
A. 1.23
B. 6.82
C. 7.00
D. 7.33

24. Which one of the following ions is required for nerve impulse transmission at the neuromuscular junction?
A. Magnesium
B. Chloride
C. Calcium
D. iron

25. The following response to pressure-
A. Meissner’s corpuscle
B. Pacinian corpuscle
C. Bulbs of Krause
D. Organ of Ruffini

26. The organ of Corti is situated on the-
A. basilar membrane in the tympanic canal
B. reissner‘s membrane in the vestibular canal
C. basilar membrane in the median canal
D. reissner‘s membrane in the tympanic canal.

27. Choose the correct statement—
A. Nonmyelinated nerve fibres are found in spinal and cranial nerves
B. Retina has multipolar neurons
C. Electrical synapses are commonly present in humans.
D. Impulse transmission across an electrical synapse is faster than across a chemical synapse.

28. Norepinephrine—
(i) is released by sympathetic fibres
(ii) is released by parasympathetic fibres
(iii) increase the heart rate
(iv) decreases blood pressure
Which of the above statements are correct?
A. (i) and (iii)
B. (ii) and (iii)
C. (ii) and (iv)
D. (i) and (iv)

29. Receptor sites for neurotransmitters are present on :
A. membranes of synaptic vesicles
B. pre-synaptic membrane
C. tips of axons
D. post-synaptic membrane

30. Myelin sheath is produced by:
A. Schwann cells and Oligodendrocytes
B. Astrocytes and Schwann Cells
C. Oligodendrocytes and Osteoclasts
D. Osteoclasts and Astrocytes

31. 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.

32. 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

33. Assertion : All motor neurons are efferent neurons.
Reason : Motor neurons conduct nerve impulses from the spinal cord to the brain.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

34. Large, number of process that project from the apical part of each hair cell of the organ of Corti is called—
A. otolith organ
B. stereo cilia
C. crista ampullaris
D. utricle

35. The visible portion of the eye is—
A. Retina
B. Iris
C. Pupil
D. choroid

36. Choose the wrong statement regarding human ear.
A. The stapes is attached to they tympanic membrane.
B. The Eustachian tube connects the middle ear cavity with the pharynx.
C. The space within the cochlea called scala media is filled with endolymph.
D. Membranous labyrinth is filled with a fluid called endolymph.

37. Read the statements about human neural system and find the wrong one.
A. The CNS includes the brain and the spinal cord.
B. The PNS is divided into somatic and autonomy neural system.
C. The somatic neural system is classified into sympathetic and parasympathetic neural system.
D. The autonomic neural system transmits impulses from the CNS to the involuntary organs and smooth muscles.

38. Destruction of anerior horn cells of spinal cord would result in loss of—
A. sensory impulses
B. voluntary motor impulses
C. commissural impulses
D. integrating impulses.

39. Which one of the following acts solely as an inhibitory neurotransmitter?
A. Norepinephrine
B. Gamma (y) amino butyric acid
C. Acetylcholine
D. Dopamine

40. Which one of the following enzymes is responsible for the conversion of norepinephrine to epinephrine?
A. Catecholamine-O-methyltransferase
B. Phenylalanine-N-methyltransferase
C. DOPA decarboxylase.
D. Monoamine oxidase

41. The bundle of axons in the central nervous system is known as-
A. Nerve
B. Ganglion
C. Tract
D. Neuron

42. Which group of cranial nerves control eye ball movements—
A. Optic, Abducens, Pathetic
B. Optic, Oculomotor, Trochlear
C. Oculomotor, Abducens, Auditory
D. Oculomotor, Abducens, Trochlear

43. Put the following parts of a reflex arc in the correct order beginning with the sensory receptor.
A. Motor neuron
B. Interneuron
C. Effector
D. Sensory neuron
E. Sensory receptor
A. E,D,B,A,C
B. E,D,A,B,C
C. A,B,C,D,E
D. A,E,D,B,C

44. Which one of the following statements is correct regarding spinal cord?
A. It is composed of outer grey matter and inner white matter.
B. It is composed of outer white matter and inner grey matter.
C. It is composed of outer grey matter and inner colourless matter.
D. It is composed of grey matter only.

45. Which is not present in temporal lobe—
A. auditory area
B. olfactory area
C. broca’s area
D. wernicke‘s area

46. In human hindbrian comprises three parts, one of which is—
A. spinal cord
B. corpus callosum
C. cerebellum
D. hypothalamus

47. Which part of the human ear plays role in hearing as such but is otherwise very much required?
A. eustachian tube
B. organ of Corti
C. vestibular apparatus
D. ear ossicles

48. A person entering an empty room suddenly finds a snake right in front of opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
A. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla.
B. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
C. Hypothalamus activates the parasympathetic division of brain.
D. Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex.

49. Vagus nerve is—
A. sensory tenth cranial nerve
B. Motor tenth cranial nerve
C. Mixed tenth cranial nerve
D. Mixed eleventh cranial nerve

50. Given below are assertion and reason. Point out.
Assertion : Myelin sheath insulates nerve fibre and prevents its depolarisation.
Reason : Nerve impulses are conduced more rapidly in non-myelinated fibres than myelinated ones.
A. both are true with reason being correct explanation.
B. both are true but reason is not correct explanation.
C. assertion is true but reason is wrong.
D. both are wrong.