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Class 11 Biology Chapter 21 Neural Control And Coordination Quiz 3 (60 MCQs)

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1. A. Vertebrates have a more developed neural system.B . The efferent nerve fibres transmit impulses from tissues/organs to the CNS
2. What does the neuron's Axon do?
3. When a neuron is not conducting any impulse i.e. resting, the axonal membrane is-
4. Cerebellum of brain is
5. The bulb-like structures present at the terminals of the axon are called the
6. The new potential developed on post-synaptic membrane is-
7. Mark the area of cerebral cortex responsible for complex functions like intersensory association, memory and communication
8. What do Dendrites do?
9. Saltatory conduction means that the membrane potential changes
10. Cavity of vitreous humour (gel) is-
11. Body coordination is maintained by-
12. Afferent nerve fibres carry impulses from
13. Brain stem consists of (1) Amygdala, pons and medulla oblongata (2) Mid brain, pons and medulla oblongata (3) Hippocampus, pons and medulla oblongata (4) Hypothalamus, mid brain, pons and medulla oblongata
14. A-The human neural system is divided into two parts-CNS and PNSB-The autonomic neural system is classified into sympathetic and parasympathetic neural system.
15. The binding of neurotransmitters with the receptors opens ion channel allowing entry of ions which can generate a new potential in the
16. A-axons are covered by myelin sheath in CNS R-these are called tracts in CNS
17. Why is impulse transmission across an electrical synapse always faster than across a chemical synapse?
18. Middle ear is connected through throat through .....
19. Which one of the following is not a refractive medium of the eye?
20. In a nerve if sodium pump is blocked which of the following is likely to happen
21. A-a deep cleft divides cerebrum transversely into two equal halvesR-these halves are known as cerebral hemispheres
22. At blind spot (1) Optic nerves leave the eye and retinal blood vessels enter it (2) Retinal blood vessels leave the eye and optic nerves enter it (3) There is no involvement of optic nerves at all (4) There is no involvement of retinal blood vessels at all
23. Unidirectional transmission of the nerve impulse is maintained by-
24. The thinned-out portion of retina where only cones are densely packed is, called
25. Type of photoreceptor that functions in low light and creates shades of gray
26. Which part of the brain is a major coordinating center for sensory and motor signaling
27. The name of nervous band connecting the cerebral hemispheres is-
28. In reflex action, the reflex arc is formed by-
29. When you enter a dark room with no light .Which photoreceptor cells gets activated?
30. In ear Nerve impulses are generated and transmitted by the afferent fibres to the auditory cortex of the brain.2. The forebrain consists of cerebrum, thalamus and hypothalamus.
31. Reflex action is controlled by-
32. What happens when an impulse (action potential) arrives at the axon terminal of a neuron at a chemical synapse?
33. The association areas are not responsible for (1) Intersensory associations (2) Communication (3) Regulation of sexual behaviour (4) Memory
34. The purplishred pigment rhodopsin contained in the rods type of photo receptor cells of the human eye, is a derivative of
35. At the posterior pole of eye latter to blind spot, there is a yellowish pigmented spot called ..... with a central pit called .....
36. The white portion of the eye (In Humans).
37. The inner parts of cerebral hemispheres and a group of associated deep structures like amygdala, hippocampus, etc; form a complex structure called-
38. Which of the following forms the cerebro spinal fluid?
39. All the nerve of the body associated with CNS are comprised of
40. Which of the following cranial nerve of man is both sensory and motor?
41. Na$^{+}$-K$^{+}$ pumpI. No needs energy (ATP) to workII. Expels 3 Na$^{+}$ for every 2K+ ions importedIII. Works against a concentration gradientIV. Maintains resting potential
42. The pneumotaxic centre in the body is
43. A circular canal.which is found in limbus part of eyes is called
44. Which of the following cells form myelin sheath around axon-
45. If Chlorolab of retina is damaged which colour can not be visualised?
46. What is the main difference between afferent and efferent neurons?
47. Which of the following system relays impulse from CNS to skeletal muscles?
48. What is the term used for the electrical potential difference at the site of excitation, which is also known as a nerve impulse?
49. What do Axon Terminals do?
50. Sodium-Potassium pump across membrane, actively transports
51. What generally maintains the electrical charge across the neuronal membrane?
52. For most excitable cells, the threshold stimulus is
53. The electrical potential difference across the depolarized membrane is called-
54. Which of the following systems transmits impulse from CNS to involuntary organs and smooth muscles?
55. Transmission of an impulse across ..... is very similar to impulse conduction along a single axon.
56. Which cells (layer) of retina faces the lens
57. Colour of eye is due to-
58. A-The imbalance in concentration of Na+, K+ and proteins generates resting potential.R-To maintain the unequal distribution of Na+ & K+, the neurons use electrical energy.
59. Schwann cell are found in
60. S 1-Schwann cell are present in unmyelinated nerve fibre .S 2-Unmyelinated nerve fibre is commonly found in autonomous and the somatic neural systems.
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