Tiêu đề 7 Control and Coordination - MCQs.pdf ✅

© www.bankofbiology.com 8921 510 476 1 7. CONTROL AND COORDINATION - MCQs ANIMALS - NERVOUS SYSTEM 1. In animals, control and coordination are provided by a) Nervous and skeletal tissues b) Nervous and muscular tissues c) Skeletal and muscular tissues d) Only nervous tissue Answer: b) Nervous and muscular tissues 2. Nervous tissue is made up of a network of a) Neurons b) Areolar cells c) Adipose cells d) Dendrons Answer: a) Neurons 3. A part of the body which responds to the instructions sent from nervous system is called a) receptor b) effector c) nerves d) muscles Answer: b) effector 4. Which nerves transmit impulses from the central nervous system towards muscle cells? a) Sensory nerves b) Motor nerves c) Relay nerves d) Cranial nerves Answer: b) Motor nerves 5. The longest fibre on the cell body of a neuron is called a) sheath b) cytoplasm c) axon d) dendrites Answer: c) axon 6. The receptors that detect taste are called a) Gustatory receptors b) Olfactory receptors c) Photoreceptors d) Cutaneous receptors Answer: a) Gustatory receptors 7. The receptors that detect smell are called a) Photoreceptors b) Auditory receptors c) Olfactory receptors d) Gustatory receptors Answer: c) Olfactory receptors 8. General perception of taste is jointly created by a) Tongue and nose b) Tongue and eye c) Tongue only d) Tongue, nose and eye Answer: a) Tongue and nose 9. Junctions of two neurons is called a) Synapse b) Synapsis c) Dendrite d) Axonite Answer: a) Synapse 10. Assertion: Impulse travels from dendrite to cell body and then along the axon to its end. Reason: Information acquired at the end of the dendrite tip of a nerve cell sets of an electric impulse. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. e) Both A and R are false. Answer: a) 11. Which is the correct sequence of impulse transmission? a) Dendrite → Receptors → axon → cell body → synapse → next neuron/muscle/gland b) Receptors → dendrite → cell body → axon → synapse → next neuron/muscle/gland c) Cell body → axon → Receptors → dendrite → synapse → next neuron/muscle/gland d) Receptors → cell body → axon → synapse → dendrite → next neuron/muscle/gland Answer: b) 12. Reflex actions are mediated through a) brain b) effectors c) spinal cord d) receptors Answer: c) spinal cord 13. Reflex actions are a) Gradual voluntary actions of the body in response to a stimulus. b) Sudden voluntary actions of the body in response to a stimulus. c) Sudden conscious actions of the body in response to a stimulus. d) Sudden unconscious actions of the body in response to a stimulus. Answer: d) 14. Which of the following is not a reflex action? a) Withdrawal of hand when we touch a flame. b) Blinking of eyes when light falls on them. c) Salivating when smelling food. d) Enjoying the smell of a flower. Answer: d) Enjoying the smell of a flower 15. The pathway of impulses in a reflex action is called a) Reflex arc b) Afferent pathway c) Efferent pathway d) Motor pathway Answer: a) Reflex arc 16. Select the correct sequence of parts of a reflex arc.
© www.bankofbiology.com 8921 510 476 2 a) Receptor → effector → sensory neuron → motor neuron → CNS b) Receptor → sensory neuron → motor neuron → CNS → effector c) Receptor → sensory neuron → CNS → motor neuron → effector d) Receptor → motor neuron → sensory neuron → CNS → effector Answer: c) 17. Select the correct sequence of reflex arc of focussing bright light on eyes. a) Receptor → Sensory neuron → Eye → Brain → Motor neuron → Eye muscle contracts b) Receptor → Sensory neuron → Brain → Motor neuron → Eye → Eye muscle contracts c) Receptor → Motor neuron → Sensory neuron → Brain → Eye → Eye muscle contracts d) Receptor → Eye → Sensory neuron → Motor neuron → Brain → Eye muscle contracts Answer: b) 18. Which parts act as the effector? a) Muscle & gland b) Muscle & sense organs c) Gland & sense organs d) Muscle & Nerves Answer: a) Muscle & gland 19. Which part of the nervous system do nerves from all body parts meet on their way to the brain? a) Brainstem b) Cerebellum c) Spinal cord d) Medulla oblongata Answer: c) Spinal cord 20. The neurons that carry nerve impulse from spinal cord to effectors are called a) Sensory neurons b) motor neurons c) Interneurons d) spinal neurons Answer: b) motor neurons 21. Assertion: Reflex Arc works faster than thinking process of brain. Reason: Reflex Arc works in case of those animals who do not have thinking process. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. e) Both A and R are false. Answer: c) A is true but R is false 22. The main coordinating centre in the human body is a) spinal cord b) heart c) brain d) kidney Answer: c) brain 23. The brain is lodged inside the cavity of skull known as a) Pia mater b) Dura mater c) Cranium d) Meninges Answer: c) Cranium 24. Assertion: Brain is a delicate organ which is protected from injury. Reason: The bony box protects the brain from shock. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. e) Both A and R are false. Answer: c) A is true but R is false 25. Brain & spinal cord constitute the a) Central nervous system (CNS) b) Peripheral nervous system (PNS) c) Autonomous nervous system (ANS) d) Visceral nervous system Answer: a) Central nervous system (CNS) 26. Communication between CNS and other parts of the body is facilitated by the a) Autonomous nervous system (ANS) b) Sympathetic nervous system c) Peripheral nervous system (PNS) d) Parasympathetic nervous system Answer: c) Peripheral nervous system (PNS) 27. Peripheral nervous system (PNS) consists of a) Brain and Cranial nerves b) Spinal cord and spinal nerves c) Brain and spinal cord d) Cranial nerves and spinal nerves Answer: d) Cranial nerves and spinal nerves 28. The main thinking part of the brain is a) Forebrain b) Midbrain c) Hindbrain d) Brain stem Answer: a) Forebrain 29. The regions of forebrain where the interpretation of sensory information occurs by associating with information from other receptors and previously stored information are called a) Sensory areas b) Motor areas c) Association areas d) Broca’s area Answer: c) Association areas 30. Salivation, heartbeat etc. are the involuntary actions between simple reflex actions and thought-out actions. They are controlled by
© www.bankofbiology.com 8921 510 476 3 a) Forebrain and midbrain b) Midbrain and hind-brain c) Forebrain and hind-brain d) Midbrain only Answer: b) Midbrain and hind-brain 31. Which part of the brain controls involuntary actions such as blood pressure, salivation, vomiting etc.? a) Cerebrum b) Cerebellum c) Hypothalamus d) Medulla oblongata Answer: d) Medulla oblongata 32. Voluntary actions and posture and balance of the body are controlled by a) Pons b) Medulla oblongata c) Cerebellum d) Cerebrum Answer: c) Cerebellum 33. Voluntary muscles are the muscles a) attached to skeleton and can be moved as we decide. b) found in the walls of internal organs that function without conscious control. c) responsible for involuntary movements, such as those in the digestive tract. d) that control reflex actions and operate without conscious thought. Answer: a) 34. Involuntary muscles are the muscles a) attached to the skeleton that we can move voluntarily. b) responsible for reflex actions and are under conscious control. c) found in visceral organs and are not under our control. d) found in the heart and are controlled by conscious thought. Answer: c) COORDINATION IN PLANTS 35. Assertion: Plants do have a nervous system for control and coordination. Reason: Plants use electro chemical means to convey information from cell to cell. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. e) Both A and R are false. Answer: d) A is false but R is true 36. Any change in the environment to which an organism responds is called a) stimulus b) coordination c) response d) hormone Answer: a) stimulus 37. Some plants (e.g. pea) have tendrils to climb up or fence. They are sensitive to touch. When tendrils contact with a support, the touching part does not grow as rapidly as the part away from object. So, tendril circles around and clings to the object. 38. Environmental triggers such as light, gravity etc. change the directions of plant growth. They are called a) Tropic movements b) Nastic movements c) Turgor movements d) Growth movements Answer: a) Tropic movements 39. The tropic movement in response to light is called a) Phototropism b) Geotropism c) Chemotropism d) Hydrotropism Answer: a) Phototropism 40. Movement of sunflower in accordance with the path of Sun is due to a) Chemotropism b) Geotropism c) Phototropism d) Hydrotropism Answer: c) Phototropism 41. Movement of plant parts in response to the pull of earth or gravity is called a) Phototropism b) Geotropism c) Hydrotropism d) Chemotropism Answer: b) Geotropism 42. Roots of plants are a) positively geotropic b) negatively geotropic c) positively phototropic d) None of these Answer: a) positively geotropic 43. The movement of a plant toward or away from water is called a) Chemotropism b) Phototropism c) Geotropism d) Hydrotropism Answer: d) Hydrotropism 44. Roots bend towards the moist soil is an example for a) Chemotropism b) Phototropism c) Hydrotropism d) Geotropism Answer: c) Hydrotropism 45. The movement of plant towards or away from chemicals is called a) Chemotropism b) Phototropism
© www.bankofbiology.com 8921 510 476 4 c) Hydrotropism d) Geotropism Answer: a) Chemotropism 46. Which of the following is an example for chemotropism? a) Movement of roots towards water. b) Response of a plant to light direction. c) Growth of tendrils around a support. d) Growth of pollen tubes towards ovules. Answer: d) Growth of pollen tubes towards ovules. 47. Which statement is incorrect about auxins? a) They promote the growth of root b) They promote the growth of shoot c) They influence the formation of flower and ripening of fruit d) They inhibit the growth of root Answer: a) They promote the growth of root 48. Which of the following is a plant hormone? a) Insulin b) Thyroxin c) Oestrogen d) Cytokinin Answer: d) Cytokinin 49. Which plant hormone promotes cell division? a) Auxin b) Gibberellin c) Cytokinin d) Abscisic acid Answer: c) Cytokinin 50. Which of the following is associated with wilting of leaves? a) Auxin b) Gibberellins c) Cytokinins d) Abscisic acid Answer: d) Abscisic acid 51. The main effect of cytokinin in plants is to a) improve the quality of fruits b) prevent the growth of lateral buds c) regulate opening and closing of stomata d) promote cell division Answer: d) promote cell division 52. The main function of abscisic acid in plants is a) to promote cell division. b) to inhibit growth. c) to promote growth of stem. d) to increase the length of cells. Answer: b) to inhibit growth 53. Main function of gibberellins is a) The development of flowers. b) The formation of seeds. c) The growth of the stem. d) The development of root systems. Answer: c) The growth of the stem HORMONES IN ANIMALS (ENDOCRINE SYSTEM) 54. Which of the following is not an endocrine gland? a) Adrenal b) Liver c) Thyroid d) Pituitary Answer: b) Liver 55. Which of the following acts as both endocrine and exocrine glands? a) Adrenal b) Pituitary c) Ovaries d) Pancreas Answer: d) Pancreas 56. ................... Secretes Releasing hormones which stimulates pituitary gland to release hormones. a) Hypothalamus b) Adrenal gland c) Pancreas d) Pineal gland Answer: a) Hypothalamus 57. Growth hormone releasing factor is a Releasing hormone that stimulates pituitary gland to release a) GH b) FSH c) LH d) MSH Answer: a) GH 58. Which gland secretes the growth hormone (GH)? a) Pituitary gland b) Thyroid c) Hypothalamus d) Adrenal Answer: a) Pituitary gland 59. Deficiency of GH in childhood causes a) Acromegaly b) Dwarfism c) Gigantism d) Myxedema Answer: b) Dwarfism 60. Overproduction of GH in childhood results in a) Gigantism b) Acromegaly c) Goitre d) Cretinism Answer: a) Gigantism 61. Assertion: On attaining puberty, breast size increases and reproductive organs develop in females. Reason: Ovaries release hormone progesterone in female. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. e) Both A and R are false. Answer: b) 62. Select the mismatched pair.