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Karnataka SSLC (Class 10) Control and Coordination — practice questions

Explore 14 free Control and Coordination questions in Karnataka SSLC (Class 10) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Control and Coordination questions and exercises with answers

Showing questions 1–14 of 14.

The basic structural and functional unit of the nervous system is theRead the answer and worked solution →The microscopic gap across which a nerve impulse passes from one neuron to the next is theRead the answer and worked solution →A sudden, automatic response to a stimulus, such as pulling the hand off a hot object, is calledRead the answer and worked solution →Receptors that detect smell are calledRead the answer and worked solution →A reflex action is controlled mainly by theRead the answer and worked solution →The part of the human brain that controls balance and posture is theRead the answer and worked solution →Involuntary actions such as heartbeat and breathing are controlled by theRead the answer and worked solution →The hormone that lowers the level of sugar in the blood isRead the answer and worked solution →The 'fight-or-flight' hormone secreted during fear or excitement isRead the answer and worked solution →The bending of a plant shoot towards light is an example ofRead the answer and worked solution →The plant hormone responsible for cell elongation and growth isRead the answer and worked solution →Deficiency of iodine in the diet can cause the thyroid disorder calledRead the answer and worked solution →A nerve impulse travels along a neuron as an electrical signal but crosses a synapse as aRead the answer and worked solution →Hormones are secreted by endocrine glands directly into theRead the answer and worked solution →

Worked practice questions

The basic structural and functional unit of the nervous system is the

  1. nephron
  2. axon
  3. neuron
  4. synapse
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Correct answer: C. neuron

1. The nervous system is a network of specialised cells. 2. Its basic unit is the **neuron** (nerve cell), which conducts impulses. 3. The axon is only a part of a neuron; the nephron belongs to the kidney. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch7 'Control and Coordination', §7.1_

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The microscopic gap across which a nerve impulse passes from one neuron to the next is the

  1. dendrite
  2. axon
  3. cell body
  4. synapse
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Correct answer: D. synapse

1. Neurons do not touch directly; a tiny gap separates them. 2. This gap is the **synapse**, where the impulse is carried across by chemicals. 3. The impulse travels electrically along the neuron but chemically across the synapse. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch7 'Control and Coordination', §7.1_

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A sudden, automatic response to a stimulus, such as pulling the hand off a hot object, is called

  1. a reflex action
  2. a voluntary action
  3. a tropic movement
  4. a conditioned habit
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Correct answer: A. a reflex action

1. Some responses are immediate and do not need conscious thought. 2. Such quick, automatic responses are **reflex actions**. 3. They protect the body from harm faster than the brain could react. _Source: Karnataka SSLC (KSEEB) Class 10 Science, Ch7 'Control and Coordination', §7.1.1_

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