Gr 9 NATURAL SCIENCES: CH 1.2 The nervous system
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Questions and Answers

What is the main function of the nervous system?

  • To regulate body temperature
  • To control the digestive system
  • To produce hormones
  • To transmit nerve impulses between different parts of the body (correct)

    • What is the peripheral nervous system (PNS)?

  • The sensory organs
  • The central nervous system
  • The spinal cord
  • The network of nerves that connect the CNS to the limbs and organs (correct)

    • What is the primary function of the brain?

  • To interpret sensory information (correct)
  • To regulate body temperature
  • To control the digestive system
  • To produce hormones

    • What is the function of the spinal cord?

    <p>To transmit signals between the brain and the rest of the body</p> Signup and view all the answers

    What is the function of sensory organs?

    <p>To collect information from the environment</p> Signup and view all the answers

    What do nerves transmit?

    <p>Electrical impulses</p> Signup and view all the answers

    What is the function of the eyes?

    <p>To detect light and enable vision</p> Signup and view all the answers

    What is the function of the ears?

    <p>To detect sound waves and enable hearing</p> Signup and view all the answers

    What is the function of the nose?

    <p>To detect airborne chemicals and enable the sense of smell</p> Signup and view all the answers

    What forms the central nervous system (CNS)?

    <p>The brain and spinal cord</p> Signup and view all the answers

    Which sense organ detects different flavors?

    <p>Tongue</p> Signup and view all the answers

    What is the function of the hypothalamus?

    <p>Regulating body temperature</p> Signup and view all the answers

    What is the result of damage to the brain or spinal cord?

    <p>Paralysis</p> Signup and view all the answers

    What is the function of olfactory receptors?

    <p>Detecting airborne chemicals</p> Signup and view all the answers

    What is the result of a stroke?

    <p>Death of brain cells</p> Signup and view all the answers

    What is the function of sensory receptors in the skin?

    <p>Detecting pressure, temperature, and pain</p> Signup and view all the answers

    What is the effect of substance abuse on the brain?

    <p>Permanent brain damage</p> Signup and view all the answers

    What is the function of photoreceptor cells in the retina?

    <p>Converting light into electrical signals</p> Signup and view all the answers

    What is the result of degenerative disorders?

    <p>Progressive degeneration of the nervous system</p> Signup and view all the answers

    What is the function of hair cells in the cochlea?

    <p>Converting sound waves into electrical signals</p> Signup and view all the answers

    What is the main pathway for transmitting signals between the brain and the rest of the body?

    <p>Nerves</p> Signup and view all the answers

    Which region of the brain controls thought, memory, and emotion?

    <p>Cerebrum</p> Signup and view all the answers

    What is the function of the spinal cord?

    <p>To transmit signals between the brain and the rest of the body</p> Signup and view all the answers

    What is the function of the eyes?

    <p>To detect light and enable vision</p> Signup and view all the answers

    What is the purpose of the nervous system?

    <p>To transmit nerve impulses between different parts of the body</p> Signup and view all the answers

    What is the function of sensory organs?

    <p>To collect information from the environment</p> Signup and view all the answers

    What is composed of different regions that control various functions?

    <p>Brain</p> Signup and view all the answers

    What is the function of the nasal cavity?

    <p>To detect airborne chemicals and enable the sense of smell</p> Signup and view all the answers

    What forms the peripheral nervous system?

    <p>Nerves</p> Signup and view all the answers

    What is the function of the nervous system in relation to the body's actions?

    <p>To transmit signals to and from different parts of the body</p> Signup and view all the answers

    Which part of the body receives signals about temperature, pressure, and pain?

    <p>Skin</p> Signup and view all the answers

    What is the role of neurons in the brain?

    <p>To send and receive electrical impulses</p> Signup and view all the answers

    What is the function of the auditory nerve?

    <p>To transmit electrical signals from the ear to the brain</p> Signup and view all the answers

    What is the result of a broken neck?

    <p>Paralysis</p> Signup and view all the answers

    What is the function of the optic nerve?

    <p>To transmit electrical signals from the eye to the brain</p> Signup and view all the answers

    What is the cause of permanent damage and loss of function in parts of the body?

    <p>All of the above</p> Signup and view all the answers

    What is the function of the hypothalamus?

    <p>To regulate body temperature</p> Signup and view all the answers

    What is the effect of substance abuse on the brain?

    <p>It causes significant damage to the brain</p> Signup and view all the answers

    What is the role of neurotransmitters?

    <p>To transmit electrical signals across synapses</p> Signup and view all the answers

    What is the result of damage to sensory organs?

    <p>Impaired ability to process sensory information</p> Signup and view all the answers

    What is the primary function of the nerves in the peripheral nervous system?

    <p>To transmit messages to and from the brain and spinal cord</p> Signup and view all the answers

    Which of the following is NOT a function of the brain?

    <p>Producing hormones</p> Signup and view all the answers

    What is the main difference between the central nervous system and the peripheral nervous system?

    <p>The CNS is responsible for controlling the body's functions, while the PNS connects the CNS to the limbs and organs</p> Signup and view all the answers

    What is the role of specialized cells in sensory organs?

    <p>To detect specific stimuli</p> Signup and view all the answers

    What is the primary function of the spinal cord?

    <p>To transmit signals between the brain and the rest of the body</p> Signup and view all the answers

    What is the result of damage to the central nervous system?

    <p>Permanent damage and loss of function in parts of the body</p> Signup and view all the answers

    What is the role of the brain in the nervous system?

    <p>To interpret sensory information</p> Signup and view all the answers

    Which of the following is an example of a sensory organ?

    <p>The eyes</p> Signup and view all the answers

    What is the function of nerve impulses in the nervous system?

    <p>To transmit messages to and from the brain and spinal cord</p> Signup and view all the answers

    What is the primary function of the central nervous system?

    <p>To coordinate the body's actions and sensory information</p> Signup and view all the answers

    What is the primary function of neurons in the brain?

    <p>To transmit signals across synapses</p> Signup and view all the answers

    What is the role of the hypothalamus in the brain?

    <p>To regulate body temperature</p> Signup and view all the answers

    What is the primary function of the auditory nerve?

    <p>To transmit auditory signals from the ear to the brain</p> Signup and view all the answers

    What is the result of damage to the spinal cord?

    <p>Severe and often irreversible consequences</p> Signup and view all the answers

    What is the primary function of the optic nerve?

    <p>To transmit visual signals from the eye to the brain</p> Signup and view all the answers

    What is the primary function of hair cells in the cochlea?

    <p>To convert sound waves into electrical signals</p> Signup and view all the answers

    What is the primary function of photoreceptor cells in the retina?

    <p>To convert light into electrical signals</p> Signup and view all the answers

    What is the primary function of the olfactory receptors in the nasal cavity?

    <p>To detect airborne chemicals</p> Signup and view all the answers

    What is the primary function of taste buds on the tongue?

    <p>To detect different flavors</p> Signup and view all the answers

    What is the primary function of sensory receptors in the skin?

    <p>To detect pressure, temperature, and pain</p> Signup and view all the answers

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