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

What is the primary function of the nervous system?

  • To filter blood
  • To transmit nerve impulses between different parts of the body (correct)
  • To regulate body temperature
  • To produce hormones

Which part of the brain is responsible for initiating responses?

  • Spinal cord
  • Cerebrum (correct)
  • Cerebellum
  • Brainstem

What is the function of the spinal cord?

  • To store memories
  • To generate thoughts and emotions
  • To process sensory information
  • To transmit neural signals between the brain and the rest of the body (correct)

What are the basic functional units of the nervous system?

<p>Neurons (B)</p> Signup and view all the answers

How do neurons communicate with each other?

<p>Through chemical neurotransmitters (B)</p> Signup and view all the answers

What is the function of sensory organs?

<p>To detect external stimuli and send information to the brain (A)</p> Signup and view all the answers

What type of nerves connect directly to the brain?

<p>Cranial nerves (A)</p> Signup and view all the answers

What is the process of transmitting electrical impulses called?

<p>Transmission of nerve impulses (A)</p> Signup and view all the answers

Which part of the neuron receives signals?

<p>Dendrites (B)</p> Signup and view all the answers

What is the function of the brainstem?

<p>To control involuntary actions (C)</p> Signup and view all the answers

What is the role of sensory neurons in the nervous system?

<p>Carrying information from sensory receptors to the CNS (A)</p> Signup and view all the answers

What is the result of a stroke in the nervous system?

<p>Loss of neural function due to lack of oxygen (C)</p> Signup and view all the answers

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

<p>Processing information and sending out motor commands (B)</p> Signup and view all the answers

What is a reflex action in the nervous system?

<p>A rapid, involuntary response to stimuli (A)</p> Signup and view all the answers

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

<p>Coordinating with the nervous system to regulate body functions (D)</p> Signup and view all the answers

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

<p>Paralysis of the limbs (C)</p> Signup and view all the answers

What is the impact of substance abuse on the nervous system?

<p>Irreversible brain damage (A)</p> Signup and view all the answers

What is the role of motor neurons in the nervous system?

<p>Carrying information from the CNS to muscles and glands (D)</p> Signup and view all the answers

What is a degenerative disorder in the nervous system?

<p>A condition that causes progressive loss of neural function (C)</p> Signup and view all the answers

What is the result of damage to the nervous system?

<p>Loss of cognitive function (C)</p> Signup and view all the answers

What is the primary function of the cerebrum?

<p>To process sensory information, initiate responses, store memories, and generate thoughts and emotions (D)</p> Signup and view all the answers

Which part of the nervous system is responsible for coordinating reflexes?

<p>Spinal cord (B)</p> Signup and view all the answers

What is the role of axons in neurons?

<p>To send signals (D)</p> Signup and view all the answers

What is the function of chemical neurotransmitters in the nervous system?

<p>To facilitate communication between neurons through synapses (B)</p> Signup and view all the answers

What is the main function of cranial nerves?

<p>To connect directly to the brain (A)</p> Signup and view all the answers

What is the role of the cell body in neurons?

<p>To maintain the health and function of the neuron (B)</p> Signup and view all the answers

What is the function of the cerebellum?

<p>To coordinate voluntary and involuntary actions (A)</p> Signup and view all the answers

What is the result of the transmission of nerve impulses?

<p>The coordination of voluntary and involuntary actions (D)</p> Signup and view all the answers

What is the role of dendrites in neurons?

<p>To receive signals (D)</p> Signup and view all the answers

What is the function of the nervous system in relation to the external environment?

<p>To receive and process sensory information (D)</p> Signup and view all the answers

What is the purpose of neurotransmitters in the nervous system?

<p>To carry the signal to the next neuron (B)</p> Signup and view all the answers

Which type of neurons carry information from sensory receptors to the CNS?

<p>Sensory neurons (D)</p> Signup and view all the answers

What is the main characteristic of reflex actions?

<p>They are rapid and involuntary (C)</p> Signup and view all the answers

What is the role of the nervous system in maintaining homeostasis?

<p>To coordinate with the endocrine system to maintain homeostasis (B)</p> Signup and view all the answers

What is a common result of damage to the brain or spinal cord due to accidents or injuries?

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

Which of the following is a degenerative disorder?

<p>Alzheimer's disease (B)</p> Signup and view all the answers

What is the effect of substance abuse on the nervous system?

<p>It can cause irreversible brain damage (A)</p> Signup and view all the answers

What is the purpose of the CNS in the nervous system?

<p>To process information and send out motor commands (A)</p> Signup and view all the answers

What is the impact of a stroke on the brain?

<p>It can cause brain cells to die due to lack of oxygen (A)</p> Signup and view all the answers

What is the role of motor neurons in the nervous system?

<p>To send out motor commands to muscles and glands (C)</p> Signup and view all the answers

What is the primary role of the CNS in sensory input and motor output?

<p>To process and integrate sensory information from multiple sources. (C)</p> Signup and view all the answers

What is the primary consequence of damage to the brain or spinal cord from accidents or injuries?

<p>Loss of function, such as paralysis or cognitive impairments. (C)</p> Signup and view all the answers

What is the primary characteristic of reflex actions?

<p>They are rapid, involuntary responses to stimuli. (A)</p> Signup and view all the answers

What is the primary role of the nervous system in regulating body functions?

<p>To maintain homeostasis and coordinate with the endocrine system. (D)</p> Signup and view all the answers

What is the primary consequence of a stroke in the nervous system?

<p>Death of brain cells due to lack of oxygen. (A)</p> Signup and view all the answers

What is the primary consequence of degenerative disorders on neural function?

<p>Progressive loss of neural function. (B)</p> Signup and view all the answers

What is the primary role of neurotransmitters in the nervous system?

<p>To transmit signals from one neuron to another. (C)</p> Signup and view all the answers

What is the primary consequence of substance abuse on the nervous system?

<p>Irreversible brain damage and memory loss. (B)</p> Signup and view all the answers

What is the primary role of the sensory organs in the nervous system?

<p>To receive and transmit sensory information from the environment. (C)</p> Signup and view all the answers

What is the primary consequence of trauma and injuries on the nervous system?

<p>Loss of function, such as paralysis or cognitive impairments. (B)</p> Signup and view all the answers

What is the primary function of the brain in relation to the nervous system?

<p>To process sensory information, initiate responses, store memories, and generate thoughts and emotions (C)</p> Signup and view all the answers

What is the main function of the spinal cord in relation to the nervous system?

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

What is the function of neurons in the nervous system?

<p>To receive, integrate, and send signals (B)</p> Signup and view all the answers

What is the role of sensory organs in the nervous system?

<p>To detect external stimuli and send information to the brain for interpretation (C)</p> Signup and view all the answers

What is the function of the cerebrum in the nervous system?

<p>To process sensory information, initiate responses, store memories, and generate thoughts and emotions (B)</p> Signup and view all the answers

What is the role of axons in neurons?

<p>To send signals to other neurons or to muscles or glands (C)</p> Signup and view all the answers

What is the function of chemical neurotransmitters in the nervous system?

<p>To facilitate communication between neurons at synapses (D)</p> Signup and view all the answers

What is the purpose of the brainstem in the nervous system?

<p>To regulate essential functions such as breathing, heart rate, and blood pressure (C)</p> Signup and view all the answers

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

<p>To coordinate muscle movements and maintain posture (C)</p> Signup and view all the answers

What is the main function of cranial nerves in the nervous system?

<p>To connect directly to the brain and regulate various bodily functions (B)</p> Signup and view all the answers

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