Human Brain Structure and Functions
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Questions and Answers

Which of the following structures is responsible for forming a barrier that prevents certain substances from entering the brain?

  • Blood Brain Barrier (correct)
  • Dura mater
  • Arachnoid mater
  • Pia mater

    • What is the primary function of cerebrospinal fluid?

  • To nourish the brain
  • To act as a shock absorber (correct)
  • To filter out waste products from the brain
  • To protect the brain from injury

    • Which of the following is a characteristic of the Blood Brain Barrier?

  • Low concentration of sodium
  • Low concentration of potassium
  • High concentration of potassium
  • High concentration of sodium (correct)

    • What is the function of the choroid plexus in the formation of cerebrospinal fluid?

    <p>To produce CSF as a filtrate</p> Signup and view all the answers

    What is the purpose of the tight junctions formed by astrocyte processes in the Blood Brain Barrier?

    <p>To form a barrier that prevents certain substances from entering the brain</p> Signup and view all the answers

    What is the requirement for a drug to cross the Blood Brain Barrier?

    <p>The drug must be lipid-soluble</p> Signup and view all the answers

    What is the primary function of the frontal lobe in voluntary motor activity?

    <p>Executing motor commands onto the spinal cord</p> Signup and view all the answers

    What is the main difference between the thin gray matter and the thick white matter in the cerebral cortex?

    <p>The gray matter is composed of neuron cell bodies and dendrites, while the white matter is composed of myelinated axons</p> Signup and view all the answers

    Which region is responsible for integrating somatic, visual, and auditory sensations from the parietal, occipital, and temporal lobes?

    <p>Partial Temporal Occipital association cortex</p> Signup and view all the answers

    What is the function of the corpus callosum in the brain?

    <p>Connecting the left and right cerebral hemispheres</p> Signup and view all the answers

    Which of the following is NOT a function of the prefrontal association cortex?

    <p>Language comprehension</p> Signup and view all the answers

    What is the primary function of the cerebellum?

    <p>Coordinates skilled voluntary movement</p> Signup and view all the answers

    What type of memories are stored in the cerebellum?

    <p>Procedural memories</p> Signup and view all the answers

    What is the function of the reticular activating system (RAS) in the brain stem?

    <p>Regulates sleep and wakefulness</p> Signup and view all the answers

    What is the site of the spinal tap and epidural procedures?

    <p>Cauda equina region</p> Signup and view all the answers

    How many pairs of nerves exit and enter the vertebral column?

    <p>31 pairs</p> Signup and view all the answers

    What is the approximate length and diameter of the spinal cord?

    <p>45 cm long / 2cm in diameter</p> Signup and view all the answers

    What is the primary function of the amygdala in the limbic system?

    <p>Mediating fear responses and emotional regulation</p> Signup and view all the answers

    What neurotransmitters are involved in the reward and punishment centers of the limbic system?

    <p>Dopamine, norepinephrine, and serotonin</p> Signup and view all the answers

    What is the result of decreased neurotransmitters in the limbic system?

    <p>Decreased emotional regulation and depression</p> Signup and view all the answers

    What is the role of the hippocampus in the limbic system?

    <p>Forming and consolidating new memories</p> Signup and view all the answers

    What is the result of an overactive limbic system?

    <p>Psychosis and altered perception</p> Signup and view all the answers

    What is the function of the hypothalamus in the limbic system?

    <p>Maintaining homeostasis and regulating body temperature</p> Signup and view all the answers

    What is the primary function of the basal nuclei?

    <p>Inhibition and suppression of movement</p> Signup and view all the answers

    Which part of the brain is responsible for the regulation of body temperature?

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

    What is the primary function of the cerebellum?

    <p>Balance and coordination</p> Signup and view all the answers

    Which part of the brain is responsible for the control of involuntary systems?

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

    What is the primary function of the thalamus?

    <p>Relay station for synaptic input</p> Signup and view all the answers

    Which part of the brain is responsible for crude awareness of sensation?

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

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