Nervous System Components and Divisions Quiz
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Questions and Answers

What are the two components of the central nervous system?

  • Cerebellum and thalamus
  • Brain and spinal cord (correct)
  • Dendrites and axons
  • Motor and sensory neurons

Into what two pathways can the peripheral nervous system be further divided?

  • Dendritic and axonal pathways
  • Sympathetic and parasympathetic pathways
  • Motor and sensory pathways
  • Somatic and autonomic pathways (correct)

What is the function of the myelin sheath?

  • To provide structural support to the neuron
  • To transmit electrical signals between neurons (correct)
  • To store energy for neuronal activities
  • To regulate neurotransmitter release

Differentiate between white matter and grey matter.

<p>Grey matter contains cell bodies while white matter contains myelinated axons. (C)</p> Signup and view all the answers

What is a reflex arc?

<p>A sequence of events that leads to an involuntary response to a stimulus. (A)</p> Signup and view all the answers

What is the threshold level?

<p>The minimum level of depolarization required to trigger an action potential. (B)</p> Signup and view all the answers

During depolarization, what is happening at the axon membrane?

<p>Potassium ions are entering the cell (C)</p> Signup and view all the answers

What occurs at the synapse?

<p>Release of neurotransmitters (B)</p> Signup and view all the answers

What is acetylcholine?

<p>A neurotransmitter (D)</p> Signup and view all the answers

What is the refractory period?

<p>The period of time when a neuron cannot generate another action potential (A)</p> Signup and view all the answers

Name two positive feedback loops related to the female body.

<p>Breast milk production and labor contractions (A)</p> Signup and view all the answers

Define steroid hormones and provide an example.

<p>Hormones derived from cholesterol; estrogen (A)</p> Signup and view all the answers

What does the undersecretion of hGH lead to?

<p>Dwarfism in children and osteoporosis in adults (B)</p> Signup and view all the answers

Which hormones regulate blood calcium levels?

<p>Parathyroid hormone (PTH) and calcitonin (B)</p> Signup and view all the answers

What is the purpose of insulin, and what are its targets?

<p>To decrease blood sugar levels; liver and muscles (B)</p> Signup and view all the answers

For which hormone is the stimulus LOW GRADE stress, injury, or exercise?

<p>Adrenaline; produced by the adrenal cortex (D)</p> Signup and view all the answers

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