Chapter 1.2 Flashcards Preview

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Flashcards in Chapter 1.2 Deck (8)
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1
Q

What are the three types of nervous cells

A

-sensory neurons

  • interneurons
  • > located predominantly in the brain and spinal cord
  • > involved in reflex arcs which controls reflexes
  • > by the time info makes it to the brain, the reflex arc has already carried out the action

-motor neurons

2
Q

What is the CNS composed of

A

-the brain and the spinal cord

3
Q

What is the PNS composed of? What is the function of the PNS?

A
  • the nerve tissue and fibers outside of the brain/spinal cord
  • includes 31 pairs of spinal nerves and 12 pairs of cranial nerves
  • the function of the PNS is to connect the CNS to the rest of the body
4
Q

What is the PNS divided into? What two parts

A

-it is divided into the somatic nervous system and the autonomic nervous system

5
Q

What does the somatic nervous system consist of? How does it transmit its information

A
  • it consists of sensory and motor neurons distributed through the joints, muscle and skin
  • sensory neurons transmit information through afferent fibers
  • motor neurons transmit information through efferent fibers
6
Q

What is the autonomic nervous system associated with? What functions does it regulate?Is it involved in regulating body temperature?

A
  • it is associated with functions that involve involuntary organs and glands
  • > this involves glandular secretions, digestion, respiration and heartbeat
  • they are independent of conscious control
  • yes
  • > it regulates body temperature through sweating or piloerection(goosebumbs when cold)
7
Q

What two components are the autonomic nervous system composed of?

A

-it is composed of the sympathetic and the parasympathetic nervous system

8
Q

What is the relationship between the parasympathetic and the sympathetic nervous system. Go over their specific functions on page 9.

A
  • they have an antagonistic relationship
  • the parasympathetic is rest and digest
  • > it conserves energy
  • the sympathetic is fight or flight
  • > activated by stress