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Bio 12 > Nervous System > Flashcards

Nervous System Flashcards

1
Q

What are the 3 types of neurons?

A
  • Sensory neuron
  • Interneuron
  • Motor neuron
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2
Q

What is the fibre length of a SENSORY neuron?

A
  • Long dendrites
  • Short axon
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3
Q

What is the fibre length of a MOTOR neuron?

A
  • Short dendrites
  • Long axon
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4
Q

What is the fibre length of a INTERneuron?

A
  • Short dendrite
  • Long or short axon
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5
Q

Where are sensory neurons located?

A

its cell body and dendrites are outside the spinal cord
(more specifically, the cell body is in the dorsal root ganglion)

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6
Q

Where are motor neurons located?

A

its cell body and dendrites are inside the spinal cord, axon is outside the spine

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7
Q

Where are interneurons located?

A

entirely in the spinal cord (only in CNS)

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8
Q

What’s the function of a sensory neuron?

A

conducts impulses to the spinal cord

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9
Q

What’s the function of a motor neuron?

A

connects the sensory and motor neurons

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10
Q

What’s the function of an motorneuron?

A

conducts an impulse to the effector (muscle or gland cell)

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11
Q

What is the function of the hindbrain?

A

functions in homestasis, movement coordination, and conducting info to the brain

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12
Q

What are the 3 sections the brain is divided into?

A
  • Forebrain
  • Midbrain
  • Hindbrain
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13
Q

What is the function of the medulla oblongata?

A

Controls lots of homeostatic functions
(like breathing, heart/blood vessel activity, swallowing, vomiting, and digestion)

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14
Q

What is the function of the cerebellum?

A

Coordinates body movement
Receives muscle/joint info, and visual and auditory info

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15
Q

What is the function of the cerebrum?

A

Center for processing info and responding to it

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16
Q

What is the function of the corpus callosum?

A

nerve fibre bridge that divides the 2 hemispheres

17
Q

What is the function of the thalamus?

A

Input center for…
- sensory info going to cerebrum
- motor info leaving the brain

18
Q

What is the function of the hypothalamus?

A

Regulates appetite, thirst, body temp, and sleep
Homeostatic control
Controls Autonomic NS
Initiates endocrine responses when needed

19
Q

Somatic Nervous System

A
  • sends signals to skeletal muscles
  • “voluntary”
20
Q

Autonomic Nervous System

A
  • maintains internal environment by controlling specific muscles and organs
  • “involuntary”
  • controls “fight or flight” response
21
Q

Sympathetic Nervous System

A
  • the “fight or flight” system
  • controls energy building
22
Q

Parasympathetic Nervous System

A
  • rest and digest system
  • calms body down

Bio 12 (1 decks)

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