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BIO 301 Lec > Lab week 9 (exam 3) > Flashcards

Lab week 9 (exam 3) Flashcards

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Biology 101 flashcards
1
Q

What is white matter?

A

White because it contains myelinated tractways

Darker than gray matter

Is around butterfly

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2
Q

What is gray matter?

A

Has cell bodies in it

Lighter color than white matter

Neuron bodies give gray color

In butterfly and purple dots are neurons

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3
Q

What does ganglion (pl. ganglia) mean?

A

Thickening of the nerve

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4
Q

Where do Incoming sensory signals (afferent) come from?

A

Dorsal root

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5
Q

Where does outcoming (efferent) motor signals come from?

A

Ventral root

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6
Q

What are sensory neurons?

A

Very long nerves

Unipolar

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7
Q

What do receptors connect to?

A

Unipolar neuron

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8
Q

What is an interneuron?

A

Connects neurons like a circuit

Multipolar

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9
Q

What is a synapse?

A

Connection between 2 nerve cells

Transport signals to each nerve cell

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10
Q

What is the reflex arc?

A
  • Receptor that sets this off
  • Sensory neurons bring to CNS
  • Interneuron connected to motor neurons
  • Motor neurons pick up signal and act on it

Happens quickly and not even thought about

Ex: knee jerk

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11
Q

What are the nerves found going in the dorsal root gonglia?

A

Unipolar sensory

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12
Q

What are the nerves that come out of the dorsal root ganglia?

A

Multipolar motor

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13
Q

What is epineurium?

A

CT around many bundles of schwanns cells

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14
Q

What is perineurium?

A

Each bundle of processes of schwanns cells is sourrounded by CT

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15
Q

What is endoneurium?

A

CT wrapping of mylin sheath of individual of schwanns cells

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16
Q

What are fasciculus?

A

Bunch of schwanns cells in a bundle

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17
Q

Are motor neurons multipolar, bipolar or unipolar?

A

Multipolar

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18
Q

What are cranial nerves?

A

Spinal nerves coming out of the brain

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19
Q

What do sensory nerves do?

A

Feeding in (afferent) CNS

20
Q

What do motor nerves cause?

A

Causes some action in the body

21
Q

What are mixed nerves?

A

Carrying both sensory and motor nerves

22
Q

What are receptors?

A

Sensor built in body and sensory nerves are connected to them

23
Q

Where do afferent (sensory) nerve fibers go?

A

Going into CNS

24
Q

What is the reflex/ integration (CNS) center?

A

Automatic quick responses

25
Q

Where do the efferent (motor) nerve fiber go?

A

Coming out of CNS

26
Q

What are the effectors (muscle/ gland)?

A

Thing that causes the effect

Whatever is responding to a command

27
Q

What is the location of the spinal cord?

A

Starts at foramen magnum and ends by L1/ L2

Posterior housed in vertebral canal

28
Q

What is the anterior median fissure?

A

Crack between spinal cord

29
Q

What is the posterior sulcus?

A

On top of fissure

30
Q

What is the gray commissure?

A

Signals cross from right to left of butterfly (the bridge)

31
Q

What is the central canal?

A

While on bridge of the butterfly

32
Q

What is the dorsal horn?

A

Top right and left of the butterfly

33
Q

What is the lateral horn?

A

Middle horn rig and left of the butterfly

34
Q

What is the ventral horn?

A

Bottom right and left of the butterfly

No Cell bodies in here that’s why there is no ganglion in this root

35
Q

What is the spinal nerve?

A

Nerve coming out of intervertebral foramen on the right and left

36
Q

What is the dorsal root?

A

Top root

Unipolar sensory neurons

37
Q

What is the ventral root?

A

Bottom root

Multipolar motor neurons

38
Q

What are the meninges?

A

Tough CT that covers CNS

39
Q

What is the epidural space?

A

In vertebrael canal dura matter is separated from bone by a cavity

40
Q

What is dura matter?

A

On the outside

Outermost and tough fibrous membrane that attaches to the bones of the cranium

41
Q

What is the arachnoid matter?

A

2nd layer

Layer below dura matter

42
Q

What is the subarachnoid space?

A

Space below arachnoid matter

43
Q

What is the pia matter?

A

Inside layer

Layer directly on spinal cord

44
Q

What are spinal nerves?

A

Attached to the spine

Projects out between the intervertebrael foramen

45
Q

What is the dorsal root ganglion?

A

Lot of neurons in this location make it thick

BIO 301 Lec (27 decks)

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