Test 2 practice questions (old) Flashcards Preview

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Flashcards in Test 2 practice questions (old) Deck (69):
1

A bundle of fibers that form a specific tract may also be called a ___

fasciculus

2

In general, ganglia are found in the ___, while groups of neurons in the __ are called nuclei.

PNS
CNS

3

Which region of neural plate forms PNS?

Neural crest

4

Filum terminale is remnant of what structure?

Pia Mater

5

Somatosensory cortex is located in the ___ gyrus

postcentral

6

Motor neurons within the ventral horns are examples of __ type neurons

Multipolar

7

Connection between most neurons in the mammalian NS is?

Synapse

8

Which axons leave spinal cord in the ventral root?

Somatic Motor

9

How many neurons participate in a stretch reflex such as the knee jerk reflex?

2

10

Alpha motor neurons innervate....

Extrafusal motor fibers

11

Matching: Match neuron type with location. Options are Unipolar (pseudounipolar), Bipolar, Multipolar

Spinal Ganglion
Vestibular Ganglion
Outer pyramidal layer of cortex
DRG
Inner granule layer of cortex

Multipolar
Bipolar
Multipolar
Unipolar (pseudounipolar)
Multipolar

12

What structure(s) end at vertebral level S2?

Filum Terminale
Dural Sac

13

Where does conus medularis end?

2nd Lumbar

14

Most common type of synapse

Axodendritic

15

What is a tract?

Bundle of fibers in the CNS

16

What CN exits the brainstem between the olive and pyramid?

Hypoglossal

17

T/F Neurotransmitters reach terminal ends of axon by anterograde transport

True

18

Which does not make up a part of coccygeal ligament?

Grey matter

19

Dentate ligament is made up of...

Pia Mater

20

The following structure belongs to metencephalon...

Facial colliculus

21

Inf. cerebellar peduncle attaches the __ to the cerebellum.

Medulla

22

The cauda equina is...

Lumbar and sacral roots extending inferior to the end of the cord.

23

What connects broca's to wernicke's area?

Arcuate association fibers

24

What Artery runs in lat. fissure?

Middle Cerebral

25

What Artery supplies Lateral brain?

Middle Cerebral

26

What artery supplies visual cortex?

Posterior Cerebral

27

What lobe contains visual cortex?

Occipital

28

What deep vein goes to the straight sinus?

Great cerebral vein of galen

29

Territory from which a sensory unit can be excited is known as...

Receptive field

30

Receptors that respond to stimuli from the internal environment are known as...

Interoreceptors

31

Aging on motor units results in??

Loss of motor neurons from the cord and stem

32

FIbers cross where in the medulla?

Internal arcuate fibers

33

The reticular formation is located where?

In the tegmentum of the midbrain, pons, and medulla

34

What do primary afferent sensory receptors measure?

Rate of stretch

35

What do secondary afferent sensory receptors measure?

How long stretch lasts

36

What are specialized epithelial cells that act as touch receptors?

Merkel disc

37

What artery supplies visual cortex?

Posterior Cerebral

38

Where do fibers originate that form the gracile fasciculus?

Upper half of spinal cord

39

Nuclear bag fibers receive ___ and ___ fibers

Ia primary afferent
Group II afferent

40

There are __ pairs of spinal nerves in the spinal cord.

31

41

Corticospinal tract descends in the ___ limb of the internal capsule and is originated in the __ cortex

Posterior/ motor

42

In the spinal cord, the marginal zone mainly consists of fibers and ___.

Mature cells

43

Which tract releases serotonin at the spinal cord level?

Raphe spinal

44

Unconscious proprioceptive fibers of fasciculus cuneus terminate in the ___ nucleus

Accessory cuneate

45

The ___ tract is concerned with intersegmental spinal reflexes.

Fasciculus Proper

46

The origin or rubrospinal tract is located in the red nucleus of the ___

Midbrain

47

The ___ tract originates in the Sup. Colliculus

Tectospinal

48

What structure gives rise to lateral corticospinal tract?

Pyramidal decussation

49

The spinal lemniscus (Spinothalamic Tract) is concerned with ___ functional components

GSA

50

Which tract decussates in the midbrain?

Ventral spinocerebellar

51

Involuntary motor control tracts terminate mainly in which lamina?

7, 8, some of 9

52

Which nuclei is part of auditory pathway?

Inf. Colliculus

53

ANterior horn consists of Rexed lamina or laminae ___

IX

54

Which vessel supplies the majority of the lateral side of cerebrum?

Middle Cerebral

55

which cerebellar nucleus is biggest in humans?

Dentate

56

Where are postganglionic sympathetic bodies located?

Near target organ

57

Which system cant be mapped in the brain?

Olfactory

58

Which CN has four nuclei in the brain?

VIII

59

WHich artery is biggest branch off of internal carotid artery?

Middle cerebral

60

AT which level does the pathway for pain and temperature sensation for the lower limbs cross the midline?

lumbosacral spinal cord

61

The circuit for explained emotion is the __ and is involved with the limbic system

Papez circuit

62

SPinal cord segments that form the cervical enlargement

C5-T1

63

___ nucleus is necessary for pupillary light reflex

Pretectal

64

What NT causes inhibition in the motor circuit of the cortex?

GABA

65

Which NT causes excitation in motor nucleus of cortex?

Glumatime

66

Purkinje cell is primarily __ in function

Inhibitory

67

Mossy cell fibers are primarily __ in function

Excitatory

68

Spinocerebellum controls ___ type movement

Gross

69

Pontocerebellum controls ___ type movements

FIne