Lab

Question 1

Dendrite

Answer 1

Form synapses or detect stimuli and are adapted to generate graded potentials toward cell body and axon hillock

Question 2

Axon hillock

Answer 2

Trigger zone and first part of axon

Question 3

Where are Na channels found?

Answer 3

Axon hillock, initiate action potential at threshold

Question 4

Myelin

Answer 4

Phospholipid and protein layer around axons that ↑ the speed of action potentials

Question 5

Schwann cell

Answer 5

Glial cells responsible for forming myelin sheath n PNS

Question 6

Node of ranger

Answer 6

Gaps in myelin sheath that allow Lons to enter and exit the axon and propagate ap

Question 7

Collateral axon

Answer 7

Major branch of axon that can deliver the AP to different target cells

Question 8

Axon terminal/ synaptic knob

Answer 8

Last structure of axon that contains neurotransmitters that will be released to communicate W / target cell

Question 9

Vescides

Answer 9

Store nuerot, and release them into synaptic cleft when stimulated

Question 10

Unipolar neuron

Answer 10

I process, sensory

Question 11

Unipolar location

Answer 11

Nuclei, PNS, CNS. Dorsal root ganglion, cranial gangland

Question 12

Bipolar

Answer 12

Sensory,2 processes

Question 13

Bipolar location

Answer 13

PNS, sensory path

Question 14

Multipolar

Answer 14

Many processes, integration and motor

Question 15

Multipolar location

Answer 15

PNS, CNS, autonomic ganglia

Question 16

Myelin is made up of the membranes of

Answer 16

Schwann cans in DNS and ologodendrites in CNS

Question 17

What carries impulses away from the cell body of neuron?

Answer 17

Axons

Question 18

What neurons can be found in retina of the eye?

Answer 18

Bipolar

Question 19

Schwann cells are only found in

Answer 19

Peripheral nervous system

Question 20

Myelin_ conduction velocity

Answer 20

↑

Question 21

The ‘blank’ is an interruption in myelin sheath which enhances conduction velocity by allowing saltatory conduction

Answer 21

Node of ranker

Question 22

Membranes and therefore myelin are made of and

Answer 22

Phospholipids and protein

Question 23

Cluster of cell bodies in CNS

Answer 23

Nuclei

Question 24

Cluster of cell bodies in PNS

Answer 24

Ganglia

Question 25

What de nisei bodies responsible for?

Answer 25

Synthesis of proteins

Question 26

outer membrane of axon

Answer 26

Axolemna

Question 27

Function of Schwann cells

Answer 27

. Allow neurons to form multiple synapses

Question 28

How do ions move in and out of cells?

Answer 28

Protein channels or pumps

Question 29

What is an ion channel?

Answer 29

Protein that allows ions to diffuse through membrane

Question 30

What factors determine in which direction ions will move through an open channel?

Answer 30

Ion concentration and charge

Question 31

What two factors contribute to the existence of a resting membrane potential?

Answer 31

Diffusion and pumping of Na and k ions

Question 32

Where would you find the ion channels on ligand gated? '

Answer 32

Soma and dendrites

Question 33

Where on Na gated channels would you and?

Answer 33

Axon

Question 34

Small positive change in RMP but not great enough to result in AP

Answer 34

EPSP

Question 35

Post synaptic membrane had small regions of hyperpolarization, these local occurrences of hyperpolarization would be called _

Answer 35

IPSP

Question 36

Result of calcium influx

Answer 36

Neurotic. Released into synaptic deft via exocytesis

Question 37

Synaptic vesicles

Answer 37

Store and transport neurot

Question 38

Ventral hom

Answer 38

Grey matter, contains call bodies of lower motor neurons

Question 39

Dorsal horn

Answer 39

Gray matter, contains sensory

Question 40

Lateral horn

Answer 40

Regulate autonomic nervous system

Question 41

Difference between gray horns and white columns is

Answer 41

Gray horns an composed of gray matter

Question 42

Central canal is lived by _cells

Answer 42

Ependymal

Question 43

Sub arachnoid space contalhs

Answer 43

CSF

Question 44

White columns carry impulses along pathways called ?

Answer 44

Tracts

Question 45

Info carried along tracts is either

Answer 45

Sensory ur motor

Question 46

Olgedendroohtes found in?

Answer 46

White matter or columns

Question 47

A lumbar puncture would remove fluid from what space

Answer 47

Subarachnoid space

Question 48

What produces CSF?

Answer 48

Chorale plexus, produced through active ion, transport, which results in secretion of sodium and chloride Lons

Question 49

Composition of CSF

Answer 49

Glucose, proteins, lipids, electrolytes

Question 50

What structure 'absorbs' the CSF back into circulatory system?

Answer 50

Arachhold granulations carachnold vile)

Question 51

Hydrocephalus

Answer 51

CSF is produced but does not drain efficiently

Question 52

Lumbar puncture

Answer 52

Allow samples of CSF to diagnose

Question 53

Basal nuclei

Answer 53

Gray matter w/in cerebrum; caudate, putanan, globus pallidus

Question 54

Function of basal nuclei

Answer 54

Moderate movement; determine actions based on intentions and personality

Question 55

Insult

Answer 55

Self awareness and sensations, behavior and cravings

Question 56

① depolarization (rising phase)

Answer 56

Rising phase, membrane potential rapidly becomes more + due to opening of voltage gated Na, allowing Na into the cell

Question 57

② depolarization (failing phase)

Answer 57

Membrane potential returns to resting state due to closing of sodium channels and opening of potassium channels, allowing K to flow out of the cell

Question 58

Threshold potential

Answer 58

Certain level of depolarization must be reached threshold potential to trigger an action potential

Question 59

Refectory period

Answer 59

After action potential, brief period where neuron cannot fire another action potential, ensures unidirectional signal propagation

Question 60

Hyperpolarization

Answer 60

Membrane potential becomes more negative, opposite of depolarization. Makes it more difficult to move membrane potential to action potential threshold, Inhibiting action potentials

Question 61

Resting membrane potential

Answer 61

Electrical potential difference across cell's plasma membrane when the cell is at rest

Question 62

Thalamus

Answer 62

Receives and directs sensory signals from body to appropriate areas of cerebral cortex, play a role in consciousness, sleep, and motorfunc.

Question 63

Hypothalamus

Answer 63

Controls vital bodily functions like temp., hunger, thirst, blood pressure, primary link between nervous and endocrine system

Question 64

Epithalamus

Answer 64

Contains pineal gland, which produces melatonin