Lecture notes

Nerve Cell Function - Study Notes

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Module
Dietetics (DIET501)

Institution
Plymouth University (UOP)

This contains an annotated nerve cell diagram discussing the different parts functions, action potential and is written on goodnotes.

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Uploaded on April 21, 2023
Number of pages 1
Written in 2022/2023
Type Lecture notes
Professor(s) Raul bescos
Contains All classes

Alliyah14 Member since 2 year 1 documents sold

Nerve cells operate by sending
←
NERVE CELL FUNCTION
impulses ( called action potential) from the cell
electrical
body to nerve terminals This allows
.

body
' '
NEURON CLASSES communication between neurons ,
where the response travels through the .

Afferent from tissues / organs outside of CN5
neurons : to central nervous
system . Cell
body
Interneurons within and its within CN5
: connects neurons the CNS ,
entirely the .

and dendrites CN5
Efferent neurons :
Away from CN5 to effector organs Cell .

body are within the .

MYELINATED NEUROTRANSMITTER Myelin sheath provides insulation to
MICROTUBULE
NERVE CELL NEURO FIBRILS prevent current passing through axon

DENDRITES
DIAGRAM .
synapse aswell as
speeding up the

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SYNAPTIC
conduct " potential

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vesicles ' " """ .

AXONAL TERMINAL

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POLY RIBOSOMES 1
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-

NUCLEOLUS
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NUCLEUS CLEFT
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RANVIER
OF

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ON HILLOCK

RIBOSOMES MYELIN SHEATH

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:

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MITOCHONDRIA

INITIATION OF
;gTB•7_4%¥¥&¥É→%⇐*¥¥¥i AX0N
-

MICROTUBULE

Local lidocaine inhibit
ACTION POTENTIAL SMOOTH ER anaesthetics such as voltage
•
threshold gated sodium channels and
Nerve cells have a
reversibly block nerve

level of depolarisation to
trigger AP impulse generation This prevents the
-

necessary . .

•
Causes sensation of brain
pain from reaching the .

Opening sensitive Nat and Kt channels NEUROTRANSMITTERS
-

of voltage .

Nat enters cell due to electrical gradient secreted
•
+ concentration A chemical substance
.

by
Kt moves out due to cone
grad hampered by grad used
•
but electric neurons to transmit
, .

messages
•
Not enters the channel closes
slowly . then

Kt
grads
•
exit now due to both ,
so potential drops .

?⃝

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