Anatomy Part #1

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<p>Muscle fiber (red)</p>

Muscle fiber (red)

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Description and Tags

(Neuromuscular Junction)(Major Muscle)(Skeletal Muscle)

64 Terms

1
<p>Muscle fiber (red)</p>

Muscle fiber (red)

elongated multi nucleate cell; has a banded (striated) appearance

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2
<p>Endomysium (between fibers) #6</p>

Endomysium (between fibers) #6

Individual muscle fiber is surrounded by a fine sheath of connective tissue consisting of areolar and reticular fibers.

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3
<p>Fascicle (purple)</p>

Fascicle (purple)

bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath (perimysium)

<p>bundle of muscle cells, segregated from the rest of the muscle by a connective tissue sheath (perimysium)</p>
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4
<p>Perimysium #2</p>

Perimysium #2

Surrounding each fascicle is a layer of fibrous connective tissue

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5
<p>Epimysium #3</p>

Epimysium #3

An “overcoat“ of dense irregular connective tissue surrounds the whole muscle.

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6

epi-

outside

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7

-mysium

muscle

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8

peri-

around

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9
<p>What is this muscle?</p>

What is this muscle?

Temporalis

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10
<p>What is purple muscle called?</p>

What is purple muscle called?

Orbicularis Oculi

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11
<p>What is the blue muscle called?</p>

What is the blue muscle called?

Zygomaticus

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12
<p>What is the green muscle called?</p>

What is the green muscle called?

Orbicularis Oris

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13
<p>What is #5 muscle called?</p>

What is #5 muscle called?

Epicranius, frontal belly

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14
<p>What is #6 muscle called?</p>

What is #6 muscle called?

Masseter

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15
<p>#7?</p>

#7?

Sternocleidomastoid

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16
<p>What is #8?</p>

What is #8?

Pectoralis Major

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17
<p>What is #9?</p>

What is #9?

Deltoid

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18
<p>What is #10?</p>

What is #10?

Biceps Brachii

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19
<p>What is #11?</p>

What is #11?

Rectus abdominis

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20
<p>What is #12?</p>

What is #12?

Internal oblique

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21
<p>What is #13?</p>

What is #13?

Adductor Longus

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22
<p>What is #14?</p>

What is #14?

Gracilis

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23
<p>What is #15?</p>

What is #15?

Sartorius

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24
<p>What is #16?</p>

What is #16?

Tiblias Anterior

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25
<p>What is #17?</p>

What is #17?

Gastrocnemius

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26
<p>What is #18?</p>

What is #18?

external oblique

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27
<p>What is #19?</p>

What is #19?

Tensor Fasciae latae

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28
<p>What is #20?</p>

What is #20?

Rectus Femoris

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29
<p>What is #21?</p>

What is #21?

Vastus Lateralis

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30
<p>What is #22?</p>

What is #22?

Vastus medialis

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31
<p>1st Event at the NMJ?</p>

1st Event at the NMJ?

AP travels the link down the neuron to the axon terminal.

<p><strong>AP travels the link down the neuron to the axon terminal.</strong></p>
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32

NMJ Step 2:

Voltage-gated calcium channels open and calcium ions diffuse into the terminal.

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33

NMJ Step 3:

Calcium entry causes synaptic vesicles to release acetylcholine via exocytosis

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34

NMJ Step 4:

AcH diffuses across the synaptic cleft and vines to the AcH receptors which contain Ligand-gated cation channels

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35

NMJ Step 5:

These ligand-gated cation channels open

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36

NMJ Step 6:

Sodium ions enter the muscle fiber potassium ions exit the muscle fiber. The greater end of flux causes the membrane potential to become less negative.

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37

NMJ Step 7:

Once the membrane potential reaches its threshold value an Action potential (AP )propagates against the sarcolemma

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38

Neuromuscular Junction

area where the axon terminal of a motor neuron meets a motor end plate of a muscle fiber

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39
<p>#1?</p>

#1?

Triceps Brachii

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40
<p>#2?</p>

#2?

Brachialis

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41
<p>#3?</p>

#3?

Brachioradialis

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42
<p>#4?</p>

#4?

Extensor carpi radialis longus

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43
<p>#5?</p>

#5?

Flexor carpi ulnaris

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44
<p>#6?</p>

#6?

Extensor carpi ulnaris

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45
<p>#7?</p>

#7?

Extensor digitorum

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46
<p>#8?</p>

#8?

Iliotibial tract

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47
<p>#9?</p>

#9?

Gastrocnemius

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48
<p>#10?</p>

#10?

Soleus

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49
<p>#11?</p>

#11?

Fibularis Longus

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50
<p># 12?</p>

# 12?

Calcaneal (Achilles Tendon)

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51
<p>#13?</p>

#13?

Epicranius, occipital belly

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52
<p>#14?</p>

#14?

Sternocleidomastoid

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53
<p># 15?</p>

# 15?

Trapezius

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54
<p>#16 ?</p>

#16 ?

Deltoid

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55
<p>#17?</p>

#17?

Infraspinatus

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56
<p>#18?</p>

#18?

Teres Major

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57
<p>#19?</p>

#19?

Rhomboid Major

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58
<p>#20?</p>

#20?

Latissimus Dorsi

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59
<p>#21</p>

#21

Gluteus Medius

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60
<p>#22?</p>

#22?

Gluteus Maximus

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61
<p>#23?</p>

#23?

Adductor magnus

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62
<p>#24?</p>

#24?

Biceps Femoris

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63
<p>#25</p>

#25

Semitendinosus

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64
<p>#26?</p>

#26?

Semimembraneous

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