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Alle Oberthemen / Medicine / Microanatomy

Microanatomy: Muscle (23 Karten)

Sag Danke
1
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0
What is the embryonic derivation of muscle tissue?
Mesoderm
2
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In the muscle, what is the cell membrane, the cytoplasm, the smooth ER, and the mitochondria called?
Sarcolemma, sarcoplasm, sarcoplasmic reticulum, and sarcosomes.
3
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What are the other names for a muscle cell?
Muscle fiber or myofiber
4
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From what discs does a sarcomere span?
Z-discs
5
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Name the components of a triad.
Two terminal cisternae and a t-tubule.
6
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Why does skeletal muscle have multiple nuclei?
Because the muscle is formed by the fusion of multiple myoblasts.
7
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Name the three types of skeletal muscle fibers.
Red, slow-twitch (type 1)
Intermediate, fast-twitch (type 2A)
White, fast-twitch (Type 2B)
8
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What is the largest protein in the body and what does it do in skeletal muscles?
Titin.  It keeps the muscle from overstretching.
9
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What three components make up thin myofilaments?
Troponin, tropomyosin, and actin.
10
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What does the H-band contain?
Thick myofilaments
11
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What is the I-band?
A band that expands the ends of 2 sarcomeres and lacks thick myofilaments.
12
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What is does the A-band contain?
Thick myofilaments
13
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What happens to the H-band and A-band during a partial contraction?
H-band decreases.
A-Band stays the same.
14
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What happens to the H-zone, I-band, and A-band during full contraction?
H-zone disappears.
I-band narrows.
A-band stays the same.
15
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What are the connective tissues of skeletal muscle?
Endomysium, perimysium, and epimysium
16
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What connective tissue holds together muscle fascicles?
Perimysium
17
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What composes a motor unit?
One alpha motor neuron and all of the muscle fibers it innervates.
18
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What is a motor end-plate?
It is the terminal branching of motor axon. 
19
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What does a muscle spindle do?
It detects the length of a muscle.
20
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How does the cytoplasm of cardiac muscle stain?
Acidophilically 
21
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How do cardiac muscle cells communicate with each other?
Gap Junctions
22
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What are the connective tissue layers in cardiac muscle?
Endomysium
23
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What type of muscle has the most mitochondria?
Cardiac
Kartensatzinfo:
Autor: toncrayb
Oberthema: Medicine
Thema: Microanatomy
Veröffentlicht: 03.11.2009
Tags: Veterinary, medicine, oregon, Muscles
 
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