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A&P - Lecture > Lecture 9 > Flashcards

Lecture 9 Flashcards

1
Q

What are the 4 functions of the muscles?

A

1) Movement
2) Stabalization
3) Storage and movement of substances - Heart, GI Tract, etc
4) Heat generation - “Thermogenis”

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2
Q

What is the superficial fascia?

A

Seperates the subQ layer from the muscle

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3
Q

What is the deep fascia?

A

Surrounds multiple muscles with similar functions (ex: quadracepts)

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4
Q

What fascia surrounds one muscle fiber?

A

Endomysium

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5
Q

What fascia creates a facscile?

A

Perimysium

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6
Q

What fascia creates a muscle?

A

Epimysium

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7
Q

What makes up a facscile?

A

Multiple muscle fibers

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8
Q

What makes up a muscle?

A

Multiple fascicles

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9
Q

How many fibers are in a fascile?

A

10-100

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10
Q

What are

myoblasts?

A

Embriotic, immature cell

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11
Q

What is hGH?

A

Human growth Hormone - increases muscle mass

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12
Q

What does testosterone do in the body?

A

Helps to increase muscle.

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13
Q

What is sarcolemma?

A

Cell membrane

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14
Q

What is sarcoplasm?

A

Cytoplasm

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15
Q

What is myoglobin?

A

Protien; holds on to O2 (needed for ATP)

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16
Q

What are myofibrils?

A

Contractile units of muscle fiber

17
Q

What is sarcoplasmic reticulum (SR)

A

Stores calcium ions for contraction

18
Q

Which are the thick and thin filaments?

A

Thick- Myacin

Thin - Actin

19
Q

What is a sarcomere?

A

A section within a myofibril

20
Q

What are the edges of the sarcomere called?

A

Z disks

21
Q

What is the A band int eh sarcomere?

A

Length of the thick filament/myacin

22
Q

what is the I band in the sarcomere?

A

The thin filament/actin only.

23
Q

What is the zone of overlap in the sarcomere?

A

The thick and thin overlap region

24
Q

What is the H Zone in the sarcomere?

A

The thick filament only

25
Q

What is the m line in the sarcomere?

A

The middle line that hold the thick filamnet in place.

26
Q

What are inercalated discs?

A

Where fibers on the cardiac muscle connect.

27
Q

Name 3 facts about cardiac muscle.

A

1) Between contractions the fibers relax completely to prevent fatigue
2) It contracts for longer than skeletal muscles
3) The contraction happens without input from nervous system (can beat sans the brain)

28
Q

Name 2 facts about Smooth muscle.

A

1) Does not fatigue easily

2) Tends to have tone due to small contractions constantly

29
Q

What form sheets of fibers in smooth muscle?

A

Visceral Smooth muscle tissue

30
Q

What are the individual muscel fibers in the smooth muscle?

A

Multiunit smooth muscle tissue

31
Q

How many myasin proteins make up a filament?

A

300

A&P - Lecture (4 decks)

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