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E: BIO 107 > Bio107-ch9&10pt1&2 > Flashcards

Bio107-ch9&10pt1&2 Flashcards

0
Q

Functions of muscle (3)

A
  1. Motion/ movement
  2. Maintain posture
  3. Heat production
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1
Q

Characteristics of muscle (4)

A
  1. Excitability- responds to stimuli
  2. Contractibility- able to shorten
  3. Extensibility- stretches when pulled
  4. Elasticity- returns to original shape after movement
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2
Q

Muscle tissue types (3)

A
  1. Skeletal muscle tissue
  2. Cardiac muscle tissue
  3. Smooth muscle tissue
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3
Q

Skeletal muscle tissue (4)

A
  1. Biceps triceps
  2. Voluntary
  3. Striated
  4. Multinucleated
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4
Q

Cardiac muscle tissue (4)

A
  1. Heart
  2. Involuntary
  3. Striated- intercalated discs
  4. Multinucleated
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5
Q

Smooth muscle tissue (4)

A
  1. Around organs, arrector pilli
  2. Involuntary
  3. NO STRIATIONS
  4. ONE nucleus
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6
Q

Agonist

A

Does work

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7
Q

Antagonist

A

Does not do work

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8
Q

Synergistic muscles

A

Muscles that have the same action at a joint

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9
Q

Prime mover- agonist

A

Muscle with the greatest force of contraction or mechanical advantage

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10
Q

Synergists

A

Non Prime movers

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11
Q

Prime movers____ to cause desired action

A

Contract

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12
Q

Antagonists ____ and yield to _____

A

Stretches

Prime mover

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13
Q

Synergists ____ to stabilize nearby joints

A

Contract

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14
Q

Fixators ____ the origin of the prime mover

A

Stabilize

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15
Q

Resistance

A

Weight of a body part or object

16
Q

Effort

A

Work done by muscle contraction

17
Q

Skeletal muscle myofibril image:

1 sacromere =

A

From z disc to z disc

18
Q

Actin

A

Thin filament

19
Q

H zone

A

Down the middle, in between both z discs

Collapses during activity

20
Q

A band

A

Area between both I bands

One end of myosin to the other, contains both actin and myosin

21
Q

Myosin

A

Thick filament

22
Q

M line

A

The middle

23
Q

I band

A

One sacromere to the end of another

Contains actin only

24
Q

Smaller units of skeletal muscle fibers are

A

Myofibrils

25
Q

Thick filament has ____ that move ____

A

Heads

Move up and down back and forth

26
Q

Actin contains (2)

A

Tropomysin and troponin

27
Q

Sarcolemma stores

28
Q

Sarcolemma and T tubules surround

A

The myofibril

29
Q

Sarcoplasmic reticulum

A
  1. Mesh-like
  2. Stores Ca for muscle contraction
  3. Paired terminal cisternae form cross channels
  4. Elongate T tubules allow Ca to flow or be stored
30
Q

Excitation-contraction coupling, also called

A

Sliding filament theory

E: BIO 107 (17 decks)

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