Muscle Structure

Question 1

What is a more realistic protein ratio then the USDA’s 4:1 moisture:protein ratio?

Answer 1

• 3.5 moisture:1 protein

- Means we can add water up to a 4:1 ratio

Question 2

Describe skeletal muscle.

Answer 2

Skeletal Muscle

• Striated
• Non-branching
• Attached to bone (direct or indirect)
• Voluntary nervous control

Question 3

Describe cardiac muscle.

Answer 3

Cardiac Muscle

• Striated
• Branching fibers
• Intercalated discs
  
  • Unique to cardiac
  • Transduction
• Involuntary nervous and endocrine control

Question 4

Describe smooth muscle.

Answer 4

Smooth Muscle
* Non-striated
* Same contractile mechanism, but different
organization
* Branching fibers
* Involuntary nervous, endocrine, and mechanical control

Question 5

What connective tissue surrounds the muscle fiber and is composed of a collagen chicken-wire mesh?

Answer 5

Endomysium

Question 6

What connective tissue surrounds bundles of muscle fibers and is composed of collagen pentafibrils?

Answer 6

Perimysium

Question 7

What connective tissue surrounds the whole muscle and is composed of collage pentafibrils?

Answer 7

Epimysium

Question 8

What are the thick and thin filaments each composed of?

Answer 8

Thick - myosin

Thin - actin

Question 9

When contraction occurs __________ move closer together?

Answer 9

When contraction occurs __z-lines__ move closer together?