Intro to Muscle

Question 1

How many muscles type
Myology

Answer 1

Skeletal
Cardiac
Smooth

Question 2

Skeletal muscle

Answer 2

Striated, multinuclear
Voluntary and usually attached to skeleton
Muscle fiber or myofiber

Question 3

Smooth muscle

Answer 3

non-striated, spindle-shaped and uninuclear
Involuntary and covers walls of internal organs

Question 4

Cardiac muscle

Answer 4

Striated, branched and uninuclear
Involuntary and only covers the heart.

Question 5

5 functions of muscles

Answer 5

Movement- body parts, contents and communication
Stability- Maintain posture and gravity pull
Controls body openings and passages
Heat production needed for enzyme function
Glycemic control- absorb, store and use glucose.

Question 6

5 muscle properties

Answer 6

Excitability- react to stimuli
Conductivity- spreading electrical impulses through muscle cell
Contractility- shorten when stimulated
Extensibility- can stretch without harm
Elasticity- can recoil from stretch

Question 7

Muscle conductivity

Answer 7

Skeletal muscles has nerve impulses that stimulates the signal
Smooth muscles rhythm increase or decrease of Na+ into the cell

Question 8

Cardiac muscle

Answer 8

Contract through the electrical signal at the SA node that spreads through the AV node

Question 9

Myofilaments- protein filaments of muscle cells

Answer 9

Myosin- heads project from bundled tails of hundreds of molecules
Actin- Fibrous actin that resembles necklace
Globular actin that resembles one bead of necklace and its active site is where myosin binds

Question 10

Muscle fibers

Answer 10

Sarcolemma- transverse tubules
Sarcoplasm- myofibrils, glycogen and myoglobin