Intro to Muscles

Question 1

What are the 3 types of muscles?

Answer 1

Skeletal, Cardiac, Smooth

Question 2

Skeletal Muscle

Answer 2

pulls on bones of skeleton

Striated, voluntary

Question 3

Cardiac Muscle

Answer 3

pushes blood through circulatory system

Striated, involuntary

Question 4

Smooth Muscle

Answer 4

pushes fluids and solids along the digestive tract and regulates the diabetes of small arteries

NON-striated, involuntary

Question 5

What are the 4 tissue properties of skeletal muscle?

Answer 5

1. Contractibility
   - -muscle cells can shorten
2. Excitability
   - -very responsive
3. Extensibility
   - -can increase in length
4. Elasticity
   - -able to return to original length

Question 6

What are the 5 functions of skeletal muscle?

Answer 6

1. produce movement
2. maintain posture
3. support
4. generate heat
5. storage and movement of materials

Question 7

Skeletal Muscle

Answer 7

Mostly skeletal muscle tissue, but also contain CT, nerves, and blood vessels

Question 8

Subdivisions of Skeletal Muscle

Answer 8

Muscle is composed of multiple fascicles in which are composed of individual fibers

Question 9

CT Membranes: Epimysium, Perimysium, Endomysium

Answer 9

Epimysium: surrounds entire “muscle,” separates muscle from surrounding tissues and organs
–most superficial

Perimysium: surrounds each fascicle, divides skeletal muscle into compartments
–in between epimysium and endomysium

Endomysium: surrounds muscle fibers w/in a fascicle
–most deep

Question 10

Muscle Attachments: Tendons and Aponeurosis

Answer 10

Tendon: muscle to bone
Aponeurosis: flat sheet of tendon

Question 11

Origins and Insertions

Answer 11

Muscles cross at least one joint. Locations where these muscles attach are called origins or insertions.

Origin: proximal attachment/bone fixed
Insertion: distal attachment/bone mobile