Lecture 13: Muscular System

Question 0

Cardiac muscle

Answer 0

Involuntary
Branched fibers
Striations

Question 1

Skeletal muscle

Answer 1

Voluntary
Single fiber
Long, cylindrical cell with striations

Question 2

Smooth muscle

Answer 2

Involuntary
Single
Fusiform
No striations

Question 3

Muscle functions

Answer 3

Movement: allow contractions
Stabilization: along with bones oppose gravity
Storage/movement of substances
Thermogenesis: shivering

Question 4

Superficial fascia

Answer 4

CT separating muscle from subcutaneous layer

Question 5

Deep fascia

Answer 5

Surrounds muscle with similar functions

Question 6

Epimysium

Answer 6

Surrounds muscle

Question 7

Perimysium

Answer 7

Surround fasicle

Question 8

Endomysium

Answer 8

Surround fiber

Question 9

Myosin

Answer 9

Make up thick filament. Contractile protein.

Question 10

Actin

Answer 10

Make up thin filament

Question 11

Myosin-binding site

Answer 11

Where myosin head attaches

Question 12

Tropomyosin

Answer 12

Regulatory protein that covers active site when the muscle is relaxed. Rope like.

Question 13

Troponin

Answer 13

Regulatory protein that anchors tropomyosin in place.

Question 14

Intercalated disks

Answer 14

Connection point between cardiac muscle fibers that allows electrical signals to spread quickly from cell to cell

Question 15

Visceral smooth muscle tissue

Answer 15

Arranged as sheets of cells

Question 16

Multiunit smooth muscle tissue

Answer 16

Individual fiber acting alone