Muscle Tissue

Question 1

4 functions of muscle tissue:

Answer 1

-excitability
-contractility
-extensibility
-elasticity

Question 2

Skeletal muscle

Answer 2

-striated
-multinucleated
-voluntary control
-Cannot regenerate

Question 3

Smooth Muscle

Answer 3

-not striated
-mononucleated
-autonomic control
-can regenerate

Question 4

Cardiac muscle

Answer 4

-striated
-mononucleated
-automatic control
-cannot regenerate
-only found in the heart
-intercalated disk

Question 5

2 regulatory proteins

Answer 5

-tropomyosin (covers active actin sites)
-troponin (draws tropomyosin away from active actin sites)

Question 6

2 Myofilaments

Answer 6

Actin
myosin

Question 7

Actin

Answer 7

-thin filament
-active sites

Question 8

Myosin

Answer 8

-thick filament
-wants to snap onto active sites

Question 9

Perimysium CT Layer

Answer 9

-loose CT
-surrounds muscle fascicle

Question 10

Endomysium CT layer

Answer 10

-around each muscle fiber (superficial to sarcolemma)
-areolar CT

Question 11

Epimysium

Answer 11

-around entire skeletal muscle
-dense irregular CT, fuse into tendons that connect bone

Question 12

z lines

Answer 12

middle of actin

Question 13

M lines

Answer 13

middle of myosin

Question 14

H band

Answer 14

Myosin only

Question 15

A band

Answer 15

actin and myosin

Question 16

I band

Answer 16

Actin only

Question 17

T-tubule

Answer 17

Transmits impulses to deeper regions of fiber

Question 18

Sarcoplasmic reticulum

Answer 18

-stores Ca, surround myofibril

Question 19

structure during contraction

Answer 19

-A band stays the same, z lines move closer together, H and I bands get smaller

Question 20

5 functions of skeletal muscle tissue

Answer 20

-skeletal movement
-support soft tissue
-maintain body position/posture
-control entry and exit of materials
-maintain body temp