Micro Anatomy of Muscles

Question 1

Epimysium

Answer 1

a layer of connective tissue that surrounds the entire muscle

Question 2

Perimysium

Answer 2

divide the skeletal muscle into bundles (Remember: Peri means around)

Question 3

Fascicles

Answer 3

A bundle of muscle fibers surrounded by the perimysium.

Question 4

Endomysium

Answer 4

surrounds each skeletal muscle fiber and ties adjacent muscle fibers together. (Remember: Endo means inside)

Question 5

Sarcolemma

Answer 5

cell membrane that surrounds the sarcoplasm

Question 6

Sarcoplasm

Answer 6

cytoplasm of muscle

Question 7

Transverse tubules

Answer 7

passageways through muscle fiber

Question 8

Sarcoplasmic Reticulum

Answer 8

Is a Smooth endoplasmic reticulum. Forms tubular network around each myofibril

Question 9

Myofibrils

Answer 9

Bundles of thick myofilaments. Responsible for muscle contraction

Question 10

Sarcomeres

Answer 10

smallest functional unit of muscle fiber

Question 11

Actin

Answer 11

thin filaments

Question 12

Myosin

Answer 12

thick filaments

Question 13

Z line

Answer 13

Where actin is attached

Question 14

M line

Answer 14

Where myosin is attached

Question 15

A band

Answer 15

the area containing myosin

Question 16

I Band

Answer 16

region where there is only actin

Question 17

active site

Answer 17

where actin interacts with myosin

Question 18

Tropomyosin

Answer 18

a protein that covers actin’s active site