Skeletal Muscle Structure

Question 1

Also known as striated muscle

40% of body weight

Answer 1

Skeletal muscle

Question 2

Skeletal muscle consists of ?

Answer 2

Skeletal muscle tissue
Nervous
Connective
Adipose

Question 3

Each skeletal muscle is surrounded by a connective tissue called ?

Answer 3

Epimysium or muscular fascia

Question 4

Each whole muscle is subdivided into numerous visible bundles called ?

Answer 4

Muscle fascicles

Question 5

A loose connective tissue called the ________ separate muscle fascicles from each other

Answer 5

Perimysium

Question 6

A loose connective tissue called the _________ surrounds each muscle fiber

Answer 6

Endomysium

Question 7

The cell membrane of the muscle fiber is called ?

Answer 7

Sarcolemma

Question 8

Sarcolemma has many tubelike inward folds called

Answer 8

Transverse tubes or T tubules

Question 9

Occur at a regular intervals along the muscle fiber and extend into the center of the muscle fiber

Answer 9

T tubules

Question 10

T tubules are associated with enlarged portions of the smooth endoplasmic reticulum

Answer 10

Sarcoplasmic reticulum

Question 11

Cytoplasm of muscle fiber is called ?

Answer 11

Sarcoplasm

Question 12

Within the sarcoplasm, each muscle fiber contains many bundles of

Answer 12

Protein filaments

Question 13

These bundles are called ?

Answer 13

Myofibrils

Question 14

Myofibrils consist of 2 major kinds of protein fibers

Answer 14

Actin myofilaments

Myosin myofilaments

Question 15

Basic structural and functional unit of a skeletal muscle

Smallest portion of a skeletal muscle capable of contracting

Answer 15

Sarcomere

Question 16

Separates one sarcomere from the next

Answer 16

Z disks

Question 17

Is a network of protein fibers that forms a stationary anchor for actin myofilaments to attach

Answer 17

A Z disks

Question 18

Light staining bands are called ?

Dark staining bands are called ?

Answer 18

I bands

A bands

Question 19

Lighter staining region and contains only myosin myofilaments is called ?

Answer 19

H Zone

Question 20

Consists of fine protein filaments that anchor the myosin filaments in place

Answer 20

M Line

Question 21

Actin myofilaments or thin filaments are made of 3 components

Answer 21

Actin
Troponin
Tropomyosin

Question 22

It has attachment sites for the myosin myofilaments

Resembles pearls twisted together

Answer 22

Actin strands

Question 23

Have binding sites for Ca2+

Attached at specific intervals along the actin myofilaments

Answer 23

Troponin

Question 24

Filaments block the myosin myofilaments binding sites

Answer 24

Tropomyosin

Question 25

Resembles bundles of tiny golf clubs

Answer 25

Myosin filaments or thick myofilaments

Question 26

The parts of the myosin molecule that resemble golf clubs are referred to as

Answer 26

Myosin heads