ABOUT MUSCULAR

Question 1

stimulates skeletal muscle
to contract.

Answer 1

Somatic Motor Neuron

Question 2

structural and functional unit of a skeletal
muscle.

Answer 2

Muscle Fiber

Question 3

the plasma membrane of a muscle cell

Answer 3

Sarcolemma

Question 4

tiny invaginations of the sarcolemma, tunnel in from the surface toward the center of each muscle fiber.

Answer 4

Transverse (T) tubules

Question 5

the cytoplasm of a muscle fiber.

Answer 5

Sarcoplasm

Question 6

large molecule composed of many glucose molecule

Answer 6

Glycogen

Question 7

red-colored protein; found only in muscle

Answer 7

Myoglobin

Question 8

appears like little threads inside the
sarcoplasm

Answer 8

myofibrils

Question 9

A fluid-filled system of membranous sacs which encircles the entire myofibrils.

Answer 9

Sarcoplasmic Reticulum

Question 10

dilated end sacs of the sarcoplasmic reticulum butt against the T tubule

Answer 10

Terminal Cisterns

Question 11

– is the scientific study of muscles

Answer 11

MYOLOGY

Question 12

small protein structures within the myofibrils

Answer 12

Myofilaments or filaments

Question 13

are the basic functional units of a myofibril

Answer 13

Sarcomeres

Question 14

COMPONENTS OF SACROMERES

Answer 14

Z discs
A band
I band
H zone
M line

Question 15

the darker middle part of the sarcomere which extends the entire length of the thick filaments.

Answer 15

A band

Question 16

Is a lighter, less dense area that contains the rest of the thin filaments but no thick filaments

Answer 16

I band

Question 17

narrow, plate-shaped regions of dense protein material separate one sarcomere from the next.

Answer 17

Z discs

Question 18

located in the center of each A band contains thick but not thin filaments.

Answer 18

H zone

Question 19

so named because it is at the middle of the sarcomere; at the center of the H zone.

Answer 19

M line