Chapter # 7 Guided Lesson Pg 2

Question 1

The name of muscle cells?

Answer 1

Muscle Fiber

Question 2

The plasma membrane of the muscle cell is called?

Answer 2

Sarcolemma

Question 3

The structures that attach muscle to bone & composed of dense regular tissue

Answer 3

Tendon

Question 4

The sheet of connective tissue that surrounds each muscle cell

Answer 4

Endomysium

Question 5

Groups of muscle fibers are called

Answer 5

Fascicles

Question 6

The contractile unit of a muscle fiber made up of myofilaments is called

Answer 6

Sarcomere

Question 7

The layer of connective tissue that surrounds the entire muscle

Answer 7

Epimysium

Question 8

The smooth endoplasmic reticulum that stores calcium in a resting muscle cell is called

Answer 8

Sarcoplasmic reticulum

Question 9

The groups of contractile myofilaments inside a muscle cell

Answer 9

Myofibrils

Question 10

The parts of the sarcolemma that fold into the muscle fiber & allow membrane potential to reach all myofibrils inside the cell

Answer 10

T - tubules

Question 11

Does smooth muscle have striations?

Answer 11

No

Question 12

A ________is the contractile unit of a muscle cell

Answer 12

Sarcomere

Question 13

Thin myofilments made of a protein called _________

Answer 13

Actin

Question 14

Thick myofilaments is made of a protein called

Answer 14

Myosin

Question 15

On the thin Myofilament what are the two regulatory proteins called

Answer 15

1. Tropomyosin
2. Troponin

Question 16

The regulatory protein _________runs along the entire length of the thin myofilament and covers the myosin - binding sites when the muscle is at rest.

Answer 16

Tropomyosin

Question 17

The regulatory protein ________
Interacts with the ion calcium.

Answer 17

Troponin

Question 18

When calcium is released both regulatory protein ________&_______
change shape allowing actin and myosin to interact with one other & trigger contraction

Answer 18

Actin and myosin

Question 19

The sarcomere has zig zag structure on either edge called ________

This is where the thin myofilments attach

Answer 19

Z disc

Question 20

What is found in the middle of the Sarcomere that helps anchor the thick myofilaments together

Answer 20

M line

Question 21

The middle region of the the sarcomere where only thick myofilments are present is called the ______________

Answer 21

H Zone

Question 22

In the sarcomere the darker bands are called ___________

Answer 22

A bands

Question 23

In Sarcomere the darker bands are called_________

And have thick myofilments & any regions where the thin myofilments overlap with them

Answer 23

A band

Question 24

Regions that only contain thin myofilments are lighter in appearance are called the ______________.

Answer 24

I Bands

Question 25

Runs along the entire length of the Thin myofilments and covers the myocin binding sites when the muscle cell is at rest

Answer 25

Tropomycin

Question 26

Interacts with iron calcium and triggers muscle contraction

Answer 26

Troponin