Chapter 10 Pt. 1 A&P

Question 1

What are the main functions of muscles? (4)

Answer 1

1. Purposeful movement
2. Manipulation of external
3. Propulsion of contents
4. Emptying of contents

Question 2

Categorized muscle: 4

Answer 2

1. Striated
2. Un striated
3. Voluntary
4. Involuntary

Question 3

What muscles are striated?

Answer 3

Skeletal and Cardiac

Question 4

What muscle is un striated?

Answer 4

Smooth muscle

Question 5

Which muscle is voluntary?

Answer 5

Skeletal

Question 6

Which muscles are involuntary?

Answer 6

Cardiac and Smooth

Question 7

What are muscles categorized by?

Answer 7

Structure and Control

Question 8

What are muscle fibers bundled together by?

Answer 8

Connective tissue

Question 9

What are muscle fibers composed of?

Answer 9

Myofibrils

Question 10

What are myofibrils made of?

regular arrangement of…

Answer 10

Thick and Thin filaments

Question 11

What fibers lay parallel to one another?

Answer 11

Muscle fibers

Question 12

In muscle organization, what is whole muscle?

Answer 12

An organ

Question 13

In muscle organization, what is muscle fiber?

Answer 13

A cell

Question 14

In muscle organization, what is myofibril?

Answer 14

Specialized intracellular structure

Question 15

In muscle organization, what is myofilament?

Answer 15

Thick and thin filament

Question 16

In muscle organization, what are protein molecules?

Answer 16

Myosin and actin

Question 17

What is a dense sheet or broad band or irregular CT?

Answer 17

Fascia

Question 18

What surrounds each muscle fiber?

Answer 18

Endomysium

Question 19

What is around muscle fibers separating muscles into fascicles?

Answer 19

Perimysium

Question 20

What surrounds the entire muscle?

Answer 20

Epimysium

Question 21

What attaches muscle to bone?

Answer 21

Tendon

Question 22

What are the 3 levels of fascia?

Answer 22

Endomysium, Perimysium, and Epimysium

Question 23

What is the sarcolemma?

Answer 23

Plasma membrane of muscle cell

Question 24

What are T tubules?

Answer 24

Invaginations of sarcolemma into muscle tissue

Question 25

What is the cytoplasm of muscle fiber?

Answer 25

Sarcoplasm

Question 26

What is the red-colored protein that binds oxygen found only in muscle?

Answer 26

Myoglobin

Question 27

What is the sarcoplasmic reticulum?

Answer 27

Smooth ER of muscle cells containing calcium

Question 28

What does “myo” mean?

Answer 28

Muscle

Question 29

FYI:

Answer 29

Question 30

What is the Sarcomere an arrangement of?

Answer 30

Myofibrils

Question 31

What is the “I band”?

Answer 31

Thin filaments that do not project into “A band”

Question 32

What is the “A band” made of?

Answer 32

Thick filaments ONLY

Question 33

What does the Z-line/disc make up?

Answer 33

The edges of sarcomeres, it is the cytoskeleton fiber to anchor actin

Question 34

What is the supporting protein in the middle or the sarcomere?

Answer 34

M-line

Question 35

What is the “H zone”?

Answer 35

Central portions of thick filaments in the sarcomere

Question 36

FYI:

Answer 36

Question 37

True or False: Myosin forms thin filaments.

Answer 37

False. It forms thick filaments.

Question 38

What looks like intertwined golf clubs?

Answer 38

Myosin

Question 39

Each myosin head has: (2 things)

Answer 39

1. Actin-binding site
2. ATP-binding site

Question 40

What kind of filaments does Actin form?

Answer 40

Thin

Question 41

What looks like Christmas bulbs/pearl necklace?

Answer 41

Actin

Question 42

Two other proteins in Actin:

Answer 42

Tropomyosin and Troponin

Question 43

What has 3 polypeptide units?

Answer 43

Troponin

Question 44

What binds Ca2+?

Answer 44

Troponin

Question 45

You’re doing great!

Answer 45

Keep going! :)