Muscular System

Question 0

8 characteristics of skeletal muscle

Answer 0

1. Fibers
2. Striated
3. Many nuclei/ fibers
4. Many mitochondria
5. Arranged in bundles
6. Mostly protein
7. Attached to bone
8. Voluntary

Question 1

Posture

Answer 1

Alignment of body parts

Question 2

Tendon

Answer 2

Connects muscle to bone

Question 3

Myofibral

Answer 3

Elongated contractive threads in muscle

Question 4

Fasicle

Answer 4

Bundle of fibers

Question 5

Nerve supply

Answer 5

Together w the skeletal muscle fibers it supplies is a motor unit

Question 6

Fibrosis

Answer 6

Development of excess fibrous connective tissue

Question 7

Origin

Answer 7

Bone that does not move when muscle contracts

Question 8

Insertion

Answer 8

Bone that moves when muscle contracts

Question 9

Prime mover

Answer 9

Main muscle used in movement

Question 10

Antagonist

Answer 10

Works opposite prime mover

Question 11

Synergist

Answer 11

Assists prime mover

Question 12

6 ways we name muscles

Answer 12

1. Action
2. Direction of fibers
3. Location
4. Number of divisions
5. Shape
6. Points of attachment

Question 13

Functions of muscle system

Answer 13

1. Heat production
2. Movement
3. Posture

Question 14

Sarcolemma

Answer 14

Cell membrane of muscle fiber

Question 15

Sarcoplasm

Answer 15

Cytoplasm of muscle fiber

Question 16

Sarcoplasmic reticulum

Answer 16

Analogous but not identical to ER of cells other than muscle fibers

Question 17

Striation

Answer 17

Cross bands

Question 18

Actin

Answer 18

Thin filament

Question 19

Myosin

Answer 19

Thick filament

Question 20

Contraction

Answer 20

Thick and thin filaments combine forming cross bridges

Question 21

Epimysium

Answer 21

Fibrous connective sheath that envelops each muscle

Question 22

Perimysium

Answer 22

Extensions of epimysium, portioning each muscle into bundles of fibers

Question 23

Endomysium

Answer 23

Extension of perimysium between individual muscle fibers

Question 24

Aponeurosis

Answer 24

Broad flat sheet of fibrous connective tissue

Question 25

Tendon sheath

Answer 25

Tubes of fibrous connective tissue that enclose certain tendons

Question 26

Deep fascia

Answer 26

Layer of dense fibrous connective tissue under superficial fascia