Chapter 14: Microscopic Anatomy and Organization of Skeletal Muscle Flashcards

Cards
 Quiz

Matching

UPDATED
Bingo

Print Print
Set Details Share
created 12 years ago by KatieLady13
783 views
updated 12 years ago by KatieLady13
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:

1

Skeletal Muscle, Characteristics

Voluntary control Striated and multinucleated

2

Skeletal Muscle, Functions

Allows movement. Influences body shape. Ability to manipulate environment.

3

Cardiac Muscle, Characteristics

Involantary control striated and uninucleated

4

Cardiac Muscles, Functions

Pumps blood throughout the body

5

Smooth Muscles, Characteristics

Involuntary (except diaphragm) not striated and uninucleated

6

Smooth Muscles, Function

Found in hollow organs and causes peristalsis, BP, pupil size, and erects hair

7

Muscle Fiber

Long cylindrical muscle cell

8

Myofibrils

Makes up muscle fibers and gives striated appearance. The contractile ORGANELLE of skeletal muscle

9

Myofilament, Light (I) band (Thin filament)

Actin

10

Myofilament, Dark (A) band (Think filament)

Myosin

11

H Zone

Portion of A band where thick and thin filaments do not overlap (ONLY thick filament)

12

Z line/disc

Bisects I band (from 1 z disc to another z disc = 1 sarcomere)

13

Transverse (T) Tubule

Indent of sarcolemma at junction of A and I bands

14

Sarcomere

Contractile unit of muscle

15

Sarcoplasmic Reticulum

Similar to smooth ER. Stores Ca ions amongst other functions.

16

Sarcolemma

Covering of individual muscle fibers (plasma membrane)

17

Sarcoplasm

Cytoplasm of the muscle fiber (cell)

18

Sarcosome

Mitochondria of the muscle cell

19

Terminal Cisternae

Dilated end sacks of the sarcoplasmic reticulum

20

Endomysium

Thin areolar CT surrounding each cell

21

Perimysium

Collagenic membrane sheathing bundle of fibers

22

Epimysium

Dense overcoat of CT around entire muscle

23

Fascicle

Bundle of muscle fibers (cells)

24

Deep Fascia

CT that binds muscle into functional groups

25

Tendon

Connects muscle to bone (strong and cordlike)

26

Aponeuroses

Connects muscle to muscle or muscle to bone (flat and sheet-like)

27

Insertion

Movable point of attachment

28

Origin

Fixed (immovable) point of attachment

29

Neuromuscular Junction (NMJ)

Found between nerve fibers and muscle cells. A single neuron can stimulate many muscle cells.

30

Motor Unit

Composed of the muscle cell and stimulating neuron.

31

Synaptic Cleft

Gap between the neuron and muscle fiber.