Muscular System- Chapter 10

Front 1

Endomysium

Back 1

Layer of connective tissue around a muscle fiber

Front 2

Fascicles

Back 2

Bundles of muscle fibers surrounded by a layer of connective tissue

Front 3

Perimysium

Back 3

The connective tissue sheath surrounding these bundles

Front 4

Epimysium

Back 4

Outer connective tissue sheaths surrounding a muscle

Front 5

Deep fascia

Back 5

Outer sheaths of connective tissue surrounding muscles and is continuous with hypodermis

Front 6

Endoneurium

Back 6

A layer of loose connective tissue around an axon that isolates it

Front 7

Fasicle

Back 7

Is a bundle of axons surrounded by connective tissue within a nerve

Front 8

Perineurium

Back 8

The connective tissue sheath surrounding these bundles

Front 9

Epineurium

Back 9

A thick layer of dense connective tissue around an entire nerve

Front 10

A muscle is also called a

Back 10

Myofiber

Front 11

Sarcolemma

Back 11

Plasma membrane

Front 12

T-tubule

Back 12

Extension if sarolemma into cell- transfer stimuli to sarcoplasmic reticulum

Front 13

Sarcoplasm

Back 13

Cytoplasm

Front 14

Sarcoplasmic Reticulum

Back 14

sarcoplasmic reticulum- stores and releases Ca 2+ ions

Front 15

Myofibril

Back 15

Basic unit of muscle contraction

Front 16

Myofilament

Back 16

Functional proteins if myofibril/sacromere

Front 17

Thick filaments

Back 17

Composed of myosin

Front 18

Thin filaments

Back 18

Composed of actin

Front 19

Largest to smallest

Back 19

Myofiber, myofibril, sarcomere, myofilament

Front 20

Sliding filament theory- concept on how muscle contracts;

Back 20

Proteins don't shorten during contraction. Actin is slid over myosin towards the center of sarcomere

Front 21

Actin

Back 21

Protein that slides to the center of saromere during contraction

Front 22

Myosin

Back 22

Protein that contains clubhead

Front 23

Crossbridge

Back 23

Unit of myosin + actin during contravtion

Front 24

Tropomyosin

Back 24

Blocks actions binding site for myosin

Front 25

Troponin

Back 25

Holds tropomyosin in place. It binds Ca 2+ ion

Front 26

Ca 2+

Back 26

Serves as a key to unlock the action binding + permit contraction

Front 27

Neuromuscular junction

Back 27

Synapse between an axon and a single myofiber

Front 28

Synapase

Back 28

An interaction between an axon+ another neuron effector

Front 29

Synaptic bulb

Back 29

Fluid filled space between axon terminal+ myofiber

Front 30

Synaptic cleft

Back 30

Fluid filled space between axon terminal + myofiber

Front 31

Post Synaptic membrane

Back 31

Sarcolemma, with receptors to bind acethyleholine

Front 32

Neurotransmitter

Back 32

Chemical signal of the nervous system; required to cross synapse

Front 33

Isometric tension

Back 33

Increases during contraction, but length remains the same

Front 34

Isotonic

Back 34

Length changes during contraction, but tension remains the same