Ch10 Flashcards Preview

Human Anatomy > Ch10 > Flashcards

Flashcards in Ch10 Deck (34):
0

A dense layer of collagen fibers that surrounds a skeletal muscle and is continuous with the tendons/aponeuroses of the muscle and with the perimysium.

Epimysium

1

A connective tissue partition that separates adjacent fasciculi in a skeletal muscle.

Perimysium

2

A small bundle; usually refers to a collection of nerve axons or muscle fibers.

Fascicle

3

A delicate network of connective tissue fibers that surrounds individual muscle cells.

Endomysium

4

Byronic stem cells that function in the repair of damaged muscle tissue

Myosatellite Cells

5

A collagenous band that connects a skeletal muscle to an element of the skeleton.

Tendon

6

A broad tendinous sheet that may serve as the origin or insertion of a skeletal muscle.

Aponeurosis

7

The plasma membrane of a muscle cell.

Sarcolemma

8

The cytoplasm of a muscle cell.

Sarcoplasm

9

The transverse, tubular extensions of the sarcolemma that extend deep into the sarcoplasm, contacting cisternae of the sarcoplasmic reticulum.

Transverse tubules

10

Organized collections of myofilaaments in skeletal and cardiac muscle cells.

myofibrils

11

A cytoskeletal filament in a skeletal or cardiac muscle cell; consists of actin, troponin, and tropomyosin.

Thin filaments

12

A cytoskeletal filament in a skeletal or cardiac muscle cell; composed of myosin with a core of titin.

Thick filament

13

A myosin head that projects from the surface of a thick filament and that can bind to an active site of a thin filament in the presence of calcium ions.

Cross bridge

14

A synapse between a neuron and a muscle cell.

Neuromuscular junction

15

A single stimulus contraction relaxation cycle in a skeletal muscle.

Twitch

16

If tension rises in stages like the steps in a staircase; if a skeletal muscle is stimulated a second time immediately after the relaxation phase has ended, the resulting contraction will develop a slightly higer maximum tension.

Treppe

17

Occurs when higher stimulant frequency eliminates the relaxation phase

Complete tetanus

18

the muscle as a whole does not change length and the tension produces never exceeds the load

isometric contractions

19

tension rises and the skeleton muscles length changes

isotonic contraction

20

The smallest contractile unit of a striated muscle cell.

Sarcomeres

21

A propagated change in the transmembrane potential of excitable cells, initiated by a change in the membrane permeability to sodium ions.

Action Potential

22

A narrow space, separates the synaptic terminal of the neuron from the opposing sarcolemmal surface.

Synaptic Cleft

23

A chemical neurotransmitter in the brain and peripheral nervous system.

Acetylcholine

24

A high-energy compound in muscle cells; during muscle activity, the phosphate group is donate to ADP, regenerating ATP.

Creatine Phosphate

25

The complete breakdown of organic substrates into carbon dioxide and water, via pyruvic acid; a process that yields large amounts of ATP but requires mitochondria and oxygen.

Aerobic Metabolsim

26

Without oxygen; The anaerobic cytoplasmic breakdown of glucose into lactic acid by way of pyruvic acid, with a net gain of two ATP molecules.

Anaerobic Process/Glycolysis

27

A compound produced from pyruvic acid under anaerobic conditions.

Lactic Acid

28

The conditions in muscle fibers are returned to normal, preexertion levels.

Recovery Period

29

The amount of oxygen required to restore normal, preexertion conditions.

Oxygen Debt

30

Also called cardiocytes or cardiac myocytes, are found only in the heart.

Cardiac Muscle Cells

31

Regions where adjacent cardiocytes interlock and where gap junctions permit electrical coupling between the cells.

Intercalated discs

32

Muscle tissue in the walls of manny visceral organs; characterized as nonstriated, involuntary muscle.

Smooth Muscle tissue

33

Muscle tissue within the heart. contracts without neural stimulation.

Cardiac Muscle Tissue