chapter 6 vocab 1: muscles

23 terms by snnoung

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Maximus

very big, very large, very great

Antagonist

a muscle that neutralizes or counteracts the effects of another muscle

Cardiac muscle

the muscle tissue of the heart

Insertion

movable attachment of a muscle

I band

The region of the sarcomere made up only of thin filaments. The I band is bisected by a Z line. I bands alternate with A bands to give skeletal and cardiac muscle a striated appearance. I bands get shorter (and may disappear completely) during muscle contraction.

Glucose

the form of sugar that circulates in the blood and provides the major source of energy for body tissues. When its level is low, we feel hunger.

Immovable bone

origin of muscle??

Myosin

A protein present in muscle fibers that aids in contraction and makes up the majority of muscle fiber; A type of protein filament that interacts with actin filaments to cause cell contraction.

Smooth muscle

a muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart). involuntary muscle, not striated

Origin

attachment of a muscle that remains relatively fixed during muscular contraction

Epimysium

Connective tissue layer surrounding an individual muscle

Lactic acid

product of fermentation in many types of cells, including human muscle cells, causng the muscles to get sore

Movable bone

muscle's insertion

Actin

a contractile protein of muscle

Skeletal muscle

Voluntary, striated muscle that moves bones, works in pairs and is attached to bones by tendons

Oxygen debt

Respiration in the absence of sufficient oxygen leads to a build up of lactic acid that has to be cleared when sufficient oxygen is available.

Endomysium

thin connective tissue surrounding each muscle cell. (fiber?)

ATP (adenosine triphosphate)

main energy source that cells use for most of their work

Synergist

muscles that contract simultaneously with the prime mover to facilitate more effective movement(helps execute movement or steady a part)

Tendon

a band of fibrous tissue that connects muscle to bone

Acetylcholine

a neurotransmitter that triggers muscle contraction and affects learning and memory

Z band

actin attached to the ends of the sarcomere- the muscle fiber does not move but follows the contraction of the actin

Sarcolemma

cell membrane of a muscle cell

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