Anatomy&physiology Ch 9 & 10

Front 1

Muscle fibers

Back 1

Skeletal and smooth muscle cells (but not cardiac muscle cells) are elongated.

Front 2

1)Myo or Myos or 2)Sarco

Back 2

1)both are word roots meaning "muscle"
2)flesh the reference is to muscle ex:plasma membrane of muscle fibers is sarcolemma (muscle husk)

Front 3

Skelatal Muscle Tissue

Back 3

packaged into the skeletal muscles, organs that attach to and cover the bony skeleton. Skeletal muscle fibers are the longest muscle cells, have obvious stripes called striations and can be controlled voluntarily.

Front 4

Voluntary Muscle

Back 4

(another name for skeletal muscle) bc it is the oly type subject to conscious control. keep in mind skeletal, striated and voluntary.

Front 5

Skeletal Muscle Responsibilities

Back 5

overall body mobility, contract rapidly, tires easily and must rest after short periods of activity.Can exert tremendous power,remarkably adaptable

Front 6

Cardiac Muscle Tissue

Back 6

only in the heart, the body's blood pump, constitutes the bulk of the heart walls. Also striated, but NOT voluntary. key words: cardiac, striated, involuntary.

Front 7

Smooth Muscle Tissue

Back 7

foun in the walls of hollow visceral organs. ex: stomach, urinary bladder, and respiratory passages. Forces fluids and other substances through internal body channels. NO striations, not subject to voluntary control. Key words: visceral, nonstriated, and involuntary. Contractions slow and sustained.

Front 8

Excitability (responsiveness or irritability)

Back 8

Ability to receive and respond to a stimulus, that is any change in the environment whether inside or outside the body. Muscle-chemical ex:neurotransmitter released by nerve cell or local change in pJ.

Front 9

Contractility

Back 9

ability to shorten forcibly when adequately stimulated.

Front 10

Extensibility

Back 10

ability to be stretched or expanded. Muscle fibers shorten when contracting, but can be stratched when relaxed.

Front 11

Elasticity

Back 11

ability of a muscle fiber to recoil and resume its resting length after being stretched

Front 12

Muscle functions

Back 12

Produced movement, maintains posture, stabilizes joints, generates heat(as they contract), protects more fragile internal organs by enclosure.

Front 13

Skeletal Muscle

Back 13

is a descrete organ, made up of several kinds of tissues. Each is supplied with nerve endings that control its activity.

Front 14

Muscle cells

Back 14

give off large amounts of metabolic wastes that must be removed through veins of contraction is to remain efficient.

Front 15

Muscle (organ)

Back 15

Consistes of hundreds to thousands of muscle cells, plus connective tissue wrappings, blood vescels and nerve fibers. (covered externaly by the epimysium)