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ANATOMY

memorize.ai (lvl 286)

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Section 1

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cardiac muscle

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Anatomy Science

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6 years ago

Date created

Mar 1, 2020

Cards (40)

Section 1

(40 cards)

cardiac muscle

Front

also known as the myocardium. Like smooth muscle, cardiac muscle is involuntary. Cardiac muscles are thick in that they contract frequently to move blood in and out of the heart.

Back

Fascicle (perimyseum)

Front

is connective tissue that wraps bundles of muscle fibers--the bundles are called fascicles. The perimysium is a connective tissue layer that surrounds each fascicle.

Back

isotonic

Front

contractions involve muscle de eloping tension to either cause or control joint movement DYNAMIC MOVEMENT THEY ARE EITHER CONCENTRIC OR ECCENTRIC

Back

action

Front

when tension is developed in a muscle as a result of a stimulus muscle "contraction" term is exclusive in nature

Back

origin

Front

proximal attachment structurally the proximal attachment or a muscle or part that attaches closet to the midline or center of the body. The least movable part or attachment of the muscle

Back

isometric

Front

tension is developed within muscle but joint angles remain constant--STATIC MOVEMENT may be used to prevent a body segment from being move by external forces internal torque=external torque

Back

synergist

Front

assist in action of agonists--guiding muscles

Back

antagonist muscles

Front

located on opposite side of joint from agonist have the opposite concentric action also known as contralateral muscles work in cooperation with agonist muscles relaxing and allowing movement reciprocal inhibition

Back

Dissociation

Front

New ATP binds to myosin

Back

Cross bridge

Front

Activation of myosin via ATP ATP--> ADP+Pi+Energy Activation --> "cocked" position

Back

eccentric contraction

Front

external torque> internal torque controls movement caused by gravity or other resistance described as being a negative action

Back

Contractility

Front

ability of muscle to contract and develop tension or internal force against resistance when stimulated

Back

troponin

Front

globular protein that globs on actin--paper weight to hold it down--has to be activated --changes shape when bound with calcium

Back

skeletal muscle

Front

these muscles are voluntary muscles that allow you to control the movements. These muscles are attached to your bones via tendons. In order to move these muscles, tendons and bones have to work together. Major skeletal muscles in the body include deltoids, pectorals, abdominals, quadriceps, and gluteal muscles. They work in pairs.

Back

sarcolemma

Front

is the name of the cell membrane that encloses each muscle cell. The structure of muscle cells specifically is such that tunnel-like extensions from the ____ pass across muscle cells from side to side, so they are said to be t-tubules

Back

uses of muscles

Front

muscles can used to cause, control, or prevent joint movement or to initiate or accelerate movement of a body segment to slow down or decelerate movement of a body to prevent movement of a body segment by external forces

Back

tropomyosin

Front

threadlike protein lines on actin

Back

type II b

Front

fast twitch, glycolytic, white

Back

myofibril

Front

the components of skeletal muscle cells that are specific to muscle tissue. They are small, cylindrical structures located within the sarcoplasm of a skeletal muscle. They consists of bundles of thick and thin protein filaments generally called myofilaments.

Back

power stroke

Front

ADP +pi are released configurational change actin and myosin slide

Back

type 1

Front

slow twitch, oxidate, red

Back

extensibility

Front

ability of muscle to be passively stretched beyond its normal resting length

Back

action potential

Front

an impulse that travels along an axon

Back

insertion

Front

distal attachment structurally, the distal attachment or the part that attaches farthest from the midline or center part of the body the most movable part is generally considered this

Back

agonist muscles

Front

the activated muscle group during concentric or eccentric phases of movement know as primary or prime movers, or muscles most involved

Back

type 11a

Front

in between intermediate

Back

CONCENTRIC

Front

shortening internal torque>external torque causes movement against gravity or other resistance described as being a positive action

Back

Muscle (Epimysium)

Front

is connective tissue that wraps the whole muscle. The epimysium is a layer of dense irregular connective tissue that surrounds the whole skeletal muscle.

Back

KNOW THIS

Front

Back

sarcoplasm reticulum

Front

it holds calcium, storage depot for calcium

Back

Smooth muscle

Front

known as involuntary muscles, meaning a person cannot physically move them. An example of a smooth muscle is the digestive system, where you can't physically move them. Smooth muscles are long, thin-shaped cells attached to bones in the body.

Back

elasticity

Front

ability of muscle to return to its original length following stretching

Back

actin and myosin

Front

thin filaments are composted of actin, tropomyosin, and troponin. myosin are thick filaments composed of myosin only

Back

Transverse Tubules

Front

message to go deeper into muscle fiber. they are invaginations of the sarcolemma that extend deep into the sarcoplasm of the muscle fiber and wrap around every myofibril.

Back

excitability

Front

property of muscle being sensitive or responsive to chemical, electrical, or mechanical stimuli

Back

myofilament

Front

Myofibrils consists of bundles of thick and thin protein filaments, generally called________

Back

KNOW

Front

Back

stabilizers

Front

surround joint or body part contract to fixate or stabilize tha area to enable another limb or body segment to exert force and move also known as fixators

Back

Muscle fiber (endomysium)

Front

is connective tissue that wraps each individual muscle fiber. The endomysium is the innermost connective tissue layer, and is a thin sheath of delicate loose connective tissue that surrounds each muscle fiber.

Back

activated muscle

Front

when a particular muscle is activated it tends to pull both ends toward the center. actual movement is towards more stable attachment ex: bicep curl vs. chin up hip extension vs. RDL

Back