muscles

types

100

this type is only found in the heart

cardiac type

200

these muscles attatch to the muscles to produce movement

skeletal

300

this type line organs

smooth

400

this type appears striped under the microscope

skeletal

anatomy

100

chains of tiny contractile units

sarcomeres

200

thin filaments are composed of this protein

actin

300

these nearly fill up the cytoplasm

myofibrils

400

the sarcoplasmic reticulum(SR) stores and releases this mineral

calcium

500

specialized smooth endoplasmic reticulum

sarcoplasmic reticulum

functions

100

ability to shorten when an adequate stimulus is received

contractacility

200

ability for the muscle cells to be stretched

extensibility

300

ability for muscle cells to recoil and resume resting after stretching

elasticity

400

skeletal muscles must be stimulated by this to contract

motor neuron or nerve cell

500

ability to receive and respond to a stimulus

excitability

graded responses

100

single, brief contraction. not a normal muscle function

twitch

200

one contraction is immediately followed by another, the muscle does not completely return to a resting state

summing of contractions

300

unfused tetanus

some relaxation occurs between contractions, faster rate than than during summing of contractions

400

no relaxation before the following contractions, no relaxation, smooth and sustained muscle contraction

fused tetanus

500

different degrees of skeletal muscle shortening is known as this

graded responses

muscle vocab

100

this is when some muscle fibers are contracted even in a relaxed muscle

muscle tone

200

this increases muscle size, strenght, and endurance

exercise

300

decreases angle of joint, brings 2 bones closer together. like bending hinge joints

flexion

400

opposite of flexion

extension

500

turn sole of foot laterally

eversion