A&P Exam 3

What are the three types of muscle tissue

skeletal, cardiac, and smooth

what system controls skeletal tissue?

nervous

what system controls the smooth and cardiac muscle?

endocrine

universal characteristics of muscles

excitability, conductivity, contractility, extensibility, elasticity

define excitability

responsiveness/ ability of a muscle cell to recieve and respond to stimulus

define conductivity

LOCAL electrical excitation that sets off a wave that travels

define contractility

ability to shorten forcibly when adequately stimulated

define extensibility

ability to be stretched or extended

define elasticity

ability to recoil and return to normal length

what are the 3 connective tissue layers of skeletal muscle?

epimysium, perimysium, endomysium

detail the epimysium

around each muscle and blends with the fascia

detail the perimysium

connective tissue around muscle fascicles

detail the endomysium

connective tissue around each muscle fiber

define a muscle fascicle

bundle of skeletal muscle fibers

define muscle fiber (myofiber)

single, cylindrical cell

define myofibril

rod like structure found in myofiber

define sarcomere

repeating functional units within myofibril

where do contractions concur

the sarcomere

what give muscles the striated

actin and myosin in myofilaments

fusiform

thick in the middle tapered in the ends

parallel muscle

uniform width and parallel fasciles

triangular(convergent)

(rectus abdominis)- can shorten more than most ribs;loooooooooooooooiuuuuuuuuuuuuuuuuiij