Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Anatomy: Muscles
| Term | Definition |
|---|---|
| contractility | the ability of skeletal muscle to shorten with force |
| excitability | the capacity of skeletal muscle to respond to a stimulus |
| extensibility | the ability to be stretched |
| elasticity | ability to recoil to their original resting length after they have been stretched |
| each skeletal muscle is surrounded by a connective tissue sheath called the _____? | epimysium |
| another connective tissue located outside the epimysium. it surrounds and separates muscles? | fascia |
| a muscle is composed of numerous visible bundles called muscle fasciculi, which is surrounded by loose connective tissue called _____? | perimysium |
| the fasciculi are composed of single muscle cells called _____? | fibers |
| Each muscle fiber is a single cylindrical cell containing _____ _______? | several nuclei |
| each fiber is surrounded by a connective tissue sheath called the _____? | endomysium |
| the cytoplasm of each fiber is filled with _____? | myofibrils |
| myofibrils | threadlike structure that extends from one end of the fiber to the other |
| myofibrils consist of 2 major kinds of protein fibers ? | actin myofilaments and myosin myofilaments |
| actin myofilaments | thin myofilaments. They resemble 2 minute strands of pearls twisted together. |
| myosin myofilaments | thick myofilaments. They resemble bundles of minute golf clubs. |
| actin and myosin filaments form highly ordered units called ______? | sarcomeres |
| sarcomere | the basic structural and functional unity of the muscle |
| _____? are joined end to end to form the myofibril | sarcomeres |
| each sarcomere extends from one z line to another z line . each z line is an attachment site for _____? | actin |
| the arrangement of actin and myosin give a ____ appearance? | banded |
| on each side of the z line is a light area called an I band, it consists of _____? | actin |
| the _ _____ extends the length of of the myosin? | A band |
| the A band is the _______ central region in each sarcomere? | darker |
| in the center of each sarcomere is another light area called the _ ____, which consists of only myosin? | H zone |
| the myosin myofilaments are anchored in the center of the sarcomere at a dark staining band called the _ ____? | M line |
Created by:
taylorkennedy
Popular Anatomy sets