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
Michael Metzger
Chapter 6 Muscles
| Question | Answer |
|---|---|
| Muscle cells | Muscle fibers |
| Muscle responsible for smiling | Zygomaticus |
| Contractility | Ability of muscle to shorten with force |
| Excitability | The capacity of muscle to respond to a stimulus |
| Elasticity | Ability to recoil to their original resting length after being stretched |
| Epimysium | Surrounds each skeletal muscle; Connective tissue |
| Fascia | Connective tissue that separates muscles |
| Sarcomere | Formed by actin and myosin myofilaments |
| Actin myofilaments | Thin; Resemble 2 small strands of pearls twisted together |
| Myosin myofilaments | Thick; Resemble bundles of golf clubs |
| I band | Consists of Actin; On each side of the Z line |
| Z line | Attachment site for actin |
| A band | Extends length of myosin; Darker central region of sarcomere |
| H zone | Light area in the center of the sarcomere |
| M line | Myosin filaments anchored in the center of the sarcomere |
| Resting membrane potential | Outside of cells have negative charges and inside positive |
| Action potential | Brief reversal of charges of the cell |
| Motor neurons | Nerve cells that carry action potential |
| What do myofibrils contain? | Actin and Myosin that form sarcomeres |
| Tetany | When a muscle remains contracted without relaxing |
| Creatine phosphate | High energy molecule that produces ATP |
| Anaerobic respiration | Does not use oxygen |
| Aerobic respiration | Uses oxygen |
| Fast twitch | Muscle fibers that fatigue quickly |
| Slow twitch | Muscle fibers that are more resistant to fatigue |
| Origin/Head | Most stationary end of the muscle |
| Frontalis | Raises eyebrows |
| Pectoralis Major | Upper chest |
| Gluteus Maximus | Buttocks |
| Insertion | End of muscle attached to the bone undergoing greatest movement |
| Oblique | Diagonal muscle |
| Synergists | Muscles that work together |
| Antagonists | Muscles that work opposite of each other |
| Intrinsic tongue muscle | Changes shape of the tongue |
| Extrinsic tongue muscle | Moves the tongue |
| Zygomaticus | Used for smiling |
| Belly of a muscle | Between Origin and insertion |
| Flexor | Flexes a muscle |
| Orbicular Oculi | Closes eyelid |
| Depressor Anguli Oris | Frowning muscle |
| Gastocnemius | Bigger bulge of the calf muscle |
| Soleus | Smaller bulge of calf muscle |
| Biceps Brachii | Muscle on the anterior side of the arm |
| Triceps Brachii | Muscle on the posterior side of the arm |
| Deltoid | Muscle on the shoulder |
| Pectoralis Major | Upper chest muscle |
| Sernocleidomastoid | Neck muscles |
| Rectus Abdominis | Abdominals |
| Trapezius | Muscle on your back in the shape of a trapezoid |
| Latissimus Dorsi | "Swimmers muscle" Muscle to the left of your spine |
| Hamstring | Posterior thigh muscle |
| Quadriceps | Anterior thigh muscle |
| Mastication | Chewing |
| Masseter | Muscle in the jaw used for chewing |
| Muscle twitch | Contraction of an entire muscle in response to a stimulus |
| Fasiculi | Muscle composed of numerous bundles |
Created by:
Mmetz921