Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

chapter 6 muscles

anatomy chapter 6 muscles

TermDefinition
Contractility shorten with force
Excitability respond to a stimulus
Extensibility ability to be stretched
Elasticity recoil to their original resting length
Epimysium surrounded by a connective tissue sheath
Fascia connective tissue, outside the epimysium
Perimysium surrounded by loose connective tissue
Fibers single muscle cells
Muscle Fiber single cylindrical cell containing several nuclei
Endomysium a connective tissue that surrounds each fiber
Myofibrils the cytoplasm of each fiber
Actin Myofilaments thin layer
Myosin Myofilaments thick layer
Sarcomeres basic structural and functional unit
Resting Membrane Potential the charge difference across the membrane
Actin Potential brief reversal back of the charge
Motor Neurons carry action potentials
Neuromuscular Junction near the center of the cell
Motor Unit single motor neuron
Presynaptic Terminal enlarged nerve terminal
Synaptic Cleft the space between presynaptic and muscle cell
Synaptic Vesicles each presynaptic terminal contains
Acetylcholine a secrete neurotransmitter
Acetylcholinesterase when a neuron and muscle cell get broken down by enzymes
Sliding Filament Mechanism sliding actin myofilaments past myofilaments during contraction
Muscle Twitch contraction of an entire muscle in response to a stimulus
Threshold muscle fiber will not respond to stimulus
Lag Phase a stimulus to a motor neuron and beginning of a contraction
Contraction Phase time of contraction
Relaxation Phase time during which muscle relaxes
Tetany where the muscle remains contracted without relaxing
Recruitment increase in the number of motor units being activated
ATP short-lived and unstable
ADP plus phosphate
Creatine Phosphate can store high energy molcules
Anaerobic Respiration without oxygen
Aerobic Respiration with oxygen
Oxygen Debt amount of oxygen needed in chemical reactions
Muscle Fatigue ATP is used during muscle contraction faster than it can produce
Isometric the amount of tension increases/ the length does not change
Isotonic the amount of tension produced/ the length changes
Muscle Tone keeps head up and back straight
Fast-Twitch Fibers contract quickly and fatigue quickly
Slow-Twitch Fibers contract more slowly and are most resistant to fatigue
Origin most stationary end of the muscle
Insertion end of the muscle undergoing the greatest movement
Belly portion of the muscle between the origin and the insertion
Synergists muscles that work together to accomplish specific movements
Antagonists muscles that work in opposition to one another
Prime Mover plays the major role in accomplishing the desired movement
Z Line sarcomere extends to
I Band light area
A Band extends the length of the myosin/ darker central region
H Zone only consists of myosin
M Line dark staining band
Occipitofrontalis raises the eyebrows
Orbicularis Oculi closes the eyelids
Orbicularis Oris puckers the lips
Buccinator flattens the cheeks
Zygomaticus smiling muscle
Levator Labii Superioris sneering
Depressor Anguli Oris frowning
Sternocleidomastoid lateral neck muscle/ prime mover
Thoracic Muscles muscles that move the thorax
Mastication chewing
Intrinsic Tongue Muscles change the shape of the tongue
Extrinsic Tongue Muscles move the tongue
Trapezius rotates scapula
Serratus Anterior pulls scapula anteriorly
Pectoralis Major adducts and flexes the arm
Flexor Carpi flexes the wrist
Extensor Carpi extends the wrist
Flexor Digitorum flexes the fingers
Extensor Digitorum extends the fingers
Brachialis flexes forearm
Created by: esmith11
Popular Anatomy sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards