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

Muscular System Lab

Lecture slides

TermDefinition
Size: Brevis Means short
Shape: Teres Means round
Location: Brachii Means of the arm
Number of heads: Biceps Means two heads
Orientation of the fibers: Rectus Means straight
Action: Flexor Means a muscle that flexes
Three types of muscles: 1. Skeletal muscles. 2. Smooth muscles. 3. Cardiac muscles.
Skeletal Muscle Attached to the skeleton; their contractions help move, breathe, look for food, chew, swallow, walk, work, run, dance, etc. Heat generating muscle contractions help regulate body temperature; Decide to move voluntarily; Striated; muscle cell fiber.
Smooth Muscle In the walls of hollow organs; their contractions are necessary for breathing, digestion, circulation, urination, etc. Involuntary; non-striated; fusiform cell shape.
Cardiac Muscle Only in the walls of the heart; their contractions pump the blood; striated; involuntary cell= cardiomyocyte.
Properties of muscle 1. Excitability (responsiveness)- react to stimuli. 2. Conductivity- spread electrical impulse throughout the cell. 3. Contractility- shorten when stimulated. 4. Extensibility- can stretch without harm. 5. Elasticity- can recoil from stretch.
Connective tissues and Fascicles 1. Fascia: wraps muscle group. 2. Epimysium: wraps the whole muscle; outer membrane. 3. Perimysium: wraps muscle fibers in bundles (fascicles). 4. Endomysium: wraps each cell.
Fusiform muscles Thick in middle, tapered at ends.
Parallel muscles Uniform width, fascicles aligned.
Triangular (convergent) muscles Broad at one end, narrow at other end.
Pennate muscles Feather-shaped.
Circular muscle (sphincters) Form rings around body openings.
Muscle origin Muscle attachment at relatively stationary end.
Muscle insertion Muscle attachment at more mobile end.
Belly Area between origin and insertion.
Function group of muscles 1. Prime mover (agonist): produces main force of action. 2. Synergist: Aids prime mover to produce more power. 3. Antagonist: opposes prime mover; relaxes to let the prime mover control the action. 4. Fixator: prevents bone movement; holds it steady
Intrinsic Muscles Entirely contained within a particular region, having both attachments (origin and insertion) there; tongue, larynx, hand, foot.
Extrinsic Muscles Acts upon a designated region but has its origin elsewhere; some finger movements produced by extrinsic muscles in forearm whose long tendons reach the fingers, while others produced by intrinsic muscles between metacarpal bones.
Mechanical Advantage Length of effort arm divided by length if resistance arm.
Created by: carmencramirez18
Popular Biology 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