Muscle physiology
The zig-zag structure that anchors the thin filaments within a muscle fiber.
What is the Z-line?
Muscle tissue that maintains posture, body position, and stabilizes joints.
What is Skeletal Muscle Tissue?
A bundle of muscle fibers.
(Hint: It looks and sounds like popsicle...)
What is a Fascicle?
The term used when muscles shorten.
What is contraction?
This organelle produces most of the ATP needed for a muscle to contract.
(Hint: It's the powerhouse of the cell)
What is mitochondria?
During muscle contraction, this protein filament slides inward toward the M line, causing the entire sarcomere to shorten as it is pulled on by "cross bridges".
What is Actin?
This type of involuntary muscle tissue lacks visible stripes or bands.
What is Smooth Muscle Tissue?
A single cell of muscle tissue.
What is a Muscle Fiber?
The opposite action of when a muscle is contracted. This describes a muscle that is lengthened beyond its resting position, with its sarcomeres extended and less overlap between thin and thick filaments.
What is a Stretched Muscle?
This dark band of a sarcomere contains the entire length of the thick myosin filaments, including areas where actin overlaps.
What is the A-band?
This region in the center of the sarcomere contains only thick filaments, with no overlapping thin filaments.
What is the H-zone?
Muscle tissue containing intercalated discs.
What is Cardiac Muscle Tissue?
The covering of the muscle belly.
What is Epimysium?
A muscle in a neutral position.
What is a relaxed muscle?
This term describes muscle tissue that has a striped appearance under a microscope.
What is Striated muscle tissue?
The network of membranes which surround each myofibril in a muscle fiber.
What is a Sarcoplasmic Reticulum?
The specialized cell membrane that surrounds each individual skeletal muscle fiber.
What is the Sarcolemma?
The covering of a bundle of muscle fibers?
What is the Perimysium?
What part of the muscle moves towards the point of attachment when a muscle contracs?
What is Insertion?
This substance helps start muscle contraction by allowing the proteins in muscle fibers to interact.
What is Calcium?
This theory explains muscle contraction as thin filaments sliding past thick filaments, causing the sarcomere to shorten without the filaments themselves shrinking.
What is the Sliding Filament Configuration (Theory)?
The cell membrane that forms the outer boundary of a smooth muscle fiber.
What is the Plasmalemma?
This connective tissue covering of a muscle extends beyond the muscle fibers and helps form the tendons that attach muscle to bone.
What is the Epimysium? (again hehehe >:) )
This arrangement describes muscles that work in opposing pairs, where one contracts while the other relaxes and lengthens to produce movement.
What are Antagonistic Muscle Pairs?
Four (out of the six because I'm super generous) qualities of a muscle which could determine how they are named.
What are:
-Structure or Function
-Direction of the Fibers
-Size
-Location
-Shape
-Action That It Creates