Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
What are muscles called and why are they called this?
|
the machines of the body because they do all of the body's work
|
|
|
What are muscles functions?
|
they provide movement by contracting and relaxing
muscles maintain posture by attaching themselves to bones and holding them up and moving them to generate body heat by moving |
|
|
How do muscles work?
|
they tend to work in pairs. one muscle contracts while the other relaxes.
|
|
|
What are the three types of muscles?
|
skeletal
cardiac smooth |
|
|
Where are skeletal muscle tissues found? Do they have striations? Are they voluntary?
|
found in the muscles that are attached to bones
have striations is voluntary |
|
|
Where are cardiac muscle tissues found? Do they have striations? Are they voluntary?
|
found only in the heart
have striations is involuntary |
|
|
Where are smooth muscle tissues found? Do they have striations? Are they voluntary?
|
found in the walls of hollow organs (stomach, urinary bladder, respiratory passage)
have striations is involuntary |
|
|
What are skeletal muscles composed of?
|
skeletal muscle tissue, nervous tissue, connective tissue, and blood
|
|
|
What is a fascia?
|
a layer of fibrous connective tissue that surrounds each muscle
|
|
|
What is the epimysium?
|
another tough layer of connective tissue under the fascia that surrounds the muscle fibers; surrounds a skeletal muscle
|
|
|
What is a perimysium?
|
a layer of connective tissue that separates the muscle fibers into small compartments or bundles
|
|
|
What are fascicles?
|
bundles of muscle cells (fibers)
|
|
|
What is an endomysium?
|
a thin layer of connective tissue that surrounds each muscle fiber
|
|
|
What is a skeletal muscle fiber?
|
a long cylinder shaped cell that contracts in response to stimulation and relaxes when it's over
|
|
|
What is a myofibril?
|
bundles of rodlike filaments which makes up a fiber
|
|
|
What are myofibrils composed of?
|
alternating light and dark filaments called myosin (thick)and actin (thin)
|
|
|
What are myofiliments?
|
light and dark filaments
|
|
|
What is a tendon?
|
a cordlike part that attaches a muscle to a bone
|
