MT Quiz 5 Flashcards
(28 cards)
Sarcoplasmis reticulum stores and releases what ion?
Calcium ions
What type of athletes do you think would have more slow twitch fibers?
Endurance athletes
A contraction where the muscle DOES NOT change?
Isometric
Is actin or myosin part of the thin myofilament?
Actin
What is the skeletal muscle contractile unit?
Sarcomere
What is retinacula and where can you find it throughout the body?
Refers to any region on the body on the body in which tendon groups from different muscles pass under one connective tissue band.
What is the ability of a muscle to shorten called?
Contract
What does the epimysium do?
Fibrous tissue envelope that surrounds skeletal muscle. Layer of dense irregular connective tissue which ensheaths the entire muscle and protects muscles from friction against the other muscles and bones.
What is a word describing muscle and fascia?
Fibrous
What attaches muscle to bone?
Tendons
The ability of a muscle to lengthen is called?
Extensibility
What are motor end plates?
Neuromuscular junction
What is the process of motor unit activation based on need called?
Recruitment
What are red muscle fibers called?
Type 1/slow twitch
What color are fast twitch fibers?
White
What attachment is more movable?
insertion
What is a single motor neuron and all muscle fibers to which it attaches?
Motor unit
What does the golgi tendon organ do?
A proprioceptive sensory receptor organ that senses changes in muscle tension
What does the muscle spindle do?
Stretch receptor within the body of a muscle that primarily detects changes in the length of the muscle.
What is the sarcolemma?
Cell membrane
What does tonus mean?
The constant low-level activity of a body tissue, especially muscle tone.
What does biarticular mean?
Muscles that cross 2 joints rather than just 1 such as the hamstrings which cross both the hip and the knee.
What is the principal neurotransmitter involved in muscle contraction?
Acetylcholine
What is a spiral muscle?
Where certain fasciculi are crossed (traps, pec major)