Quiz 8 Flashcards
Skeletal muscle is classified as:
striated , voluntary
Cardiac muscle is classified as:
striated, involuntary
Smooth muscle is classified as:
non-striated, involuntary
Tendons and aponeuroses are extensions of the epimysium that attach muscles to bones or other muscles
true
The more stable (moves less) attachment site of a muscle is the:
origin
The more movable attachment point of a muscle is the:
insertion
Partial constriction of an _____________ muscle helps to smooth, regulate the action of the agonist muscle.
antagonist
Cutaneous muscles have solid attachments to the underlying skeleton
false
The Linea alba is the aponeurosis that connects abdominal muscles at the ventral midline
true
The extensor muscle in the upper front limb sometimes used as an intramuscular injection site is the:
triceps brachii
The hip extensor muscle of the upper hind limb sometimes used as an intramuscular injection site is the:
biceps femoris
Skeletal muscles involved in respiration include:
-diaphragm
-abdominal muscles
-intercostal muscle
The functional unit of contraction in skeletal muscle is the:
myofibril
The neurotransmitter released into the synaptic space that initiates muscle contraction is:
acetylcholine
Every nerve fiber innervates only one skeletal muscle cell
false
