sarcomere
a sarcomere is defined as the distance between ____
-m lines
-t tubules
-z discs
-a bands
z lines
which of these neurotransmitters is released from motor neurons and are received in the motor end plate?
-sodium ion
-calcium ion
-dopamine
-acetylcholine
acetylcholine
muscles attach to bones via___
-tendons
-ligaments
-epimysium
-bursae
tendons
which of these muscle tissues can be controlled voluntarily?
-smooth muscle
-cardiac muscle
-skeletal muscle
-epithelial muscle
skeletal muscle
which of these proteins binds to the active site of actin proteins?
-dystrophin
-tropomyosin
-titin
-m line
tropomyosin
which of these structures stores calcium ion?
-sarcolemma
-sarcomere
-sarcoplasmic reticulum
-motor end plate
sarcoplasmic reticulum
pivot joints are ____
-nonaxial
-uniaxial
-multiaxial
-quadraxial
uniaxial
a muscle cell is also known as a___
myofiber
muscles move by the sliding of _____ proteins over myosin proteins
-actin
-dystrophin
-titin
-myosin
actin
action potentials are spread via which of the following structures?
-myofibrils
-sarcoplasmic reticulum
-motor end plate
-t tubules
t tubules
which of these is not a function of synovial joint capsules?
-providing nutrients to articular cartilage
-preventing friction from articulating bones
-joint stability
-muscle insertion points
muscle insertion points
which of these layers of connective tissue cover individual muscle fibers?
-epimysium
-endomysium
-perimysium
-sarcolemma
endomysium
which of these regions contain ONLY myosin?
-a bands
-i bands
-z discs
-h zones
h zones
muscle cell membrane potential is increased by ____
-sodium ion
-calcium ion
-troponin-c
-potassium ion
sodium ion
a bursa would be located
-wrapping around a tendon
-between/ connecting the articular ends of two long bones
-between two adjacent skull bones
-between two parallel structures like a tendon and a bone
between two parallel structures like a tendon and a bone
which of these activities will mostly involve slow oxidative fibers?
-sprinting
-heavy weight lifting
-sleeping
-jogging
jogging
pushing against a door and successfully moving it is a(n) ____ movement
-concentric
-eccentric
-isometric
-monocentric
which of these proteins is directly activated by calcium ion?
-actin
-troponin-c
-tropomyosin
-voltage gated calcium ion channels
troponin-c
which of these processes take place in the cytoplasm?
-the spread of action potentials
-cross bridge formation
-calcium ion release
-power stroke
calcium ion release
which of these joints is synathrotic?
-syndesmoses
-synchondroses
-synovial
-symphysis
synchondroses
a motor neuron and every myofiber it innervates is known as a ___ ___
motor unit
the ability of muscle to lengthen is called ____
extensibility