sarcomere
a sarcomere is defined as the distance between 2 ____
z discs
which neurotransmitter is released from motor neurons and is received in the motor end plate?
acetylcholine
muscles attach to bones via___
tendons
which muscle tissue can be controlled voluntarily?
skeletal muscle
Does glycolysis happen in the mitochondria?
No
muscles move by the sliding of _____ proteins over myosin proteins
actin
which of these structures stores calcium ion?
-sarcolemma
-sarcomere
-sarcoplasmic reticulum
-myoglobin
sarcoplasmic reticulum
pivot joints are ____
-nonaxial
-uniaxial
-multiaxial
-quadraxial
uniaxial
which layer of connective tissue cover individual muscle fibers?
endomysium
What is the longest lasting form of ATP production?
Aerobic respiration
which of these protein binds to the active site of actin proteins?
- dystrophin
- titin
- tropomyosin
- troponin
tropomyosin
action potentials in myocytes are spread via which structures?
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
a motor neuron and every myofiber it innervates is known as a ___ ___
motor unit
Creatine phosphate donates its ____ group to ADP, making ATP
Phosphate
What protein dissects the H zone?
M line
Voltage gated ion channels in the SR are activated by____
Action potential/ sodium ion
which structure is made of a synovial membrane and synovial fluid, and is placed between parallel structures to prevent friction
bursa
“Brachialis” is naming the muscle based on ___
location
Muscles lengthen in an _____ contraction
_____ contraction is similar to hitting the brakes on your car
(same answer)
Eccentric
How does the structure of the sarcomere explain why the I band changes during contraction, but the A band does not?
Myosin filaments are held in place by the M line and do not move, while actin filaments are only held to the myosin by elastic fibers and z discs, letting them slide
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
The constant slight contraction that maintains posture is called _____
Tone
When the subsequent stimulus ‘adds’ to the first, causing a larger contraction, what is this called?
Wave summation