Match the statements/descriptors in the left-hand column with the appropriate sk

ID: 58358 • Letter: M

Question

Match the statements/descriptors in the left-hand column with the appropriate skeletal muscle component in the right-hand column.

Question 3 options:

actin

calcium

creatine

creatine phosphate

motor end plate

myoglobin

myosin

sarcolemma

sarcoplasmic reticulum

tropomyosin

troponin

individual globular molecules of this protein link end-to-end to form filamentous strings that look likes strings of pearls; two such strings of the filamentous form of the protein twist about one another to form the thin filaments of the myofibrils

ion that is released from the specialized smooth endoplasmic reticulum of the skeletal muscle fiber in response to spread of an action potential along the surface of the muscle fiber's plasma membrane

special name given to the plasma membrane that surrounds a skeletal muscle cell

another name for phosphocreatine

the NON calcium-binding regulatory protein that, by linking multiple copies of the protein together end-to-end, forms long linear polymers that associate with the thin filaments in skeletal muscle cells covering up the binding sites that myosin head groups are seeking to bind, thus preventing crossbridge formation and muscle contraction when cytosolic calcium levels are low

the protein that gives red or 'dark' meat its color

the regulatory protein that undergoes a conformational shape change when it binds calcium, leading to exposure of the actin binding sites that enables cross-bridge formation and muscle contraction to occur

the part of the skeletal muscle cell plasma membrane that lies in close proximity to the axon terminal of the somatic motor neuron and contains the receptors that bind the signaling molecule released into the neuromuscular junction by the somatic motor neuron

the calcium-binding regulatory protein that locks its non calcium-binding reguatory protein counterpart in place such that the actin binding sites that myosin head groups are seeking are covered up and not accessible when cytosolic calcium levels in the cell are low

protein whose individual molecules contain 2 subunits - each with a 'bulbous' paddle-like head group and a filamentous tail - that are linked together by the twisting of their tailpieces about one another; multiple molecules of this protein aggregate in specific fashion to form the thick filaments in the myofibrils of skeletal muscle cells

phosphate-binding protein made primarily in the liver and kidneys that is accumulated and stored in relatively high concentrations in the cytosol of skeletal muscle cells where it functions to bind phosphate groups when the cell is at rest, forming creatine phosphate, which can later serve as a donor of phosphate groups to rapidly regenerate ATP when muscle becomes active

oxygen-binding molecule synthesized and stored in the cytosol of skeletal muscle cells where it functions to 'store' oxygen within the cell for use in aerobic production of ATP (by Kreb cycle activity and subsequent ATP production via the electron transport chain using oxidative phosphorylation)

molecule that readily donates its phosphate group to ADP (formed when muscle becomes active & rapidly generates an abundance of ADP as it uses ATP to power contraction) to rapidly reform new ATP for sustained muscle activity until cellular ATP production can ramp up to meet the increased energy demands

sub-cellular organelle found in skeletal muscle cells that essentially functions as a big 'storage closet' for hiding/sequestering large amounts of calcium, thus keeping cytosolic calcium levels low when the skeletal muscle cell is unstimulated and relaxed

specialized smooth endoplasmic reticulum found in skeletal muscle cells

actin

calcium

creatine

creatine phosphate

motor end plate

myoglobin

myosin

sarcolemma

sarcoplasmic reticulum

10.

tropomyosin

11.

troponin

Explanation / Answer

actin - individual globular molecules of this protein link end-to-end to form filamentous strings that look likes strings of pearls; two such strin

calcium - ion that is released from the specialized smooth endoplasmic reticulum of the skeletal muscle fiber in response to spread of an action potentia

creatine - the protein that gives red or 'dark' meat its color

creatine phosphate - another name for phosphocreatine

motor end plate - the part of the skeletal muscle cell plasma membrane that lies in close proximity to the axon terminal of the somatic motor neuron and c

myoglobin-oxygen-binding molecule synthesized and stored in the cytosol of skeletal muscle cells where it functions to 'store' oxygen

myosin - protein whose individual molecules contain 2 subunits - each with a 'bulbous' paddle-like head group and a filamentous tail - that are linked tog

sarcolemma - special name given to the plasma membrane that surrounds a skeletal muscle cell

sarcoplasmic reticulum -specialized smooth endoplasmic reticulum found in skeletal muscle cells

tropomyosin - the NON calcium-binding regulatory protein that, by linking multiple copies of the protein together end-to-end, forms long linear polymers tha

troponin - the calcium-binding regulatory protein that locks its non calcium-binding reguatory protein counterpart in place such that the actin binding

the regulatory protein that undergoes a conformational shape change when it binds calcium, leading to exposure of the actin binding sites that