Muscle Contraction Crash Course Quiz

Actin and myosin belong to which group of biological molecules?

• Proteins

• Carbohydrates

• Lipids

• Nucleic Acid

Which of the following statements correctly describes how muscles avoid being torn apart during use?

• Rope-like muscle is so strong it doesn't need any other supports.

• Rope-like connective tissue wraps delicate muscle fibers.

• Rope-like muscle tissue is wrapped with connective tissue that holds it together.

• Muscles are easily torn during use despite their strength.

Which of the following correctly describes ATP?

• It is a component of carbohydrates.

• It is the major energy molecule in the cell.

• You cannot make it, only eat it.

Tags

NGSS.HS-LS1-7

When is a new molecule of ATP required?

• When myosin pulls on actin.

• To cause myosin to let go of actin.

• When myosin moves back to its "loaded spring" position.

When does myosin stop its bind, pull, release, bind, pull, release........ cycle?

• When the calcium gets removed from the cytoplasm.

• When the myosin gets tired.

• When new ATP is produced.

• When more calcium gets released into the cytoplasm.

Muscles never _____________, they always _____________________.

• push; pull

• pull; push

Tags

NGSS.MS-PS2-1

When the muscle contracts, the bone that moves is called the muscle’s ___________________ point.

• origin

• insertion

• none of these answers are correct.

The bone that doesn’t move or moves less is called the ___________________.

• origin

• insertion

The collection of muscles fibers activated by a single neuron is known as a __________ .

• myofibril

• motor unit

Which step is the first step of the chemical reaction required to cause a muscle to contract after the neurotransmitter is released?

• Action potential generated is propagated along the sacrolemma and down the T tubules.

• Action potential triggers calcium release from terminal cisternae of SR.

• Removal of calcium by active transport into the SR after the action potential ends.