Muscle Contraction

Last updated 24 days ago

15 questions

The explanation of how thick and thin filaments slide relative to one another during striated muscle contraction to decrease sarcomere length is referred to as the (3 words)

Muscle Contraction

Last updated 24 days ago

15 questions

What is this structure?

_______ diffusing in the cytoplasm between myosin and actin filaments of the muscle fibrils causes the filaments to slide into each other, triggering the contraction of the entire muscle fiber

The green area here represents the

This structure is called

The explanation of how thick and thin filaments slide relative to one another during striated muscle contraction to decrease sarcomere length is referred to as the (3 words)

Order the steps below in the correct sequence of muscle contraction.

Calcium is released from the sarcoplasmic reticulum.
Calcium binds to troponin on the actin filaments of muscle fibers. This signals tropomyosin to move out of the myosin binding sites on actin.
As a nerve impulse reaches the ends of an axon terminal, it stimulates the release of acetylcholine from synaptic vesicles.
An action potential is generated and travels along the sarcolemma
Acetylcholine then diffuses across the synaptic cleft and attaches to acetylcholine receptors on the sarcolemma at the neuromuscular junction.
After the cross-bridge forms, the myosin head rotates towards the center of the sarcomere. As it rotates, the myosin releases its ADP and phosphate.
Energized myosin heads, with an attached ADP molecule and phosphate group, bind to the open myosin binding sites on actin. This forms the actin-myosin cross-bridge.
This action slides the thin actin past the thick filament, creating the power stroke.
After the power stroke, the actin-myosin cross-bridge remains intact until an ATP molecule binds to the myosin head. After ATP attaches to myosin, the myosin detaches from actin.

Muscle cramps can be due to low levels of _____ . If these are deficient, the muscle cannot relax.

ATP is required for muscle contractions to relax.

If the starting length of a myofibril is 20mm in length, and after a solution of ATP and salt were applied, the final length of the myofibril is 11mm. What is the % contraction? (write the number only)

Muscle Contraction

The explanation of how thick and thin filaments slide relative to one another during striated muscle contraction to decrease sarcomere length is referred to as the (3 words)

Muscle Contraction

What is this structure?

The green area here represents the

This structure is called

This structure is called

The explanation of how thick and thin filaments slide relative to one another during striated muscle contraction to decrease sarcomere length is referred to as the (3 words)

Order the steps below in the correct sequence of muscle contraction.

Muscle cramps can be due to low levels of _____ . If these are deficient, the muscle cannot relax.

ATP is required for muscle contractions to relax.

If the starting length of a myofibril is 20mm in length, and after a solution of ATP and salt were applied, the final length of the myofibril is 11mm. What is the % contraction? (write the number only)

What is this structure?

What is this structure?

What is this structure?

This energy molecule is required for muscle contraction

What is this structure?

The green area here represents the

This structure is called

This structure is called

These molecules that assist with sarcomere contraction are

Order the steps below in the correct sequence of muscle contraction.

Muscle cramps can be due to low levels of _____ . If these are deficient, the muscle cannot relax.

ATP is required for muscle contractions to relax.

If the starting length of a myofibril is 20mm in length, and after a solution of ATP and salt were applied, the final length of the myofibril is 11mm. What is the % contraction? (write the number only)

What is this structure?

What is this structure?

This energy molecule is required for muscle contraction

What is this structure?

These molecules that assist with sarcomere contraction are