Match each definition in the first column to the correct term in the second column.
-Caused by a neuron,stimulating muscle cells to contract.

Question

Quizplus · Accepted Answer

Muscle twitch refers to the brief contraction of muscle fibers caused by a single neuron.

Answer: J
 Calcium ions are released from the sarcoplasmic reticulum in response to a neuron signal, which triggers muscle contraction.

Answer: A
 Lactic acid is a byproduct of cellular respiration in muscle cells during anaerobic exercise.

Answer: B
 Transverse tubules are invaginations of the cell membrane in muscle fibers that allow for the rapid spread of neuron signals throughout the cell.

Answer: C
 Tendons are connective tissues that attach muscles to bones.

Answer: E
 Fast twitch muscle fibers are able to contract quickly and forcefully, but fatigue more easily and are used for rapid, powerful movements.

Answer: F
 Tropomyosin is a protein that regulates muscle contraction by blocking the myosin-binding sites on actin molecules.

Answer: G
 Myosin is a motor protein that interacts with actin to generate force during muscle contraction.

Answer: H
 Troponin is a protein complex that binds to calcium ions and is involved in the regulation of muscle contraction.

Answer: I
 Slow twitch muscle fibers have a higher capacity for aerobic respiration and are used for endurance activities such as running long distances.

Answer: K
 Actin is a protein that interacts with myosin to generate force during muscle contraction.

Match Each Definition in the First Column to the Correct