Q: Which equation correctly represents the breakdown of ATP during muscle contraction?

$\mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{Pi} + \text{energy}$

Question 1

Which of the following best describes a synovial joint?

Accepted Answer

A joint where bones are separated by a fluid-filled cavity and allow free movement.

Question 2

Which movement is allowed by synovial joints and involves moving a limb away from the midline of the body?

Accepted Answer

Abduction

Question 3

During muscle contraction, what happens to the I band and H zone?

Accepted Answer

Both the I band and H zone decrease in width.

Question 4

Which of the following is NOT a general feature of synovial joints?

Accepted Answer

Epiphyseal plate

Question 5

A patient presents with muscle fatigue after high-intensity exercise. Which process is primarily responsible for supplying energy during this activity?

Accepted Answer

Anaerobic pathways

Question 6

Which equation correctly represents the breakdown of ATP during muscle contraction?

Accepted Answer

$\mathrm{ATP} ightarrow \mathrm{ADP} + \mathrm{Pi} + 	ext{energy}$

Question 7

Which of the following best describes the refractory period in muscle fiber excitation?

Accepted Answer

The time when a muscle fiber cannot respond to a second stimulus.

Question 8

Which structure is unique to skeletal muscle fibers and is responsible for transmitting action potentials deep into the muscle cell?

Accepted Answer

T tubules

Question 9

A patient with myasthenia gravis has impaired transmission at the neuromuscular junction (NMJ). Which component is most likely affected?

Accepted Answer

Acetylcholine receptors on the motor end plate

Question 10

Which of the following is a correct sequence of events in excitation-contraction coupling?

Accepted Answer

Depolarization of the sarcolemma $\rightarrow$ release of calcium from the sarcoplasmic reticulum $\rightarrow$ cross-bridge formation

Question 11

Which type of muscle tissue contains intercalated discs and is responsible for involuntary rhythmic contractions?

Accepted Answer

Cardiac muscle

Question 12

Which of the following is a function of the connective tissue sheaths in skeletal muscle?

Accepted Answer

Transmitting force generated by muscle fibers to tendons

Question 13

Which protein is primarily responsible for the elastic recoil of muscle fibers after contraction?

Accepted Answer

Titin

Question 14

Which of the following best explains why smooth muscle can sustain contractions for longer periods than skeletal muscle?

Accepted Answer

Smooth muscle uses less ATP per contraction.

Question 15

A marathon runner is experiencing EPOC (excess post-exercise oxygen consumption). Which process is occurring during EPOC?

Accepted Answer

Lactic acid is being converted back to pyruvate.

Question 16

Which of the following is a difference between skeletal and smooth muscle fibers?

Accepted Answer

Skeletal muscle fibers are multinucleated, while smooth muscle fibers have a single nucleus.

Question 17

Which of the following correctly matches the muscle tissue type with its primary function?

Accepted Answer

Smooth muscle: movement of food through the digestive tract

Question 18

Which of the following is true regarding the cross-bridge cycle in muscle contraction?

Accepted Answer

Release of ADP and Pi from myosin causes the power stroke.

Question 19

A patient is unable to generate action potentials in their muscle fibers. Which structure is most likely malfunctioning?

Accepted Answer

Sarcolemma

Question 20

Which of the following is a correct comparison of the three types of muscle tissue?

Accepted Answer

Skeletal muscle is striated and voluntary; cardiac muscle is striated and involuntary; smooth muscle is non-striated and involuntary.

Study Guide: Synovial Joints and Muscle Tissue (Chapters 8 & 9)

Study Guide - Practice Questions

Study Guide - Flashcards