Q: Which equation best represents the hydrolysis of ATP during muscle contraction?

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} \rightarrow \mathrm{ADP} + \mathrm{P}_i + \text{energy}$$

Question 1

Which of the following best describes an amphiarthrosis joint, and which is a correct example?

Accepted Answer

A slightly movable joint; pubic symphysis

Question 2

Which structure in a synovial joint is primarily responsible for reducing friction between articulating bones?

Accepted Answer

Articular cartilage

Question 3

A patient presents with swelling and pain in the knee after a sports injury. Which homeostatic imbalance is most likely, and what structure is commonly affected?

Accepted Answer

Bursitis; synovial membrane

Question 4

Which of the following correctly matches the type of synovial joint with its movement and example?

Accepted Answer

Pivot joint; rotation; atlas and axis

Question 5

During muscle contraction, which structure stores and releases calcium ions necessary for the process?

Accepted Answer

Sarcoplasmic reticulum

Question 6

Which equation best represents the hydrolysis of ATP during muscle contraction?

Accepted Answer

$$\mathrm{ATP} + \mathrm{H}_2\mathrm{O} ightarrow \mathrm{ADP} + \mathrm{P}_i + 	ext{energy}$$

Question 7

Which of the following best describes the sliding filament model of muscle contraction?

Accepted Answer

Actin filaments slide past myosin filaments, shortening the sarcomere

Question 8

Which process occurs first during the depolarization phase of a muscle cell action potential?

Accepted Answer

Voltage-gated sodium channels open

Question 9

A muscle that assists the prime mover by adding extra force or reducing unnecessary movement is called a:

Accepted Answer

Synergist

Question 10

Which of the following muscle names indicates the muscle's location and action?

Accepted Answer

Flexor carpi radialis

Question 11

Which factor does NOT influence the force of skeletal muscle contraction?

Accepted Answer

Type of synovial joint involved

Question 12

Which body movement is described as moving a limb away from the midline of the body?

Accepted Answer

Abduction

Question 13

Which of the following is a correct match between muscle location and its primary action?

Accepted Answer

Quadriceps femoris; extension of the knee

Question 14

Which of the following is NOT a criterion used in naming muscles?

Accepted Answer

Color

Question 15

Which of the following best describes the role of the antagonist muscle during movement?

Accepted Answer

It opposes the action of the prime mover

Question 16

Which of the following is a fibrous joint, and what is its main characteristic?

Accepted Answer

Suture; immovable

Question 17

Which step in muscle contraction directly requires ATP?

Accepted Answer

Detachment of myosin heads from actin

Question 18

Which of the following best explains repolarization in a muscle cell?

Accepted Answer

Potassium ions exit the cell, restoring negative membrane potential

Question 19

Which of the following is a cartilaginous joint, and what is its main function?

Accepted Answer

Intervertebral disc; slight movement and shock absorption

Question 20

A patient is unable to flex their forearm at the elbow. Which muscle is most likely impaired?

Accepted Answer

Biceps brachii

Joints and Muscles: Structure, Function, and Movement in Anatomy & Physiology

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