Question 1

Which of the following best describes the function of the retinaculum in the muscular system?

Accepted Answer

It is a band of fibrous tissue that holds down tendons at the wrist and ankle.

Question 2

A patient presents with muscle weakness and progressive difficulty walking. Laboratory tests reveal a genetic disorder affecting the structure of muscle fibers. Which disease is most likely?

Accepted Answer

Muscular dystrophy

Question 3

Which of the following is true regarding skeletal muscle fibers?

Accepted Answer

They are voluntary and contain multiple nuclei.

Question 4

The term 'biceps brachii' provides information about the muscle’s:

Accepted Answer

Location and number of origins

Question 5

During a physical exam, a percussion hammer is used to tap just below the patella. What is the expected normal response, and which muscle group is being tested?

Accepted Answer

Sudden involuntary contraction of the quadriceps femoris group, extending the lower leg

Question 6

Which of the following best describes the process of muscle contraction at the cellular level?

Accepted Answer

Calcium ions cause actin filaments to slide between myosin filaments, shortening the muscle fiber.

Question 7

A patient is diagnosed with an overuse injury from repetitive wrist flexion while pitching a baseball. Which condition is most likely present?

Accepted Answer

Pitcher’s elbow (medial epicondylitis)

Question 8

Which structure attaches a muscle to a bone and is composed of white fibrous connective tissue?

Accepted Answer

Tendon

Question 9

Which muscle is responsible for flexing the forearm at the elbow and has two heads of origin?

Accepted Answer

Biceps brachii

Question 10

A patient with limited mobility develops a permanent tightening of muscles, tendons, and skin that restricts movement. What is this condition called?

Accepted Answer

Contracture

Question 11

Which of the following best describes the function of a bursa?

Accepted Answer

It reduces friction where a tendon rubs against a bone.

Question 12

Which muscle is located directly above the temporal bone and is involved in chewing?

Accepted Answer

Temporalis

Question 13

Which of the following is NOT a function of the muscular system?

Accepted Answer

Forming a continuous layer around organs

Question 14

Which of the following best describes muscle tone?

Accepted Answer

A state of mild, partial contraction due to nerve impulses from the brain and spinal cord

Question 15

A newborn receives an intramuscular injection in the thigh. Why is this site chosen?

Accepted Answer

The thigh muscles are the largest muscles in a baby’s body.

Question 16

Which of the following best describes the difference between the origin and insertion of a muscle?

Accepted Answer

The origin attaches to a stationary bone, while the insertion attaches to the bone that moves during contraction.

Question 17

Which of the following muscle names indicates a muscle that straightens a body part?

Accepted Answer

Extensor digitorum

Question 18

A patient is unable to extend their fingers after an injury. Which structure is most likely damaged?

Accepted Answer

Extensor muscles of the forearm

Question 19

Which of the following best describes the role of acetylcholine at the neuromuscular junction?

Accepted Answer

It changes the permeability of the muscle fiber and triggers the release of calcium ions.

Question 20

Which of the following is a correct statement about the structure of a muscle fiber?

Accepted Answer

A muscle fiber is a long cell with multiple nuclei and contains myofibrils made of actin and myosin.

Study Guide: Medical Terminology – Muscular System (Orthopedics)

Guida di studio - Domande di pratica

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