Question 1

Which of the following best describes the main function of the fascia in skeletal muscle tissue?

Accepted Answer

It supports muscles, allows free movement, and carries nerves, blood vessels, and lymphatic vessels.

Question 2

A patient presents with muscle weakness and biopsy reveals muscle fibers replaced by fat and fibrous tissue. Genetic testing shows a mutation in the dystrophin gene. Which disease is most likely?

Accepted Answer

Duchenne muscular dystrophy

Question 3

Which connective tissue layer directly surrounds individual muscle fibers?

Accepted Answer

Endomysium

Question 4

Which property of muscle tissue allows it to return to its original length and shape after contraction or extension?

Accepted Answer

Elasticity

Question 5

The sarcomere is the basic functional unit of a myofibril. Which of the following correctly identifies the proteins that form the thick and thin filaments?

Accepted Answer

Thick filament: myosin; Thin filament: actin

Question 6

Which of the following best explains why skeletal muscle fibers are multinucleated?

Accepted Answer

They are formed by the fusion of multiple myoblasts during development.

Question 7

A muscle biopsy shows striated fibers with multiple peripheral nuclei. Which type of muscle is this?

Accepted Answer

Skeletal muscle

Question 8

Which of the following is a regulatory protein found in the thin filament of the sarcomere?

Accepted Answer

Troponin

Question 9

During muscle contraction, which region of the sarcomere shortens?

Accepted Answer

I band

Question 10

Which of the following best describes the role of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

It stores and releases calcium ions necessary for muscle contraction.

Question 11

A cross-section of the thigh reveals three compartments separated by fascia. Which compartment contains the vastus lateralis muscle?

Accepted Answer

Anterior compartment

Question 12

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

Accepted Answer

Synthesizing hormones

Question 13

Which protein is mutated in Duchenne muscular dystrophy, leading to muscle fiber degeneration?

Accepted Answer

Dystrophin

Question 14

Which of the following best describes the arrangement of myofibrils within a muscle fiber?

Accepted Answer

They are organized in parallel bundles running the length of the fiber.

Question 15

Which of the following is a structural protein that helps anchor thick filaments to the Z disc and provides elasticity to the sarcomere?

Accepted Answer

Titin

Question 16

Which property of muscle tissue is most directly responsible for shivering during cold exposure?

Accepted Answer

Contractility

Question 17

Which of the following best explains why smooth muscle can repair itself more readily than skeletal muscle?

Accepted Answer

Smooth muscle cells retain mitotic ability.

Question 18

Which of the following is the correct sequence of connective tissue layers from superficial to deep in a skeletal muscle?

Accepted Answer

Epimysium, perimysium, endomysium

Question 19

Which of the following best describes the function of satellite cells in skeletal muscle?

Accepted Answer

They assist in the repair and regeneration of damaged muscle fibers.

Question 20

Which of the following is a real-life example of the extensibility property of muscle tissue?

Accepted Answer

The stomach expanding after a large meal.

Muscular Tissue: Structure, Function, and Microscopic Anatomy

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