Question 1

Which connective tissue sheath surrounds an entire skeletal muscle and is continuous with the tendon?

Accepted Answer

Epimysium

Question 2

A patient presents with muscle weakness and muscle tissue replaced by fat and connective tissue. Which disorder is most likely?

Accepted Answer

Duchenne muscular dystrophy

Question 3

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

Accepted Answer

It stores and releases calcium ions to trigger muscle contraction.

Question 4

During a biceps curl, as the muscle shortens to lift the weight, what type of contraction is occurring?

Accepted Answer

Concentric contraction

Question 5

Which of the following is TRUE regarding the sliding filament mechanism of muscle contraction?

Accepted Answer

Z discs move closer together as sarcomeres shorten.

Question 6

Which muscle fiber type is most resistant to fatigue and is best suited for endurance activities?

Accepted Answer

Slow oxidative fibers

Question 7

A muscle fiber is observed to have a large diameter, few mitochondria, and contracts rapidly but fatigues quickly. Which type is it?

Accepted Answer

Fast glycolytic fiber

Question 8

Which of the following best describes the role of T tubules in skeletal muscle fibers?

Accepted Answer

They conduct electrical impulses deep into the muscle fiber.

Question 9

Which of the following is a correct pairing of muscle type and its control mechanism?

Accepted Answer

Smooth muscle – involuntary

Question 10

A muscle is attached to two bones. The attachment site that moves during contraction is called the:

Accepted Answer

Insertion

Question 11

Which of the following best explains why muscle tone is important for joint stability?

Accepted Answer

Muscle tone helps stabilize synovial joints by keeping tension on tendons.

Question 12

Which of the following is the correct sequence of structures from largest to smallest in skeletal muscle?

Accepted Answer

Fascicle, muscle fiber, myofibril, myofilament

Question 13

Which of the following is a property of muscle tissue that allows it to return to its original length after being stretched?

Accepted Answer

Elasticity

Question 14

Which of the following best describes the function of myoglobin in muscle fibers?

Accepted Answer

It binds oxygen for aerobic metabolism.

Question 15

A muscle fiber is stimulated by a motor neuron at the neuromuscular junction. Which neurotransmitter is released to initiate contraction?

Accepted Answer

Acetylcholine

Question 16

Which of the following is TRUE regarding the arrangement of myofilaments in a sarcomere?

Accepted Answer

Thin filaments extend from the Z disc toward the center.

Question 17

Which of the following muscle fiber types would be most prevalent in the leg muscles of a marathon runner?

Accepted Answer

Slow oxidative fibers

Question 18

Which of the following best describes the role of ATP in muscle contraction?

Accepted Answer

ATP is required for myosin head detachment from actin.

Question 19

Which of the following is a characteristic of cardiac muscle but NOT skeletal muscle?

Accepted Answer

Involuntary contraction

Question 20

A muscle is stretched by substances within a hollow organ, such as food in the stomach. Which property of muscle tissue does this demonstrate?

Accepted Answer

Extensibility

The Muscular System: Structure, Function, and Types of Muscle Tissue

Study Guide - Practice Questions