Question 1

Which connective tissue sheath surrounds an individual muscle fiber in skeletal muscle?

Accepted Answer

Endomysium

Question 2

During a biceps curl, as you slowly lower the weight, your biceps muscle lengthens while generating force. What type of contraction is this?

Accepted Answer

Eccentric contraction

Question 3

Which of the following best describes the role of calcium ions ($$\mathrm{Ca$$^{2+}$$}) in $$skeletal muscle contraction?

Accepted Answer

They are released from the sarcoplasmic reticulum and trigger the sliding filament mechanism.

Question 4

Which muscle fiber type is most resistant to fatigue and is primarily used during endurance activities such as marathon running?

Accepted Answer

Slow oxidative fibers

Question 5

A patient presents with muscle weakness and enlarged calf muscles due to fat and connective tissue infiltration. Which disorder is most likely?

Accepted Answer

Duchenne muscular dystrophy

Question 6

Which of the following is TRUE regarding the sarcomere during muscle contraction?

Accepted Answer

The H zone disappears.

Question 7

Which structure is the plasma membrane of a muscle cell?

Accepted Answer

Sarcolemma

Question 8

What is the main function of the T-tubules in skeletal muscle fibers?

Accepted Answer

Transmit nerve impulses deep into the muscle fiber

Question 9

Which of the following best describes the arrangement of thick and thin filaments in a sarcomere?

Accepted Answer

Thin filaments extend from the Z disc toward the center, thick filaments are in the center overlapping thin filaments.

Question 10

Which of the following is a function of skeletal muscle tissue?

Accepted Answer

Moving bones to produce body movement

Question 11

Which prefix is commonly used in anatomical terms to refer to muscle?

Accepted Answer

Myo-

Question 12

Which of the following muscle types is NOT striated?

Accepted Answer

Smooth muscle

Question 13

Which of the following best explains why muscle contractions help maintain body temperature?

Accepted Answer

Muscle contractions produce heat as a byproduct of ATP hydrolysis.

Question 14

Which of the following is the correct order of connective tissue sheaths from outermost to innermost in a skeletal muscle?

Accepted Answer

Epimysium, perimysium, endomysium

Question 15

Which of the following statements about fast glycolytic muscle fibers is TRUE?

Accepted Answer

They are adapted for rapid, powerful contractions and fatigue quickly.

Question 16

A muscle fiber is stimulated by a motor neuron at which specific location?

Accepted Answer

Neuromuscular junction

Question 17

Which of the following best describes the function of the perimysium?

Accepted Answer

Surrounds each fascicle (group of muscle fibers)

Question 18

Which of the following is a characteristic of cardiac muscle tissue?

Accepted Answer

Cells are striated and contraction is involuntary

Question 19

Which of the following is the correct equation for ATP hydrolysis during muscle contraction?

Accepted Answer

$$\mathrm{ATP \rightarrow ADP + P_i + energy}$$

Question 20

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

Accepted Answer

It stores and releases calcium ions to trigger contraction.

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

Study Guide - Practice Questions