Question 1

Which connective tissue layer directly surrounds individual muscle fibers within a skeletal muscle?

Accepted Answer

Endomysium

Question 2

During a biceps curl, which muscle acts as the antagonist?

Accepted Answer

Triceps brachii

Question 3

What is the primary function of the sarcoplasmic reticulum in skeletal muscle fibers?

Accepted Answer

Storing and releasing calcium ions

Question 4

Which structure is the cytoplasm of a muscle fiber?

Accepted Answer

Sarcoplasm

Question 5

In the lever system of muscle movement, what does the fulcrum represent?

Accepted Answer

The joint

Question 6

Which protein forms the thick myofilaments in skeletal muscle?

Accepted Answer

Myosin

Question 7

If the effort applied to a lever system is less than the resistance, what will happen?

Accepted Answer

No movement will occur

Question 8

Which of the following best describes the role of synergist muscles?

Accepted Answer

They help the agonist and prevent undesirable motions

Question 9

Which band in the sarcomere contains only thick myofilaments?

Accepted Answer

H zone

Question 10

What is the function of tendons in the musculoskeletal system?

Accepted Answer

Connect muscle to bone

Question 11

Which of the following equations correctly represents the relationship in a lever system for movement?

Accepted Answer

$Effort > Resistance$

Question 12

Which connective tissue surrounds a bundle of muscle fibers (fascicle) within a skeletal muscle?

Accepted Answer

Perimysium

Question 13

Which of the following is NOT a part of the skeletal muscle fiber structure?

Accepted Answer

Perimysium

Question 14

What is the main function of aponeuroses in the musculoskeletal system?

Accepted Answer

Serve as flat sheets of dense regular connective tissue

Question 15

Which of the following correctly matches the muscle and its role during extension of the forearm?

Accepted Answer

Agonist: triceps brachii

Question 16

Which structure is responsible for transmitting the action potential deep into the muscle fiber?

Accepted Answer

T-tubules

Question 17

Which of the following is a real-world example of a first-class lever in the human body?

Accepted Answer

Extension of the neck (nodding)

Question 18

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

Accepted Answer

Epimysium, Perimysium, Endomysium

Question 19

Which of the following statements about the A band in a sarcomere is correct?

Accepted Answer

It is the region where thick and thin myofilaments overlap

Question 20

If a muscle contracts and the effort applied is 50 N while the resistance is 40 N, will movement occur? Use the lever system equation.

Accepted Answer

Yes, because $Effort > Resistance$

Muscular System: Structure, Connective Tissue, and Biomechanics

Study Guide - Practice Questions