Question 1

Which of the following correctly lists the layers of connective tissue surrounding a skeletal muscle from outermost to innermost?

Accepted Answer

Epimysium, Perimysium, Endomysium

Question 2

A patient is unable to flex their forearm at the elbow. Which nerve is most likely damaged?

Accepted Answer

Musculocutaneous nerve

Question 3

Which ion is primarily responsible for initiating muscle contraction by binding to troponin?

Accepted Answer

Ca$^{2+}$

Question 4

During a muscle contraction, which event occurs at the neuromuscular junction?

Accepted Answer

Release of acetylcholine from the motor neuron

Question 5

Which muscle is primarily responsible for chewing (mastication)?

Accepted Answer

Masseter

Question 6

What is the smallest functional unit of a skeletal muscle?

Accepted Answer

Sarcomere

Question 7

Which of the following best describes the role of sodium ions (Na$^+$) during muscle contraction?

Accepted Answer

They depolarize the muscle fiber membrane, generating an action potential.

Question 8

A trumpet player uses which muscle to purse their lips and play their instrument?

Accepted Answer

Orbicularis oris

Question 9

Which structure attaches muscle to bone?

Accepted Answer

Tendon

Question 10

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

Accepted Answer

Hormone secretion

Question 11

Which muscle is responsible for inhalation by contracting and increasing thoracic volume?

Accepted Answer

Diaphragm

Question 12

Which of the following best describes the difference between an agonist and an antagonist muscle?

Accepted Answer

Agonists produce movement, antagonists oppose movement.

Question 13

Which muscle group is located on the dorsal side of the forearm and is responsible for wrist extension?

Accepted Answer

Extensor group

Question 14

Which of the following ions is most important for repolarizing the muscle cell membrane after contraction?

Accepted Answer

K$^+$

Question 15

A blood sample is most commonly obtained from which anatomical site?

Accepted Answer

Median cubital vein

Question 16

Which muscle is part of the rotator cuff and is responsible for abduction of the arm?

Accepted Answer

Supraspinatus

Question 17

Which structure is known as the 'heel bone' and serves as the attachment for the Achilles tendon?

Accepted Answer

Calcaneus

Question 18

Which of the following best describes muscle tone?

Accepted Answer

The continuous and passive partial contraction of muscles

Question 19

Which of the following is the correct formula for calculating muscle tension ($T$) given force ($F$) and cross-sectional area ($A$)?

Accepted Answer

$T = \frac{F}{A}$

Question 20

A patient presents with weakness in dorsiflexion of the foot. Which muscle is most likely affected?

Accepted Answer

Tibialis anterior

Muscular System: Structure, Function, and Anatomy Study Notes

Study Guide - Practice Questions