Question 1

Which of the following synovial joint types allows movement in two planes, such as flexion/extension and abduction/adduction, but not rotation?

Accepted Answer

Condyloid (ellipsoid) joint

Question 2

A patient presents with difficulty abducting their arm at the shoulder. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 3

Which connective tissue covering surrounds an individual muscle fiber?

Accepted Answer

Endomysium

Question 4

During a muscle contraction, which band in the sarcomere does NOT change length?

Accepted Answer

A band

Question 5

Which equation best represents the relationship between force ($$F$$), cross-sectional area ($$A$$), and muscle tension ($$T$$)?

Accepted Answer

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

Question 6

A soccer player suffers a tear in the quadriceps femoris group. Which muscle is NOT part of this group?

Accepted Answer

Biceps femoris

Question 7

Which structure is responsible for storing and releasing calcium ions during muscle contraction?

Accepted Answer

Sarcoplasmic reticulum

Question 8

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

Accepted Answer

Brachialis

Question 9

Which of the following best describes the movement allowed by a pivot joint?

Accepted Answer

Rotation around a single axis

Question 10

Which muscle is primarily responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 11

If the sarcolemma is damaged, which process would be most directly affected?

Accepted Answer

Transmission of action potentials

Question 12

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

Accepted Answer

Epimysium, perimysium, endomysium

Question 13

Which muscle is located in the abdominal wall and is responsible for compressing the abdomen?

Accepted Answer

Transverse abdominis

Question 14

Which of the following best describes the function of acetylcholine at the neuromuscular junction?

Accepted Answer

It initiates depolarization of the muscle fiber membrane

Question 15

A patient has difficulty extending their knee. Which muscle group is most likely affected?

Accepted Answer

Quadriceps femoris

Question 16

Which equation correctly represents the calculation of muscle force ($$F) $$given muscle tension ($$T) $$and cross-sectional area ($$A$$)?

Accepted Answer

$$F = T 	imes A$$

Question 17

Which muscle is part of the hamstring group and is responsible for flexing the leg at the knee?

Accepted Answer

Semitendinosus

Question 18

Which of the following structures is the site where a motor neuron communicates with a muscle fiber?

Accepted Answer

Neuromuscular junction

Question 19

Which muscle is responsible for elevating the shoulders (shrugging)?

Accepted Answer

Trapezius

Question 20

A patient is unable to rotate their head to the opposite side. Which muscle is most likely impaired?

Accepted Answer

Sternocleidomastoid

Skeletal Muscle Cells, Synovial Joints, and Major Skeletal Muscles: Study Guide

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