Question 1

Which of the following best describes the microscopic appearance of cardiac muscle tissue?

Accepted Answer

Long, cylindrical, multinucleated fibers with obvious striations and intercalated discs

Question 2

Which muscle is primarily responsible for flexing the forearm at the elbow joint?

Accepted Answer

Biceps brachii

Question 3

A patient is unable to abduct their arm at the shoulder. Which muscle is most likely injured?

Accepted Answer

Deltoid

Question 4

Which of the following best defines the 'origin' of a muscle?

Accepted Answer

The attachment site that remains relatively stationary during muscle contraction

Question 5

Which muscle is an antagonist to the biceps brachii during elbow flexion?

Accepted Answer

Triceps brachii

Question 6

A person is having difficulty with forced expiration, such as blowing up a balloon. Which muscle group is most likely weak?

Accepted Answer

Internal intercostals

Question 7

Which of the following muscles is NOT part of the quadriceps femoris group?

Accepted Answer

Biceps femoris

Question 8

Which muscle is primarily responsible for plantar flexion of the foot at the ankle?

Accepted Answer

Gastrocnemius

Question 9

During a sit-up, which muscle acts as the primary agonist for trunk flexion?

Accepted Answer

Rectus abdominis

Question 10

Which of the following best describes a 'synergist' in muscle action?

Accepted Answer

A muscle that assists the prime mover in performing its action

Question 11

A patient presents with difficulty turning their head to the opposite side. Which muscle is most likely affected?

Accepted Answer

Sternocleidomastoid

Question 12

Which muscle is responsible for elevating the mandible during chewing?

Accepted Answer

Masseter

Question 13

Which of the following is a function of the external oblique muscle?

Accepted Answer

Rotation and lateral flexion of the trunk

Question 14

Which muscle is the primary mover for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 15

A soccer player tears their semimembranosus muscle. Which movement will be most affected?

Accepted Answer

Flexion of the knee

Question 16

Which of the following best describes the function of tendons?

Accepted Answer

Connect muscle to bone and transmit the force of muscle contraction

Question 17

Which muscle is responsible for adduction of the thigh at the hip joint?

Accepted Answer

Adductor longus

Question 18

Which of the following is a characteristic unique to smooth muscle tissue?

Accepted Answer

Cells are spindle-shaped and lack striations

Question 19

A patient is unable to retract their scapula. Which muscle is most likely weak?

Accepted Answer

Trapezius

Question 20

Which muscle is primarily responsible for inspiration (inhalation) during quiet breathing?

Accepted Answer

Diaphragm

Overview of Muscle Tissue and Major Skeletal Muscles

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