Question 1

Which muscle is primarily responsible for the extension of the elbow joint?

Accepted Answer

Triceps brachii

Question 2

What is the main action of the flexor digitorum superficialis muscle?

Accepted Answer

Flexes the wrist and middle phalanges

Question 3

Which muscle acts as a synergist in forearm flexion?

Accepted Answer

Brachioradialis

Question 4

If a patient cannot flex their thumb, which muscle is most likely impaired?

Accepted Answer

Flexor pollicis longus

Question 5

Which muscle group is responsible for extending the knee?

Accepted Answer

Quadriceps femoris

Question 6

What is the anatomical definition of abduction?

Accepted Answer

Movement of a limb away from the body's midline

Question 7

Which muscle is involved in pronating the forearm?

Accepted Answer

Pronator teres

Question 8

A soccer player suffers a tear in the muscle that flexes the knee and extends the thigh. Which muscle is most likely affected?

Accepted Answer

Biceps femoris

Question 9

Which muscle is responsible for plantar flexion of the foot?

Accepted Answer

Gastrocnemius

Question 10

What is the effect of contraction of the adductor longus muscle?

Accepted Answer

Adducts and flexes the thigh

Question 11

Which muscle inserts at the radius and is involved in supination of the forearm?

Accepted Answer

Biceps brachii

Question 12

During a biceps curl, which movement is primarily occurring at the elbow joint?

Accepted Answer

Flexion

Question 13

Which muscle is responsible for extending and abducting the wrist?

Accepted Answer

Extensor carpi radialis longus

Question 14

A patient presents with difficulty extending their fingers. Which muscle is most likely compromised?

Accepted Answer

Extensor digitorum

Question 15

Which muscle acts with the biceps brachii to supinate the forearm?

Accepted Answer

Supinator

Question 16

Which muscle group originates at the ischial tuberosity and is responsible for extending the thigh?

Accepted Answer

Hamstrings

Question 17

What is the primary action of the tibialis anterior muscle?

Accepted Answer

Dorsiflexion of the foot

Question 18

Which muscle is responsible for tensing the skin and fascia of the palm?

Accepted Answer

Palmaris longus

Question 19

If a patient cannot abduct their thumb, which muscle is most likely affected?

Accepted Answer

Abductor pollicis longus

Question 20

Which muscle is involved in flexing the distal phalanges of the fingers?

Accepted Answer

Flexor digitorum profundus

Gross Anatomy of the Muscular System: Arm & Leg Muscles

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