7. AXILLA & UPPER LIMB- DALLAR

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| By Ykaan2000

Ykaan2000

Community Contributor

Quizzes Created: 15 | Total Attempts: 11,456

Questions: 8 | Attempts: 158 | Updated: May 6, 2023

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8 SORUDAN 4 VEYA DAHA AZ BİLDİYSEN YENİDEN OKU!

Questions and Answers

1.

Biceps brachii muscle acts on 3 joints: shoulder, elbow & radio-ulnar joints.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The biceps brachii muscle is a muscle in the upper arm that acts on three joints: the shoulder joint, the elbow joint, and the radio-ulnar joint. This means that the muscle is involved in movements at all three of these joints, allowing for flexion at the shoulder and elbow joints, as well as supination at the radio-ulnar joint. Therefore, the statement that the biceps brachii muscle acts on three joints is true.

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2.

The skin on the palmar surfaces of lateral 3 ½ fingers is innervated by the ulnar nerve.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The skin on the palmar surfaces of lateral 3 ½ fingers is not innervated by the ulnar nerve.

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3.

Brachioradialis muscle flexes the wrist and is innervated by the median nerve.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The brachioradialis muscle does not flex the wrist. It is actually responsible for flexing the forearm at the elbow joint. It is innervated by the radial nerve, not the median nerve. Therefore, the statement is false.

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4.

The ulnar nerve is not a component of the cubital fossa.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The ulnar nerve is not a component of the cubital fossa. The cubital fossa is a triangular depression on the anterior aspect of the elbow, and it contains various structures such as the brachial artery, median nerve, and biceps tendon. The ulnar nerve, however, does not pass through or innervate the cubital fossa. It travels posterior to the medial epicondyle of the humerus and continues down the forearm. Therefore, the statement is true.

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5.

The radial nerve has only sensory functions in the hand, but no motor functions.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The radial nerve is responsible for providing sensory information to the hand, such as touch, temperature, and pain. However, it does not have any motor functions, meaning it does not control any muscles in the hand. Therefore, the statement is true.

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6.

The median nerve innervates the three thenar muscles.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The statement is true because the median nerve is responsible for innervating the three thenar muscles. The thenar muscles are located in the palm of the hand and are responsible for controlling movements of the thumb. The median nerve runs through the forearm and into the hand, supplying motor and sensory function to various muscles and areas of the hand. Therefore, it is correct to say that the median nerve innervates the three thenar muscles.

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7.

The cephalic vein arises from the medial side of the dorsal venous arch on the back of the hand.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
The statement is false because the cephalic vein actually arises from the lateral side of the dorsal venous arch on the back of the hand.

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8.

The pronator quadratus is the main pronator muscle.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The pronator quadratus is indeed the main pronator muscle. It is located in the forearm and plays a crucial role in pronation, which is the movement that turns the palm of the hand downward. This muscle works in conjunction with other muscles to rotate the radius bone in the forearm, allowing for the pronation motion. Therefore, the statement that the pronator quadratus is the main pronator muscle is correct.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

Current Version
May 06, 2023

Quiz Edited by
ProProfs Editorial Team
May 06, 2015

Quiz Created by
Ykaan2000

7. Axilla & Upper Limb- Dallar

Biceps brachii muscle acts on 3 joints: shoulder, elbow & radio-ulnar joints.

The skin on the palmar surfaces of lateral 3 ½ fingers is innervated by the ulnar nerve.

Brachioradialis muscle flexes the wrist and is innervated by the median nerve.

The ulnar nerve is not a component of the cubital fossa.

The radial nerve has only sensory functions in the hand, but no motor functions.

The median nerve innervates the three thenar muscles.

The cephalic vein arises from the medial side of the dorsal venous arch on the back of the hand.

The pronator quadratus is the main pronator muscle.