Arm Anatomy Quiz

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Questions and Answers

Which nerve predominantly innervates the muscles in the anterior compartment of the arm?

  • Musculocutaneous nerve (correct)
  • Axillary nerve
  • Ulnar nerve
  • Radial nerve

Which muscle is not part of the anterior compartment of the arm?

  • Brachialis
  • Triceps brachii (correct)
  • Biceps brachii
  • Coracobrachialis

Which muscle acts as a powerful supinator of the forearm with a flexed elbow?

  • Brachialis
  • Coracobrachialis
  • Biceps brachii (correct)
  • Triceps brachii

What is the origin of the long head of the biceps brachii muscle?

<p>Supraglenoid tubercle of scapula (B)</p> Signup and view all the answers

Which nerve innervates the coracobrachialis muscle?

<p>Musculocutaneous nerve (C)</p> Signup and view all the answers

What is the main function of bone in the human body?

<p>To provide protection for vital structures (B)</p> Signup and view all the answers

What is the function of cartilage in the skeletal system?

<p>To provide cushioning and support at joint surfaces (B)</p> Signup and view all the answers

Which system is responsible for the transportation of oxygen, nutrients, and waste products throughout the body?

<p>The cardiovascular system (A)</p> Signup and view all the answers

Where are new blood cells primarily produced in the human body?

<p>Within the marrow of many bones (B)</p> Signup and view all the answers

Which system is responsible for eliminating waste products from the body?

<p>The urinary system (A)</p> Signup and view all the answers

Flashcards

Anterior arm muscles' nerve

The musculocutaneous nerve primarily innervates muscles in the anterior compartment of the arm.

Non-anterior arm muscle

The triceps brachii is not part of the anterior compartment of the arm.

Forearm supinator (elbow flexed)

Biceps brachii is a powerful supinator of the forearm when the elbow is flexed.

Biceps brachii origin

The long head of the biceps brachii originates from the supraglenoid tubercle of the scapula.

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Coracobrachialis nerve

The musculocutaneous nerve innervates the coracobrachialis muscle.

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Bone's primary function

Bones protect vital organs in the body.

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Cartilage's function

Cartilage cushions and supports joint surfaces.

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Body's transport system

The cardiovascular system transports oxygen, nutrients, and waste throughout the body.

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Blood cell production site

Bone marrow produces blood cells.

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Waste removal system

The urinary system removes waste from the body.

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Study Notes

Anatomical Position

  • The body is in a standing position with head, eyes, and toes directed forward.
  • Upper limbs are positioned by the sides with palms facing forward.
  • Lower limbs are kept close together, feet parallel, and toes directed forward.

Anatomical Terms

  • Anterior (frontal): Refers to the front of the body.
  • Posterior (dorsal): Refers to the back of the body.
  • Superior: Indicates a position towards the head.
  • Inferior: Indicates a position towards the feet.

Proximity Terms

  • Proximal (nearest): Indicates a point closer to the root; for example, the elbow is proximal to the wrist.
  • Distal (remote): Indicates a point farther from the root; for example, the elbow is distal to the shoulder joint.

Plane and Position Terms

  • Median: Describes a point on the midsagittal or median plane.
  • Medial: Refers to a position closer to the midsagittal plane than another point.
  • Lateral: Indicates a position farther from the midsagittal plane; for instance, the outer side of the elbow is lateral to its inner side.

Studying Anatomy

  • Regional anatomy involves organizing the body into specific parts: head, neck, trunk (further divided into thorax, abdomen, pelvis/perineum, and back), and paired upper and lower limbs.

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