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Chapter 38: Q. 18 (page 1120)

The elbow is an example of which type of joint?

  1. hinge
  2. pivot
  3. saddle
  4. gliding

Short Answer

Expert verified

The correct answer is option (a).

The elbow is an example of hinge joint.

Step by step solution

01

Hinge joint

  • The hinge joint is formed of hyaline cartilage, which is lubricated by synovial fluid, which connects two or more bones.
  • In order for hinge joints to work, one plane must be able to bend and extend, and another plane must only move very slightly.
  • A crucial part of the intricate biomechanics of the human body is the hinge joint.
02

Step: 1 Explanation for Correct answer

  • Three bones, the humerus, ulna, and radius, form the elbow's hinge joint.
  • Elbow movement only occurs in one plane because it is a hinge joint.
  • Forearm movement at the elbow joint is a part of elbow joint movements. Thus, the option a is correct.
03

Step: 2 Explanation for incorrect answer

  • The neck's first and second vertebral joints, which permit back-and-forth movement of the head, are an example of a pivot joint. So, option b is wrong.
  • Thumb joints are a good example of saddle joints. So, option c is wrong as well.
  • The wrist joint is an example of a gliding joint. Hence, option d is wrong too.

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Most popular questions from this chapter

The pectoral girdle consists of the:

  1. clavicle and sternum
  2. sternum and scapula
  3. clavicle and scapula
  4. clavicle and coccyx

The movement of bone away from the midline of the body is called ________.

  1. circumduction
  2. extension
  3. adduction
  4. abduction

Describe the joints and motions involved in taking a step forward if a person is initially standing still. Assume the person holds his foot at the same angle throughout the motion.

Which of the following statements about bone tissue is false?

  1. Compact bone tissue is made of cylindrical osteons that are aligned such that they travel the length of the bone.
  2. Haversian canals contain blood vessels only.
  3. Haversian canals contain blood vessels and nerve fibers.
  4. Spongy tissue is found on the interior of the bone, and compact bone tissue is found on the exterior.

Which of the following is not a characteristic of the synovial fluid?

  1. lubrication
  2. shock absorption
  3. regulation of water balance in the joint
  4. protection of articular cartilage
See all solutions

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