Question:

Which one of the following is the correct description of a certain part of a normal human skeleton?

Updated On: May 17, 2024
  • parietal bone and the temporal bone of the skull are joined fibrous joint
  • first vertebra is axis which articulates with the occipital condyles
  • the 9th and 10th pairs of ribs are called the floating ribs
  • glenoid cavity is a depression to which the thigh bone articulates
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The Correct Option is A

Solution and Explanation

The bones of skulls are joined by white fibrous tissue which sustain no movement between the skull bones. This kind of joint is classified as fibrous or immovable joints. Thus, parietal and temporal bone of the skull are joined by fibrous joints. First cervical vertebra, atlas, joins the second cervical vertebra axis to form a joint (pivot joint) which allows movement in one plane. The atlas supports the head and allows movement of head over neck. The last two pairs of ribs are called floating ribs because their anterior ends are not attached to either the sternum or the cartilage of anterior rib. Glenoid cavity is a depression to which humerus articulates.
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Concepts Used:

Locomotion and Movement

Locomotion

The movement of a creature from one place to another is known as locomotion. During the process, there is the action of appendages such as wings, limbs, and flagella. In some animals, like fish, whales, and sharks, locomotion upshots from a wave-like series of muscle contractions. Locomotion helps an organism in finding their food, avoid harsh weather conditions, escape from their predators, etc.

Some examples of locomotion are walking, running, swimming, etc. Movement, on the other hand, refers to any type of motion that need not be localized.

Read More: Locomotion and Movement

Movement 

Movement is generally described as a state of changing the position from rest to motion or vice-versa. Movement can be both voluntary movement and involuntary movement. Movement helps an organism perform essential functions, such as pumping blood to the different parts of the body, etc.

Read More: Difference between Locomotion and Movement