Tag: our skeletal system and the skin

Questions Related to our skeletal system and the skin

Smallest bone in the body of humans is 

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Incus

  2. Stapes

  3. Malleus

  4. Maxilla

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Correct Option: B
Explanation:

Stapes is the third bone of ear ossicles in the middle ear. It is the smallest bone measuring 3*2.5mm roughly. 

Incus and malleus are the other two ear ossicles in middle ear larger than stapes.
The maxilla is the bone that holds the upper teeth. It is bigger than Stapes.
So the correct option is B.

The parietal bone is an example of which of the following types of bones

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Short

  2. Long

  3. Flat

  4. Irregular

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Correct Option: C
Explanation:

There are flat bones in the skull, the thoracic cage, and the pelvis. The function of flat bones is to protect internal organs such as the brain, heart, and pelvic organs.

So, the correct option is 'flat'.

Which of the following bones are the longest in the body?

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Two fibulas

  2. Two femurs

  3. Two tibias

  4. Two ulnas

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Correct Option: B
Explanation:

The head of the femur articulates with the acetabulum in the pelvic bone forming the hip joint, while the tibia and kneecap forming the knee joint. By most measures, the femur is the strongest bone in the body. The femur is also the longest bone in the human body.

So, the correct option is 'Two femurs'.

Ends of long bones are covered with

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. blood cells

  2. muscles

  3. cartilages

  4. ligaments

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Correct Option: C
Explanation:

Ends of long bones are covered with a layer of connective tissue called hyaline cartilage. So, the correct answer is (c).

Haversian canal is present in all of the following except

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Diaphysis (compact) bone of rabbit

  2. Epiphysis (spongy bone) of rabbit

  3. Diaphysis (compact) bone of frog

  4. Both (2) & (3)

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Correct Option: D
Explanation:

Haversian Canals are the features of the compact long bones of mammals. These are centrally located and supply nerves and blood vessels to the osteocytes of bones. The Epiphysis of rabbit and diaphysis of frog do not show the Haversian Canals.

Hence, the correct answer is 'Both (2) and (3)'.

Which of the following statements are incorrect regarding a normal human?
(i) The skull is dicondylic.
(ii) Metacarpals are five in numbers.
(iii) Patella is a cup-shaped bone covering the knee dorsally.
(iv) Scapula is a large triangular flat bale, situated on the ventral side of the thorax.
(v) The pelvic girdle has two coxal bones.

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. (i) and (v)

  2. (i) and (ii)

  3. (ii) and (v)

  4. (iii) and (iv)

Show answer
Correct Option: D
Explanation:

Following statements are incorrect regarding a normal human: 

(i) Patella is a cup-shaped bone covering the knee dorsally.
(ii) Scapula is a large triangular flat bone, situated on the ventral side of the thorax.
So, the correct answer (d).

In birds, 6-10 caudal vertebrae are usually fused to form

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Sesamoid bone

  2. Odontoid process

  3. Plowshare bone

  4. Synsacrum

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Correct Option: D
Explanation:

The body of the bird is adapted for flight. One of the key adaptions for this is the fusing of bones into single ossification.The compound structure present in the birds vertebral column is called the synsacrum and is formed by the fusion of 14 to 16 vertebrae. The last part of the synsacrum is formed by the fusion of the caudal vertebrae

Which of the following is likely to have the strongest leg bone?

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Jockey

  2. Swimmer

  3. Weight lifter

  4. Golfer

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Correct Option: C
Explanation:

The femur, or thigh bone, is the longest, heaviest and strongest bone in the entire human body and helps support all the body's weight. The weight lifter will therefore have the strongest leg bones.

Therefore, the correct answer is option C.

Patella is a kind of

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Cartilage bone

  2. Membrane bone

  3. Cartilage

  4. Sesamoid bone

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Correct Option: D
Explanation:

A bone which is embedded in the tendon is known as sesamoid bone. Patella is a the largest sesamoid bone which articulates with the femur (thigh bone) and covers and protects the anterior articular surface of the knee joint. 

So, the correct answer is 'Sesamoid bone'.

Epiphyseal disks, which are present at the ends of the long bones are responsible for

biology our skeletal system and the skin bones and movements joints in the human body joints

  1. Bone elongation

  2. Growth of thickness of the bone

  3. Remodelling the shape of bone

  4. Formation of Haversian system

Show answer
Correct Option: A
Explanation:

At the ends of each long bone are present epiphyses which are covered with hyaline cartilage. The longitudinal growth of long bones is due to the endochondral ossification of the epiphyseal plate and is stimulated by the production of the growth hormone.
Therefore, the correct answer is option A.