Tag: our skeletal system and the skin

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Questions Related to our skeletal system and the skin

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

Smallest bone in the body of humans is 

  1. Incus

  2. Stapes

  3. Malleus

  4. Maxilla
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Two fibulas

  2. Two femurs

  3. Two tibias

  4. Two ulnas
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

Haversian canal is present in all of the following except

  1. Diaphysis (compact) bone of rabbit

  2. Epiphysis (spongy bone) of rabbit

  3. Diaphysis (compact) bone of frog

  4. Both (2) & (3)
Reveal answer Fill a bubble to check yourself
D Correct answer
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)'.

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

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.

  1. (i) and (v)

  2. (i) and (ii)

  3. (ii) and (v)

  4. (iii) and (iv)
Reveal answer Fill a bubble to check yourself
D Correct answer
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).

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

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

  1. Sesamoid bone

  2. Odontoid process

  3. Plowshare bone

  4. Synsacrum
Reveal answer Fill a bubble to check yourself
D Correct answer
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

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

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

  1. Jockey

  2. Swimmer

  3. Weight lifter

  4. Golfer
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Patella is a kind of

  1. Cartilage bone

  2. Membrane bone

  3. Cartilage

  4. Sesamoid bone
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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

  1. Bone elongation

  2. Growth of thickness of the bone

  3. Remodelling the shape of bone

  4. Formation of Haversian system
Reveal answer Fill a bubble to check yourself
A Correct answer
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.