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

Which of these are typical cervical vertebrae?

  1. 1, 2, 7

  2. 5, 6, 7

  3. 1, 2, 3

  4. 4, 5, 6

  5. 3, 4, 5, 6
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation
  • The cervical spine is made up of 7 vertebrae. The first 2, C1 and C2, are highly specialized and are given unique names: atlas and axis, respectively. C3-C7 are more classic vertebrae, having a body, pedicles, laminae, spinous processes, and facet joints.
  • The typical cervical vertebrae are $C3, C4, C5, and C6$. The atypical cervical vertebrae are C1 – Atlas, C2 – Axis, and C7 – vertebra. The key difference between typical and atypical vertebrae is that typical vertebrae consist of all basic components of a vertebra while atypical vertebrae are the vertebrae that have modified structure due to their position and function.
  • Hence 3, 4, 5, 6 are typical cervical vertebrae.
  • So,the correct answer is '3,4,5,6'.
Multiple choice biology our skeletal system and the skin bones and movements joints in the human body joints

Last vertebra of frog is

  1. Paracolic

  2. Amphicoelous

  3. Opisthocoelous

  4. Urostyle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Urostyle is a long bone formed from fused vertebrae at the base of the vertebral column in some lower vertebrates, especially frogs and toads.
  • In frog Eighth vertebra is amphicoelous and the 9th vertebra is biconvex and is attached to urostyle on the posterior side.
  • Hence the Last vertebra of the frog is Urosyyle.
  • So, the correct answer is 'Urostyle'.
Multiple choice biology our skeletal system and the skin bones and movements joints in the human body joints

The major constituent of vertebrate bone is

  1. Sodium chloride

  2. Calcium phosphate

  3. Potassium hydroxide

  4. Calcium carbonate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Bone is the rigid part that constitutes the vertebral skeleton. It is a connective tissue largely composed of organic protein collagen and the inorganic mineral hydroxyapatite.
  • Mineral hydroxyapatite is chemically Calcium phosphate.
  • Hence the major constituent of vertebrate bone is calcium phosphate.
  • So, the correct answer is 'Calcium phosphate'.
Multiple choice biology our skeletal system and the skin bones and movements joints in the human body joints

Consider the following statements.
I. In man, vertebral column has 33 bones organised as 26 bones.
II. The pelvic girdle is made up of three fused bones only.
III. Osteoporosis is characterised by deterioration of the bone due to deficiency of phosphorous.

  1. I alone is correct

  2. II alone is correct

  3. III alone is incorrect

  4. I alone is incorrect

  5. II alone is incorrect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Osteoporosis is a bone disease that occurs when the body loses too much bone, makes too little bone, or both. As a result, bones become weak and may break from a fall or, in serious cases, from sneezing or minor bumps. Osteoporosis means “porous bone.”
  • Osteoporosis can be caused due to deficiency of vitamin D, while osteomalacia is caused by a deficiency in calcium and phosphorus. 
  • Hence Osteoporosis is characterized by deterioration of the bone due to deficiency of phosphorous is an incorrect statement.
  • So, the correct answer is 'III alone is incorrect'.
Multiple choice biology our skeletal system and the skin bones and movements joints in the human body joints

Bifurcated spinous process is present in

  1. All cervical vertebrae

  2. Second and Sixth cervical vertebrae

  3. All thoracic vertebrae

  4. First and seventh cervical vertebrae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The spinous process extends posteriorly, or rearward, from the laminae of the vertebra, and is a point of attachment for several muscles, ligaments, and fasciae. 
  • In cervical vertebrae C2 through C6, there exists a common variation of bifurcation. A spinous process is considered bifurcated when a small 'split' occurs at the distal end.
  • ​The bifurcation allows for the nuchal ligament to fall centrally which allows the cervical musculature to attach jointly to this strong ligament, as well as the spinous process without interference at the bony insertion.
  • Hence the Bifurcated spinous process is present in second and Sixth cervical vertebrae.
  • So, the correct answer is 'Second and Sixth cervical vertebrae'.
Multiple choice biology our skeletal system and the skin bones and movements joints in the human body joints

Pick up the correct match for number of bones.
1. Sternum ------ (i) 14
2. Ribs       ------ (ii) 1
3. Pelvis     ------ (iii) 24
4. Face       ------ (iv) 3

  1. 1- (ii), 2- (iii), 3- (iv), 4- (i)

  2. 1- (ii), 2- (iii), 3- (i), 4- (iv)

  3. 1- (iii), 2- (iv), 3- (ii), 4- (i)

  4. 1- (iii), 2- (ii), 3- (iv), 4- (i)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sternum or breastbone is a flat, narrow and long bone which forms the base for attachment of ribs and is made up of one bone; there are 24 bones or 12 pairs consisting of the rib cage; pelvis consists of 3 bones and face is composed of facial bones which are 14 in number.

Thus, the correct answer is option A.

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

Read the given statements and select the correct option.
Statement 1 : Articulation between the occipital condyles and the atlas vertebra forms a hinge joint.
Statement 2 : It permits the head to move in one plane only, i.e., nodding of head. 

  1. Both statements 1 and 2 are correct

  2. Statement 1 is correct but statement 2 is incorrect

  3. Statement 1 is incorrect but statement 2 is correct

  4. Both statements 1 and 2 are incorrect
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Articulation between the occipital condyles and the atlas vertebra forms a hinge joint, it permits the head movement in one plane.

So, the correct option is 'Both statements 1 and 2 are correct'.

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

Which of the following joints is formed between atlas and axis vertebrae?

  1. Saddle joint

  2. Fibrous joint

  3. Cartilaginous joint

  4. Pivot joint
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Pivot joint is present between atlas and axis vertebrae. there is a pivot articulation between the odontoid process of the axis and the ring formed by the anterior arch and the transverse ligament of the atlas.
So, the correct option is 'Pivot joint' 
Multiple choice evs bones joints in the human body our skeletal system and the skin joints

The joint of femur with pelvic girdle is:

  1. hinge joint

  2. non-movable joint

  3. pivot joint

  4. ball and socket joint
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The joint of the femur with pelvic girdle is a synovial - ball and socket joint. Where the ball like projection of the femur fits into the cup like acetabulum of the pelvic bone, with the movement being 360$^0$ and the gap between the joint filled by synovial fluid.

So, the correct answer is 'ball and socket joint'