Tag: bones

Questions Related to bones

Select the correct match.

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

  1. Pivot joint $\rightarrow$ Between third and fourth cervical vertebrae

  2. Hinge joint $\rightarrow$ Between humerus and pectoral girdle

  3. Gliding joint $\rightarrow$ Between carpals

  4. Cartilaginous joint $\rightarrow$ Between frontal and parietal

Show answer
Correct Option: C
Explanation:
  • Joints are points of contact between bones, or between bones and cartilages.
  • Synovial joints are characterized by the presence of a fluid-filled synovial cavity between the articulating surfaces of the two bones. These joints help in locomotion and many other movements. Gliding joint is a type of synovial joint.
  • Gliding joints allow the bones to glide past one another in any direction along the plane of the joint -up and down, left and right, and diagonally.
  • The joint between carpals is gliding joint.
  • So, the correct answer is 'Gliding joint  → Between carpals'.

Polymerization reactions that produce many macromolecules are called _______ reactions.

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

  1. Hydrolytic

  2. Condensation

  3. Carboxylation

  4. Amination

Show answer
Correct Option: B
Explanation:

The condensation reaction is the type of polymerization reaction in which many monomers join together through bonds forming macromolecules of polymers by giving out byproducts majorly water. The example includes polypeptide chains of proteins or the formation of cellulose.

Hence, the correct answer is 'Condensation'.

The joint between carpal and metacarpal of thumb in primate mammals is

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

  1. Pivot joint

  2. Hinge joint

  3. Ball and Socket joint

  4. Saddle joint

Show answer
Correct Option: D
Explanation:

There are six types of synovial joints. These are a pivot, hinge, saddle, plane, condyloid, and ball and socket joints. The pivot joint is a type of synovial joint that allows rotation. The joint between atlas and axis is pivot joint which allows the movement of the head back and forth. The hinge joint is a type of synovial joint which allows movement only in one axis, that is flexion and extension. Knee joint, ankle joint are examples of the hinge joint. Ball and socket joint allows rotation in multiple directions. In this type of joint, ball-shaped surface of one joint lies in the socket-like depression of another joint. The hip joint is an example of ball and socket joint. Saddle joint is the joint present between the carpal and metacarpal of thumb. It allows flexion, extension, adduction, abduction and circumduction movements. It provides stability and flexibility to bones.

Thus, the correct answer is option D.

The opening and closing of a door can be related to which of the following types of joints?

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

  1. Hinge joint

  2. Fixed joint

  3. Ball and socket joint

  4. All of the above

Show answer
Correct Option: A
Explanation:
  • A joint is the part of the body where two or more bones meet to allow movement.
  • Hinge joint- the two bones open and close in one direction only (along one plane) like a door, such as a knee and elbow joints.
  • Hence The opening and closing of a door can be related to Hinge joint.
  • So, the correct answer is 'Hinge joint'.

Lumbar vertebrae are found in:

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. neck region

  2. abdominal region

  3. hip region

  4. thorax

Show answer
Correct Option: A
Explanation:

Lumbar vertebrae are found in the 'abdominal region'.

So the correct answer is 'Neck region'.

The fore arm has two bones.

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. True

  2. False

Show answer
Correct Option: A
Explanation:
The forearm is the region of the upper limb between the elbow and the wrist. The forearm contains two long bones, the radius and the ulna, forming the radioulnar joint. The ulna is the longer and larger of the two bones, residing on the medial side of the forearm. Compared to the ulna, the radius is slightly shorter, thinner, and extends from the lateral side of the elbow. 
So, the answer is true.

The finger bones do not have joints.

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. True

  2. False

Show answer
Correct Option: B
Explanation:
The hand and wrist are made up of many different bones, muscles and ligaments that enable a wide range of movements. Rather than a single joint, each of the fingers has three joints: Metacarpophalangeal joint (MCP)- joint at the base of the finger, Proximal interphalangeal joint (PIP)- joint in the middle of the finger and Distal interphalangeal joint (DIP)- joint closest to the fingertip. Each thumb has two joints.
So, the answer is false.

Read the following statements and find out the incorrect statement.
A. About $45-50\%$ of the body weight of a human adult is contributed by muscles.
B. Muscles have special properties like excitability, contractility, extensibility and elasticity.
C. Based on their location, three types of muscles are identified: skeletal, smooth and cardiac.
D. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activity directly.

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. B & C

  2. A & C

  3. Only A

  4. A & D

Show answer
Correct Option: A
Explanation:
  1. A major bulk of body weight; 45−50% is contributed by muscles.
    2. All muscle cells share four primary properties that distinguish them from other cells : excitability, contractility, extensibility and elasticity.
    3. Based on their location, three types of muscles are identified: skeletal, smooth and cardiac.
    4. Cardiac muscles are striated in appearance and myogenic in nature.
    So, none of the given options are incorrect.

The longest bone in our body is

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. Thigh bone

  2. Fore arm bone

  3. Sternum

  4. Girdle bone

Show answer
Correct Option: A
Explanation:

Femur or thighbone is the longest bone in the body. The head of the femur fits into the hip socket and the bottom end connects to your knee. The two bones beneath the knee that make up your shin are tibia and fibula. The upper and lower leg are connected by a hinge joint.

So, the correct answer is 'Thigh bone'.

The only movable part of the skull is

evs bones skeletal system and muscles assimilation of food components and importance of food

  1. Upper jaw

  2. Lower jaw

  3. Both A & B

  4. None of the above

Show answer
Correct Option: B
Explanation:
  • The mandible or lower jaw, is the only movable part of the skull, forming the temporomandibular joint with the temporal bone.
  • The mandible is the largest, strongest and lowest bone in the human face. It forms the lower jaw and holds the lower teeth in place.
  • So, the correct answer is 'Lower jaw'.