Tag: our skeletal system and the skin

Questions Related to our skeletal system and the skin

Which one of the following is enclosing the tympanum in
mammals

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

  1. Tympanic membrane

  2. Tympanic bulla

  3. Mastoid

  4. Periotic and tympanic bulla

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Correct Option: B
Explanation:

Tympanic bone is a hollow, flask shaped bone. Its main swollen part called tympanic bulla.

Sella turcica is found in which bone

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

  1. Alesphenoid

  2. Parietal

  3. Frontal

  4. Basi-sphenoid

Show answer
Correct Option: D
Explanation:

Sella turcica or the Turkish saddle' is a depression in the floor of the mammalian skull in the sphenoid (Basi sphenoid) bone in which the pituitary body is lodged.

What is the difference between the bone of rabbit and that
of frog

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

  1. In the bone of rabbit haversian canal is foun

  2. Yellow marrow is found

  3. Osteocytes are of different types

  4. Bone of frog is spongy

Show answer
Correct Option: A
Explanation:

Within the matrix of the compact bone of the shaft of long mammalian bones. (like humerus, femur, tibia), a network of branching canals (called haversian canals) is present in which lie the blood vessels.

In birds, some of the vertebrae are fused to form

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

  1. Keel

  2. Synsacrum

  3. Syncytium

  4. Furcula

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Correct Option: B
Explanation:

Synsacrum is a composite bone in birds which consists of about 16 fused vertebrae of different regions.

Deltoid ridge is found in which one of the following bones

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

  1. Radius

  2. Tibia

  3. Femur

  4. Humerus

Show answer
Correct Option: D
Explanation:

Humerus is differentiated into three parts head, shaft and lower end. Shaft has a V-shaped deltoid ridge, at its middle.

Extremities of long bones possess 

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

  1. Calcified cartilage

  2. Fibrous cartilage

  3. Elastic cartilage

  4. Hyaline cartilage

Show answer
Correct Option: D
Explanation:
  • Long bones are hard, dense bones that provide strength, structure, and mobility. For example, The thigh bone (femur) is a long bone.
  • Articular cartilage is hyaline cartilage that is found on the articular surfaces of bone i.e where bones meet and form joints.
  • Hence  Extremities of long bones possess Hyaline cartilage(articular cartilage).
  • So, the correct answer is 'Hyaline cartilage'.

Long bones function in

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

  1. Support

  2. Support, erythrocyte and leucocyte synthesis

  3. Support and erythrocyte synthesis

  4. Erythrocyte formation

Show answer
Correct Option: B
Explanation:
  • Long bones are hard, dense bones that provide strength, structure, and mobility, typically found in the upper and lower extremities (arms and legs). For example, the femur (thigh bone) is a good example of a long bone.
  • Haemopoiesis(production of blood cells) takes place in epiphyses of long bones.
  • As long bones are hard and dense they provide support and they function as the synthesis of erythrocyte and leucocyte due to the presence of red bone marrow.
  • So, the correct answer is 'Support, erythrocyte, and leucocyte synthesis',.

Human skeleton has $206$ bones.

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

  1. True

  2. False

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Correct Option: A
Explanation:

Human skeleton is divided into two types based on the planes the bones are present. They are Axial skeleton present in the central plane and Appendicular skeleton i.e., bones present in appendages. The appendicular skeleton of 126 bones and the axial skeleton of 80 bones together form the complete skeleton of 206 bones in the human body. So, the given statement is true.

Yellow bone marrow occurs in medullar cavity of

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

  1. Short bones

  2. Spongy bones

  3. Long bones

  4. All the above

Show answer
Correct Option: C
Explanation:
  • The central cavity of long bone shafts where red bone marrow and/or yellow bone marrow(adipose tissue) is stored is called the medullary cavity.
  • Hence yellow bone marrow occurs in the medullary cavity of long bones.
  • The amount of yellow bone marrow increases with age.
  • So, the correct answer is 'Long bones'.

Human skeleton altogether contains 206 bones. Some bones are fused in adults, an example of fused bones would be   

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

  1. Coccyx

  2. Ear ossicles

  3. Carpals

  4. Metacarpals

Show answer
Correct Option: A
Explanation:
  • The coccyx, commonly referred to as the tailbone, is the final segment of the vertebral column in all apes, and analogous structures in certain other mammals.
  •  Depending on an individual's development, the coccyx may consist of three to five different bones connected by fused or semi-fused joints and/or disc-like ligaments.
  •  The individual bones also fuse together to form a single coccyx throughout adulthood. Hence, Human skeleton altogether contains 206 bones. Some bones are fused in adults, an example of fused bones would be  Coccyx.
    • So, the correct answer is 'Coccyx'.