Tag: bones and movements

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Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Which one of the following is the correct matching of three items and their grouping category?

  1. Actin, myosin, rhodopsin : Muscle proteins

  2. Cytosine, uracil, thiamine : Pyrimidines

  3. Malleus, incus, cochlea : Ear ossicles

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Actin and myosin are muscle proteins, while rhodopsin is a photoreceptor protein. 

Cytosine, uracil, and thiamine are pyrimidines, that along with purines make up the genetic material. 
Malleus, incus, and stapes together form the ear ossicles. 

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Cervical vertebrate differ from other vertebra in having.

  1. Spinous process

  2. Centrum

  3. Transverse process

  4. Transverse foramen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Spinous process is a bony projection off the posterior (back) of each vertebra. It provides the point of attachment for muscles and ligaments of the spine.

Each vertebra consists of a ventral body, or centrum, surmounted by a Y-shaped neural arch. Together the centrum and neural arch surround an opening, the vertebral foramen, through which the spinal cord passes.

Transverse process is a small bony projection off the right and left side of each vertebrae. They function as the site of attachment for muscles and ligaments of the spine as well as the point of articulation of the ribs (in the thoracic spine). 

The cervical spine is much more mobile than the thoracic or lumbar regions of the spine. Unlike the other parts of the spine, the cervical spine has transverse foramina in each vertebra for the vertebral arteries that supply blood to the brain. Thus, option D is correct.
Multiple choice zoology our skeletal system and the skin bones and movements human skeleton system movement and locomotion in man joints in the human body joints

Total number of vertebra in man is

  1. 30

  2. 33

  3. 40

  4. 35
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The vertebral column in adult man comprises of 26 bones- 

Cervical vertebrae (7), Thoracic vertebrae (12), Lumbar vertebrae(5), Sacrum (5 fused bones), Coccyx (3 to 5 fused bones). 
In a child, there are 33 separate vertebrae, the 9 in the sacrum and coccyx not yet being fused.

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Ilium is the part of

  1. Small intestine

  2. Pectoral girdle

  3. Pulmonary tract

  4. Pelvic girdle
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones ilium, ischium and pubis. At the point of fusion of the above bones is a cavity, called as acetabulum to which the thigh bone articulates. The two halves of the pelvic girdle meet ventrally to form the pubic symphysis containing fibrous cartilage.

Multiple choice zoology our skeletal system and the skin bones and movements human skeleton system movement and locomotion in man joints in the human body joints

Cervical vertebrae are characterized by the presence of

  1. Long neural spine

  2. Odontoid process

  3. Vertebral-arterial-canals

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

There are 7 cervical vertebrae. All cervical vertebrae have apertures in their transverse processes, known as Foramina transversalis, which form vertebro-arterial-canals on either side for vertebral artery to pass through to supply brain and spinal cord.

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Obturator foramen is found in

  1. Frog's pelvic girdle

  2. Frog's pectoral girdle

  3. Rabbit's pelvic girdle

  4. Rabbit's pectoral girdle
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Looking to the bone, it reveals that the surface is not smooth but scarred with bumps, holes and ridges. These are surface markings, where muscles, tendons and ligaments attached, blood and lymph vessels and nerves pass. Some of the important depression and openings are 
(1) Fissure- narrow, cleft-like opening between adjacent parts of the bone. Example: Superior orbital fissure.
(2) Foramen- a bigger, round opening. Example: Foramen magnum in the skull. Obturator foramen is a large oval or irregularly triangular aperture in the hip bone (pelvic girdle of mammals), the margins of which are formed by the pubis and the ischium.
(3) Meatus- a relatively narrow tubular canal. Example: External auditory meatus.
(4) Groves and sulcus- are deep furrow on the surface of a bone or other structure. Example: Inter-vertebral and radial grooves of the humerus.
(5) Fossa- shallow depressed area. Example: Mandibular fossa.

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Ilium of pelvic girdle is articulated with sacrum for

  1. Bending

  2. Jumping

  3. Support

  4. Running
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The largest part of the coaxal bone of pelvic girdle is ilium that connects at the posterior side with the sacrum at a sacroiliac joint. This articulation serves to support the upper body by sequestering the weight to lower extremes of the body. The correct answer is C.
Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.

  1. Malleus and stapes $\rightarrow$ Ear ossicles
  2. Sternum and ribs $\rightarrow$ Axial Skeleton
  3. Clavicle and glenoid cavity $\rightarrow$ Pelvic girdle
  4. Humerus and ulna $\rightarrow$ Appendicuar skeleton
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ear ossicles are made up of three bones called as malleus, incus, and stapes. They vibrate to conduct the sound waves from the outer ear to inner ear and then to the brain. There are two forms of the skeleton. The axial skeleton includes all the bones along the body axis (lengthwise). Sternum and ribs are a part of the axial skeleton. The appendicular skeleton includes all the bones that form the upper and lower limbs, and the shoulder and pelvic girdles. Clavicle and scapula are the parts of the pectoral girdle.

So, the correct answer is option C. 

Multiple choice zoology movement and locomotion in man bones and movements our skeletal system and the skin human skeleton system

Which is the part of pectoral girdle?

  1. Glenoid cavity

  2. Sternum

  3. Ilium

  4. Acetabulum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The glenoid cavity is a part of the shoulder girdle or pectoral girdle. It is a shallow pyriform, articular surface, which is located on the lateral angle of the scapula. The sternum, commonly known as the breastbone, is a long, narrow flat bone that serves as the keystone of the rib cage and stabilizes the thoracic skeleton. The ilium is the uppermost and largest bone of the pelvis and appears in most vertebrates including mammals and birds, but not bony fish. The acetabulum is the socket of the hipbone, into which the head of the femur fits. Thus, option A is correct.