Tag: our skeletal system and the skin

Questions Related to our skeletal system and the skin

Which of the following is not a function of skeletal system?

biology our skeletal system and the skin other systems in the body introduction to skeletal system busy at work - our internal organs

  1. Production of eythrocytes

  2. Storage of minerals

  3. Production of body heat

  4. Locomotion

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Correct Option: C
Explanation:

  • The adult human skeletal system consists of 206 bones, as well as a network of tendons, ligaments and cartilage that connects them.
  •  The skeleton serves six major functions: support, movement, protection, production of blood cells, storage of minerals and endocrine regulation. Hence, Production of body heat is not a function of the skeletal system.
 So, the correct answer is 'Production of body heat

The protein content of skeletal muscles is ............ %.

biology our skeletal system and the skin other systems in the body introduction to skeletal system busy at work - our internal organs

  1. 10

  2. 20

  3. 40

  4. 30

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Correct Option: B
Explanation:

Skeletal muscle represents the majority of muscle tissue. It is the type of muscle, that powers movement of the skeleton. Their composition is 75-80 percent water, 15-20 percent proteins, 1 percent glycogen, 1 percent lipids and 1 percent mineral salts.

Water content of skeletal muscles is ............... %.

biology our skeletal system and the skin other systems in the body introduction to skeletal system busy at work - our internal organs

  1. 25

  2. 50

  3. 75

  4. 90

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Correct Option: C
Explanation:

The water and electrolyte content of skeletal muscle was an average of 78.8 gm. of water, 4.96 milliequivalent (meq.) of sodium, 8.32 meq. of potassium, 4.04 meq. of chloride, 0.445 meq. of magnesium, and 3.88 meq. of phosphorus per 100 gm. of wet tissue or muscle. Hence, the percentage of water content in skeletal muscle can vary from 75-78%.

Which one of the following is the correct description of a certain part of a normal human skeleton?

evs - i busy at work - our internal organs other systems in the body introduction to skeletal system our skeletal system and the skin

  1. Parietal bone and the temporal bone and the skull are joined by fibrous joint.

  2. First vertebrae is axis, which articulates with the occipital condyles.

  3. The 9th and 10th pairs of ribs are called the floating ribs.

  4. Glenoid cavity is a depression to which the thigh bone articulates.

Show answer
Correct Option: A
Explanation:

A suture is a type of fibrous joint, which only occurs in the skull. These joints are synarthroses. One parietal bone is located on each side of the skull just behind the frontal bone. The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebrum.

Which of the following is not a function of the skeleton system?

evs - i busy at work - our internal organs other systems in the body introduction to skeletal system our skeletal system and the skin

  1. Production of erythrocytes

  2. Storage of minerals

  3. Production of body heat

  4. Locomotion

Show answer
Correct Option: C
Explanation:

Skeletal system is the articulation bones to give perfect shape to the body. They help in locomotion by attaching with muscles. 

Bones are made up of minerals like Ca++ and po4-. So they act as store house of minerals. 
Bones have bone marrow which contain stem cells. Stem cells are the precursors of blood form cells like RBC, WBC and platelets,
Skeletal system doesn't play any role in production of heat. Heat production is regulated by metabolic processes. 
So the correct option is C.

In man the axial skeleton is made up of

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. 80 bones

  2. 100 bones

  3. 103 bones

  4. 106 bones

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Correct Option: A
Explanation:

It forms the main axis. It consists of skull - 22 bones vertebral column - 33 vertebrae, sternum - 1 and ribs - 24.

Read the following matches 
(i)   Glenoid cavity            - Scapula
(ii)  Bicipital tuberosity     - Humerus
(iii) Styloid process           - Ulna
Which of these is correct?

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. (i) and (ii)

  2. (i) & (iii)

  3. (i) and (iii)

  4. All are correct

Show answer
Correct Option: B
Explanation:

A- The glenoid cavity or glenoid fossa of scapula is a part of the shoulder. It is a shallow, pyriform articular surface, which is located on the lateral angle of the scapula.

B- The rough eminence which is on the anterior inner aspect of the neck of the radius and into which the tendon of the biceps is inserted.
C- The styloid process of the ulna is found at distal end of the forearm, and projects from the medial and back part of the bone.

So, the correct option is 'Option B'. 

Which bones are present in both hands and foot? Name the only movable bone in the skull of man.

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. Tibia - Maxilla

  2. Radius - Lacrimal

  3. Phalanges - Mandible

  4. Phalanges - Maxilla

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Correct Option: C
Explanation:
  • The phalanges are digital bones in the hands and feet of most vertebrates. In primates, the thumbs and big toes have two phalanges while the other digits have three phalanges.
  •  Hence, Phalanges are present in both hands and foot.
  • 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. The mandible is the only movable bone of the skull, not counting the ossicles of the middle ear.
  • Hence, Mandible is the only movable bone in the skull of the man.
  • So, the correct answer is 'Phalanges - Mandible'.

Which of the following is not fully formed in birds?

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. Pectoral girdle

  2. Pelvic girdle

  3. Hind limb

  4. Fore limb

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Correct Option: D
Explanation:

The main characteristic that is associated with birds is their ability to fly. The entire forelimb has been modified to become a wing. The forelimb is not required to support weight but to restrain prey or for locomotion. 

Number of bone is each upper limb is?

biology skeleton, joints and muscles skeleton our skeletal system and the skin skeleton - movement and locomotion

  1. $1, 1, 1$

  2. $8, 5, 14$

  3. $2, 2, 2, 16, 10, 28$

  4. $1, 1, 1, 8, 5, 14$

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Correct Option: A