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Locomotion and Movement (Class - XI)

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Cells of the human body do not show which of the following types of movement?

  1. Amoeboid

  2. Ciliary

  3. Flagellar

  4. Muscular

  5. None of these


Correct Option: E
Explanation:

Yes, it is the correct answer. All the above movements can be seen in the cells of the human body.

The two systems that work in coordination and bring about movement and locomotion are

  1. respiratoy and skeletal systems

  2. circulatory and muscular systems

  3. skeletal and muscular systems

  4. nervous and muscular systems

  5. skeletal and nervous systems


Correct Option: C
Explanation:

Yes, it is correct. The two systems that bring about movement and locomotion of the body are the skeletal and muscular systems.

Which of the following organisms moves with the help of bones and muscles?

  1. Jellyfish

  2. Earthworm

  3. Hydra

  4. Leech

  5. None of these


Correct Option: E
Explanation:

Yes, all the above given organisms have muscular system, but no skeletal system.

Which of the following cells in a multicellular organism move(s) through the tissues by amoeboid movements to reach the places of infection?

  1. RBC

  2. WBC

  3. Thrombocytes

  4. Adipose cells

  5. Secretory cells


Correct Option: B
Explanation:

Yes, it is correct. Some of the white blood cells, which are phagocytic in nature, move through the tissues by amoeboid movements to reach the places of infection.

Various movements like looping, somersaulting, climbing, shortening and elongation can be seen in

  1. starfishes

  2. hydra

  3. leeches

  4. human beings

  5. None of these


Correct Option: B
Explanation:

Yes, this is correct. Hydra shows all the given types of movements.

Which of the following statements is/are false regarding the skeletal system?

  1. It provides protection to delicate organs like brain, spinal cord and lungs.

  2. The bone marrow serves as the centre for the production of calcium and phosphate.

  3. The movements of the ribs and sternum help with breathing.

  4. In the ear, the sound vibrations are conveyed by a set of three bones as in man.

  5. All of the above


Correct Option: B
Explanation:

Yes, it is the correct answer. The function of bone marrow is stated incorrectly. 

If a person faces his face upward or forward, which muscle is he using?

  1. Pronator

  2. Supinator

  3. Extensor

  4. Flexor

  5. None of these


Correct Option: B
Explanation:

Yes, it is correct. Supinator muscle  rotates the forearm.

In between fixed joints, where bones are held firmly,

  1. white fibrous tissue is present

  2. disc of white fibrocartilage is present

  3. synovial fluid is present

  4. RBCs and WBCs are present

  5. None of these


Correct Option: A
Explanation:

Yes, it is correct. At fixed joints, the bones are held firmly together and movements are not allowed in between them. At these joints, dense and tough inextensible white fibrous tissue is present.

Which of the following joints is immovable?

  1. Ball and socket joint

  2. Ellipsoid joint

  3. Pivot joint

  4. Cartilaginous joint

  5. None of these


Correct Option: E
Explanation:

Yes, it is correct. All the above given joints are either slightly movable or freely movable.

When pain is caused, there is an environmental change in the excitable tissue. This change is called stimulus. This stimulus can be

  1. electrical

  2. thermal

  3. chemical

  4. mechanical

  5. All of the above


Correct Option: E
Explanation:

Yes, this is the correct answer. The stimulus to the nerve supplying the muscle can be thermal, electrical, mechanical or chemical in nature.

Which of the following statements regarding muscle fatigue is false?

  1. After heavy strain of muscular work, one feels fatigue.

  2. Muscle contracts and remains in that state.

  3. Deficiency of oxygen takes place.

  4. Accumulation of lactic acid takes place.

  5. Immediate source of energy ATP decreases.


Correct Option: B
Explanation:

Yes, it is correct. This statement is false as during muscular fatigue, there is an inability of muscular contraction, but when we allow resting for some time, the fatigue is removed and the muscle can contract again.

Match the following:

1 Earthworm a Water vascular system
2 Starfish b Contractile cells
3 Lion c Muscle fibres
4 Hydra d Skeletal muscle
  1. 1 - c, 2 - a, 3 - d, 4 - b

  2. 1 - a, 2 - c, 3 - d, 4 - b

  3. 1 - b, 2 - a, 3 - d, 4 - c

  4. 1 - c, 2 - d, 3 - a, 4 - b

  5. None of these


Correct Option: A
Explanation:

Yes, it is correct. All are matched correctly. 

The number of bones in the human skull or cranium is

  1. 14

  2. 30

  3. 24

  4. 8

  5. None of these


Correct Option: D
Explanation:

The number of bones in a human skull or cranium is 8.

Which of the following joints do(es) not have bones fitted like the hinge of a door?

  1. Elbow joint

  2. Phalanges of toes

  3. Wrist bones

  4. Knee joint

  5. None of these


Correct Option: C
Explanation:

Yes, it is correct. Wrist bones can glide over forearm bones. This is a biaxial joint, the articulating bones of which can glide one above the other.

The muscle which moves a part of the body away from the midline of the body is termed as

  1. extensor muscle

  2. abductor muscle

  3. adductor muscle

  4. pronator muscle

  5. None of these


Correct Option: B
Explanation:

Yes, it is correct. Abductor muscle moves a part of the body away from the midline of the body.

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