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Locomotion and Movement — NEET MCQs with answers
Movement is one of the significant features of living beings, ranging from streaming of protoplasm in Amoeba to locomotion. Cells of the human body show three main types of movement — amoeboid (macrophages, leucocytes), ciliary (trachea, female reproductive tract) and muscular. Locomotion requires a perfectly coordinated activity of the muscular, skeletal and neural systems, and muscle contraction is explained by the sliding of thin filaments over thick filaments.
Topics in this chapter
- 17.1 Types of Movement
- 17.2 Muscle
- 17.3 Skeletal System
- 17.4 Joints
- 17.5 Disorders of Muscular and Skeletal System
Free practice questions
Which of the following bones is present in the middle ear?
- A. Patella
- B. Incus
- C. Clavicle
- D. Hyoid
Show answer
Answer: B — Malleus, incus and stapes are the three ear ossicles of the middle ear; the hyoid, patella and clavicle lie elsewhere.
NCERT Class 11 Biology Ch 17.3
Which of the following statements about osteoporosis is INCORRECT?
- A. It is characterised by decreased bone mass
- B. It is an age-related disorder
- C. It is commonly caused by increased levels of estrogen
- D. It increases the chances of fractures
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Answer: C — Osteoporosis is commonly caused by DECREASED estrogen, not increased. The other statements are correct.
NCERT Class 11 Biology Ch 17.5
The coordinated movements of cilia in the trachea help us in:
- A. Removing dust particles and some foreign substances inhaled with air
- B. Producing sound during expiration
- C. Warming inhaled air before it reaches the lungs
- D. Exchanging oxygen and carbon dioxide across the alveoli
Show answer
Answer: A — NCERT states that the coordinated movements of cilia in the trachea help in removing dust particles and some of the foreign substances inhaled along with atmospheric air.
NCERT Class 11 Biology Ch 17.1
Formation of the cross bridge pulls the attached actin filaments towards:
- A. The centre of the 'I' band
- B. The sarcolemma
- C. The M line of the adjacent sarcomere
- D. The centre of the 'A' band
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Answer: D — NCERT: this pulls the attached actin filaments towards the centre of the A band. Correct option: (D) The centre of the 'A' band.
NCERT Class 11 Biology Ch 17.2
Joints have been classified into how many major structural forms?
- A. Three
- B. Four
- C. Five
- D. Two
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Answer: A — NCERT: joints have been classified into three major structural forms — fibrous, cartilaginous and synovial.
NCERT Class 11 Biology Ch 17.4
Which specialised connective tissue has a very hard matrix due to calcium salts in it?
- A. Ligament
- B. Cartilage
- C. Bone
- D. Tendon
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Answer: C — Bone has a very hard matrix due to calcium salts, whereas cartilage has a slightly pliable matrix due to chondroitin salts.
NCERT Class 11 Biology Ch 17.3
Which structure is the site at which an electrical event first appears in the muscle fibre itself, rather than in the neuron?
- A. Troponin on the thin filament
- B. 'M' line of the myofibril
- C. Sarcoplasmic reticulum
- D. Sarcolemma
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Answer: D — The neural signal reaching the neuromuscular junction releases acetyl choline, which generates an action potential IN THE SARCOLEMMA. The sarcolemma, the plasma membrane of the muscle fibre, is thus the first muscle structure to show an electrical change.
NCERT Class 11 Biology Ch 17.2
Arthritis, as defined in NCERT, refers to:
- A. Paralysis of skeletal muscle
- B. Decreased bone mass
- C. Inflammation of joints
- D. Degeneration of skeletal muscle
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Answer: C — NCERT gives arthritis simply as inflammation of joints; no cause is stated for plain arthritis.
NCERT Class 11 Biology Ch 17.5
Which of the following joints would NOT permit even limited movement?
- A. Joint between atlas and axis
- B. Joint between the carpals
- C. Suture between two flat skull bones
- D. Joint between adjacent vertebrae
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Answer: C — Fibrous joints, such as the sutures between flat skull bones, do not allow any movement.
NCERT Class 11 Biology Ch 17.4
According to NCERT, the methods of locomotion performed by animals vary with:
- A. The number of chromosomes they possess
- B. The colour of their integument
- C. Their habitats and the demand of the situation
- D. Their body weight and age alone
Show answer
Answer: C — NCERT states that methods of locomotion performed by animals vary with their habitats and the demand of the situation.
NCERT Class 11 Biology Ch 17.1
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