Locomotion and Movement is a Class 11 Biology chapter that carries about 2.3% of the Biology questions in NEET. Practise it with 58 questions covering 3 topics, each with an explanation.
Sample questions on Locomotion and Movement with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 1: Muscle Structure and Contraction
According to the sliding filament theory of muscle contraction, the sarcomere shortens because:
- A actin and myosin filaments contract in length
- B actin filaments slide over myosin filaments without either filament changing length
- C myosin filaments dissolve
- D calcium leaves the muscle cell permanently
Answer: B. actin filaments slide over myosin filaments without either filament changing length
Why: The thin actin filaments slide past the thick myosin filaments, pulled by cross-bridge cycling, shortening the sarcomere without the filaments themselves shortening.
Question 2: Skeletal System and Joints
Gout is caused by the accumulation of:
- A calcium in the blood
- B lactic acid in muscles
- C uric acid crystals in the joints
- D cholesterol in arteries
Answer: C. uric acid crystals in the joints
Why: Osteoporosis, in contrast, is a loss of bone mass with age, linked to a fall in oestrogen.
Question 3: Types of Muscles and Sliding Filament Theory
According to the sliding filament theory, muscle contraction occurs due to the sliding of:
- A actin filaments over myosin filaments
- B myosin filaments over actin filaments without any bonding
- C mitochondria within the sarcomere
- D the sarcolemma over the sarcoplasm
Answer: A. actin filaments over myosin filaments
Why: The sliding filament theory explains that muscle contraction occurs when actin (thin) filaments slide over myosin (thick) filaments, shortening the sarcomere.
Question 4: Skeletal System and Joints
Arthritis refers to the:
- A a muscle injury
- B the fracture of a bone
- C inflammation of the joints
- D a blood disorder
Answer: C. inflammation of the joints
Why: It includes the osteoarthritis, rheumatoid arthritis and gout.
Question 5: Types of Muscles and Sliding Filament Theory
The cardiac muscles are:
- A striated and involuntary, and the cells are joined by the intercalated discs
- B non-striated
- C smooth
- D voluntary
Answer: A. striated and involuntary, and the cells are joined by the intercalated discs
Why: They are found in the heart.
Question 6: Skeletal System and Joints
The joint between the atlas and axis vertebrae, which allows the head to rotate, is an example of a:
- A hinge joint
- B pivot joint
- C ball and socket joint
- D gliding joint
Answer: B. pivot joint
Why: The atlas-axis joint is a pivot joint, permitting rotational movement of the head.
Question 7: Types of Muscles and Sliding Filament Theory
The central part of the thick filament, not overlapped by the thin filaments, is called the:
- A I band
- B A band
- C Z line
- D H zone
Answer: D. H zone
Why: It is in the middle of the A band.
Question 8: Skeletal System and Joints
Gout is caused by the:
- A accumulation of uric acid crystals in the joints
- B the autoimmune reaction
- C a bacterial infection
- D the lack of calcium
Answer: A. accumulation of uric acid crystals in the joints
Why: It results in the inflammation of the joints.
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