Which measure helps to reduce the risk of osteoporosis?
Correct answer C. Adequate calcium and vitamin D intake with weight-bearing exercise
Topic / 45 questions
Support and Movement MCQs
Support and Movement MCQs are multiple-choice questions on the human skeleton and muscles, covering bone and cartilage, the three types of muscle, the sliding filament mechanism of contraction, joints and disorders such as arthritis. Every question on MCQs360 shows the correct answer instantly so you can check yourself as you revise.
- Biological Molecules 74
- Coordination and Control 72
- Biology Diagnostic 70
- Cell Structure and Function 67
- Biotechnology 65
- Reproduction 58
- Bioenergetics 55
- Circulation 50
- Inheritance 48
- Digestion 45
- Immunity 45
- Support and Movement 45
- Acellular Life (Viruses) 45
- Homeostasis 45
- Respiration and Gaseous Exchange 45
- Evolution 45
- Enzymes 45
- Cell Cycle 41
- Chromosome and DNA 40
- Biology Introduction 38
- Ecosystem 27
Osteoporosis is characterised by ____.
Correct answer D. reduced bone mass making bones porous and fragile
Gout is a form of arthritis caused by deposition of crystals of ____ in joints.
Correct answer B. sodium urate (uric acid)
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Rheumatoid arthritis differs from osteoarthritis in that it is ____.
Correct answer A. an autoimmune disease in which the synovial membrane becomes inflamed
Arthritis is best defined as ____.
Correct answer D. inflammation of one or more joints
Thin filaments of a sarcomere are anchored at the ____.
Correct answer C. Z line
The light I band of skeletal muscle contains ____.
Correct answer D. only thin actin filaments
In a relaxed muscle, which protein covers the myosin-binding sites on actin?
Correct answer D. Tropomyosin
Each thin filament of skeletal muscle is composed mainly of ____.
Correct answer B. two twisted chains of actin with tropomyosin and troponin
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During contraction of a sarcomere, which band or zone does NOT change in length?
Correct answer B. A band
What is the immediate role of ATP binding to the myosin head during the cross-bridge cycle?
Correct answer B. It causes the myosin head to detach from actin
Where on the contractile filaments is ATPase activity located?
Correct answer B. In the heads of myosin molecules
Which neurotransmitter is released at the neuromuscular junction to stimulate skeletal muscle?
Correct answer B. Acetylcholine
Rigor mortis, the stiffening of muscles after death, develops because ____.
Correct answer B. no ATP is available to detach myosin heads from actin
Which compound in muscle rapidly regenerates ATP from ADP during the first few seconds of intense exercise?
Correct answer B. Creatine phosphate
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A single motor neurone together with all the muscle fibres it supplies is called ____.
Correct answer C. a motor unit
A sustained, smooth contraction produced when stimuli arrive so rapidly that the muscle cannot relax between them is ____.
Correct answer C. tetanus
Fibrous bands of dense connective tissue that join bone to bone at a joint are ____.
Correct answer C. ligaments
The fluid that lubricates freely movable joints is secreted by the ____.
Correct answer B. synovial membrane
The joint between the atlas and the axis vertebrae, which allows rotation of the head, is a ____.
Correct answer B. pivot joint
About Support and Movement MCQs
The skeleton section covers the axial and appendicular skeleton, the structure of compact bone with its Haversian systems, bone cells such as osteoblasts and osteoclasts, red marrow and the types of cartilage. Questions compare bone with cartilage and ask where hyaline, elastic and fibrocartilage are found. The muscle section compares skeletal, smooth and cardiac muscle, then examines the ultrastructure of skeletal muscle: myofibrils, sarcomeres, actin and myosin filaments, and the bands seen under a microscope. Further questions test the role of calcium and ATP in the cross-bridge cycle, tetanus and fatigue, the classification of joints and arthritis types, including osteoarthritis, rheumatoid arthritis and gout.
Key facts to remember
- The adult human skeleton has 206 bones: 80 in the axial skeleton and 126 in the appendicular skeleton.
- Osteoblasts build new bone matrix, while osteoclasts break bone down and release calcium.
- The sarcomere, the unit of contraction in skeletal muscle, runs from one Z line to the next.
- During contraction, actin filaments slide over myosin filaments, so the H zone and I band shorten while the A band stays the same length.
- Cardiac muscle is striated, branched and uninucleate, and its cells are joined by intercalated discs.
- Gout is caused by deposition of uric acid crystals in the joints.
Exams that include Support and Movement MCQs
Pakistan
- MDCAT
- NUMS
- AKU
- FSc boards
India
- NEET
Bangladesh
- HSC
- Medical Admission Test
How to prepare for Support and Movement MCQs
- Draw and label a sarcomere in relaxed and contracted states to see which bands change length.
- Make a three-column table comparing skeletal, smooth and cardiac muscle by shape, nuclei, striations and control.
- Learn the sequence of events in the cross-bridge cycle, including where calcium and ATP act.
- Group arthritis types by cause: wear and tear, autoimmune or crystal deposition.
Frequently asked questions
Which exams ask Support and Movement MCQs?
In Pakistan, Support and Movement questions appear in MDCAT, the NUMS and AKU entry tests and FSc board papers. Students in India meet the same content in NEET, and in Bangladesh it is tested in HSC Biology and the Medical Admission Test.
What is the role of calcium in muscle contraction?
When a nerve impulse reaches a muscle fibre, calcium ions are released from the sarcoplasmic reticulum. They bind to troponin, which moves tropomyosin away from the binding sites on actin, allowing myosin heads to attach and form cross-bridges.
How is osteoarthritis different from rheumatoid arthritis?
Osteoarthritis is a degenerative condition in which the articular cartilage of joints wears away, usually with age. Rheumatoid arthritis is an autoimmune disease in which the immune system attacks the synovial membrane, causing inflammation that can affect many joints.
Last reviewed October 2026