Free Support and Movement MCQs with Answers
738 Support and Movement MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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Read the Support and Movement notesFree MDCAT chapter notes with key terms738 questions · page 18 of 37
- A. Cork cambium
- B. Vascular cambium
- C. Pith
- D. Both Options A and B are correct
Explanation: Option D is correct since both types of cambiums are responsible for secondary growth in the vascular bundle and that in turn causes an…
Correct answer: Both Options A and B are correct- A. Myofibril
- B. Cross bridges
- C. Z band
- D. Sarcomere
Explanation: Option D is correct it is also a PTB fact. Sarcomere is a region of myofibril btw two successive Z-line and is the smallest contractile…
Correct answer: Sarcomere- A. Syndesmosis
- B. Sutures
- C. Gomphosis
- D. None of these
Explanation: A gomphosis is the specialised fibrous joint that anchors the root of a tooth into its bony socket within the maxillary bone (upper jaw)…
Correct answer: Gomphosis- A. Endosymbiotic theory
- B. Central Dogma theory
- C. Cross-bridge theory
- D. Sliding filament theory
Explanation: The sliding filament theory is the explanation for how muscles contract to produce force.
Correct answer: Sliding filament theory- A. Condyloid joint is triaxial
- B. Synovial fluid reduces friction
- C. Coronal suture is for parietal and frontal bone articulation
- D. Synostosis is a bony joint
Explanation: Condyloid joints, also known as ellipsoid joints, are composed of an egg-shaped bone known as a condyle that fits into a similarly shaped…
Correct answer: Condyloid joint is triaxial- A. Tropomyosin
- B. Troponin
- C. Both a and b
- D. None of these
Explanation: Option A is correct because "tropomyosin" constantly covers the myosin binding sites on actin until "troponin" receives Calcium ions for…
Correct answer: Tropomyosin- A. There are many blood vessels in the cartilage
- B. It is a form of connective tissue
- C. It covers ends of the bone at the joint
- D. Both A and B
Explanation: Option A is correct as "cartilage" is the main type of connective tissue found throughout the body in bones, joints, spine, lungs and…
Correct answer: There are many blood vessels in the cartilage- A. Articular capsule
- B. Articular cartilage
- C. Synovial fluid
- D. Fibrocartilage
Explanation: Option D is correct as "fibrocartilage" is found in the intervertebral discs as well as some synovial joints.
Correct answer: Fibrocartilage- A. 3
- B. 6
- C. 7
- D. 2
Explanation: Myosin forms thick filaments (16 nm in diameter) and actin forms thinner filaments (7-8 nm in diameter).
Correct answer: 2- A. Motor unit
- B. Neuromuscular junction
- C. Neural unit
- D. Microtubules
Explanation: A motor neuron and all of the skeletal muscle cells it stimulates is called a motor unit.
Correct answer: Motor unit- A. Radio-ulnar joints
- B. Tibiofibular joints
- C. Gomphosis
- D. Periodontal ligament
Explanation: The periodontal ligament, commonly known as the PDL, is a soft connective tissue between the inner wall of the alveolar socket and the…
Correct answer: Periodontal ligament- A. Titin
- B. Myosin
- C. Actin
- D. All of these
Explanation: Option D is correct since the force-tension curve/ length-tension curve describes the maximum isometric force, a muscle generates, as…
Correct answer: All of these- A. Actin
- B. Myosin
- C. Troponin
- D. Tropomyosin
Explanation: Option B is correct since the myosin head binds to the ATP and adopts a high energy configuration to bind to the myosin-binding site on…
Correct answer: Myosin- A. Fibrous joints
- B. Cartilaginous joints
- C. Sinovial joints
- D. None of these
Explanation: Option A is correct since fibrous joints are connected by dense, tough connective tissue that is rich in collagen fibers.Option B is…
Correct answer: Fibrous joints- A. H zone and myosin
- B. H zone and actin
- C. I band and A band
- D. H zone and I band
Explanation: The H zone and I band are two regions of the sarcomere, which is the basic unit of muscle contraction.
Correct answer: H zone and I band- A. Saddle joint.
- B. Condyloid joint.
- C. Ball and socket joint.
- D. None of these.
Explanation: An ellipsoidal joint is also known as a condyloid joint. This type of joint is a synovial joint that allows for movement in two planes…
Correct answer: Condyloid joint.357. What is a sarcomere?
- A. The fibers that make up skeletal muscles
- B. The smallest unit of a smooth muscle
- C. A myosin fibril
- D. The contractile unit of a muscle cell
Explanation: A sarcomere is the basic contractile unit of muscle fiber. Each sarcomere is composed of two main protein filaments-actin and myosin-which…
Correct answer: The contractile unit of a muscle cell- A. Cytoplasm of other cell
- B. Nucleoplasm
- C. Mitochondria
- D. Cell membrane
Explanation: Sarcoplasm is the cytoplasm of a muscle fibre. It is a water solution containing ATP and phosphagens, as well as the enzymes and…
Correct answer: Cytoplasm of other cell- A. Nerve impulse
- B. Energy
- C. Calcium
- D. All of these
Explanation: Nerve impulse reaches the neuro-muscular junction and calcium is released in the muscle cell, and when contraction occurs and ATP is used…
Correct answer: All of these- A. Controls the tonic state of myocytes
- B. Creates an ion potential across the muscle surface
- C. Allows attachment sites for communication hormones
- D. Controls the iron levels of cardiac tissue
Explanation: Sarcolemma is not present in cardiac tissue.
Correct answer: Controls the iron levels of cardiac tissue