FREE NEET Biology Practice MCQ Test: Locomotion And Movement Exercise 1 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Answer: (c)

Pivot joint is a type of synovial joint which provide free movement between atlas and axis vertebrae of vertebral column.

Answer: (d)

Answer: (b)

Answer: (b)

Hinge joint is a form of diarthrosis (freely movable joint) that allows angular movement in one plane only, increasing or decreasing the angle between the bones. Examples are - knee joint and elbow joint.

Answer: (d)

Answer: (b)

Mandible is a large bone constituting the lower jaw.

Answer: (d)

Answer: (a)

The thick and thin filaments do not change length during muscle contraction.

Answer: (a)

Answer: (d)

Thoracic vertebrae are 12 in number, present in the chest.

Answer: (b)

Answer: (d)

Answer: (b)

Glenoid cavity is a shallow concavity on the lateral side of pectoral girdle in which the head of humerus fits making the shoulder joint.

Answer: (d)

Answer: (c)

Answer: (c)

Cardiac muscle fibres are supplied with both central and autonomic nervous system and are not under the control of the will of the animal, i.e., they are involuntary. These muscles possess striations but they never get fatigued as the myofibrils of heart have transverse faint dark and light bands which alternate with each other giving them striped appearance.

Answer: (b)

Answer: (a)

Muscular dystrophy is a group of muscle diseases, marked by weakness and wasting of skeletal muscles, in which there is a recognizable pattern of inheritance. In this disorder, the mutated gene on middle of the short arm of X-chromosome is unable to produce a protein dystrophin in skeletal muscles. It is common in males, female heterozygous carriers are normal.

Answer: (c)

Sliding filament theory was given by Huxley and Huxley(1954). It states that actin and myosin filaments do not become short but rather slide pass each other. Because of sliding of actin filaments over myosin the length of I-band will change.