Locomotion and Movement

During muscle contraction in humans, the

1. sarcomere does not shorten
2. A band remains same
3. A, H and I bands shorten
4. actin filaments shorten.

Select the correct statement with respect to disorders of muscles in humans.

1. Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing.
2. Accumulation of urea and creatine in the joints causes their inflammation.
3. An overdose of vitamin D causes osteoporosis.
4. Rapid contractions of skeletal muscles cause muscle dystrophy.

Which one of the following pairs of chemical substances, is correctly categorised ?

1. Secretin and rhodopsin - Polypeptide hormones
2. Pepsin and prolactin - Two digestive enzymes secreted in stomach
3. Troponin and myosin - Complex proteins in striated muscles
4. Calcitonin and thymosin - Thyroid hormones

Select the correct statement regarding the specific disorder of muscular or skeletal system.

1. Muscular dystrophy – Age related shortening of muscles
2. Osteoporosis – Decrease in bone mass and higher chances of fractures with advancing age
3. Myasthenia gravis – Autoimmune disorder which inhibits sliding of myosin filaments
4. Gout – Inflammation of joints due to extra deposition of calcium

Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.

1. array|l|l| Pair of skeletal parts & Category \ Sternum and ribs & Axial skeleton \ array
2. array|l|l| Pair of skeletal parts & Category \ Clavicle and glenoid & Pelvic girdle \ array
3. array|l|l| Pair of skeletal parts & Category \ Humerus and ulna & Appendicular skeleton \ array
4. array|l|l| Pair of skeletal parts & Category \ Malleus and stapes & Ear ossicles \ array

Which one of the following pairs of structures is correctly matched with their correct description?

1. Structure Tibia and fibula, Description Both form parts of knee joint
2. Structure Shoulder joint and elbow joint, Description Ball and socket type of joint
3. Structure Cartilage and cornea, Description No blood supply but do require oxygen for respiratory need
4. Structure Premolars and molars, Description 20 in all and 3-rooted

Which one of the following is the correct description of a certain part of a normal human skeleton?

1. Parietal bone and the temporal bone of the skull are joined by fibrous joint.
2. First vertebra is axis which articulates with the occipital condyles.
3. The 9th and 10th pairs of ribs are called the floating ribs.
4. Glenoid cavity is a depression to which the thigh bone articulates.

Low Ca++ in the body fluid may be the cause of

1. tetany
2. anaemia
3. angina pectoris
4. gout

Which one of the following is the correct matching of three items and their grouping category?

1. array|l|l| Items & Group \ Ilium, ischium, pubis & Coxal bones of pelvic girdle \ array
2. array|l|l| Items & Group \ Actin, myosin, rhodopsin & Muscle proteins \ array
3. array|l|l| Items & Group \ Cytosine, uracil, thiamine & Pyrimidines \ array
4. array|l|l| Items & Group \ Malleus, incus, cochlea & Ear ossicles \ array

Elbow joint is an example of

1. hinge joint
2. gliding joint
3. ball and socket joint
4. pivot joint.