Locomotion and Movement

According to the sliding filament theory:

1. The actin filaments slide away from A-band resulting in shortening of sarcomere.
2. Actin and myosin filaments slide over each other to increase the length of the sarcomere.
3. Length of A-band does not change
4. I-band increases in length.

Gout is a type of disorder which leads to:

1. Weakening of bones due to low calcium level
2. Inflammation of joints due to accumulation of uric acid crystals
3. Weakening of bones due to decreased bone mass
4. Inflammation of joints due to cartilage degeneration

Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as :

1. Gout
2. Arthritis
3. Muscular dystrophy
4. Myasthenia gravis

Match List-I with List-II Choose the correct answer from the options given below

1. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
2. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
3. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
4. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)

During muscular contraction which of the following events occur? Choose the correct answer from the options given below.

1. B, D, E and A only
2. A, C, D and E only
3. A, B, C and D only
4. B, C, D and E only

Match the following columns and select the correct option.

1. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
2. (a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
3. (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
4. (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

Select the correct option :

1. Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum
2. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs
3. 8th, 9th and 10th pairs of ribs articulate directly with the sternum
4. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.

Which of the following muscular disorders is inherited?

1. Myasthenia gravis
2. Botulism
3. Tetany
4. Muscular dystrophy

Calcium is important in skeletal muscle contraction because it

1. detaches the myosin head from the actin filament
2. binds to troponin to remove the masking of active sites on actin for myosin
3. prevents the formation of bonds between the myosin cross bridges and the actin filament
4. activates the myosin ATPase by binding to it

Which of the following hormones can play a significant role in osteoporosis?

1. Estrogen and parathyroid hormone
2. Aldosterone and prolactin
3. Progesterone and aldosterone
4. Parathyroid hormone and prolactin