Locomotion and Movement

Choose the correct statements regarding muscle contraction. Choose the correct answer from the options given below:

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

Which of the following statements are correct with reference to human endoskeleton? Choose the correct answer from the options given below:

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

Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?

1. Femur-tarsal-patella-tibia
2. Femur-tibia-patella-tarsal
3. Patella-femur-tibia-tarsal
4. Femur-patella-tibia-tarsal

The number of vertebrae in a human is .

1. 206
2. 7
3. 12
4. 26

Sperm motility is due to .

1. muscular movement
2. flagellar movement
3. ciliary movement
4. amoeboid movement

Muscle contraction is initiated by a signal sent by the central nervous system by the release of .

1. cyclic adenosine monophosphate
2. acetylcholine
3. acetyl coenzyme A
4. cyclic guanosine monophosphate

Which of the following is the correct order of arrangement of vertebral column from the head to toe?

1. Cervical vertebra, thoracic vertebra, lumbar vertebra, sacrum
2. Cervical vertebra, thoracic vertebra, sacrum, lumbar vertebra
3. Sacrum, lumbar vertebra, thoracic vertebra, cervical vertebra
4. Cervical vertebra, lumbar vertebra, thoracic vertebra, sacrum

Which of the following are Autoimmune disorders? Choose the most appropriate answer from the options given below:

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

Select the correct statements regarding mechanism of muscle contraction. Choose the most appropriate answer from the options given below:

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

Which of the following statements are correct regarding skeletal muscle? Choose the most appropriate answer from the options given below:

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

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
3. (A) is correct but (R) is not correct
4. (A) is not correct but (R) is correct

Which of the following is a correct match for disease and its symptoms?

1. Arthritis - Inflamed joints
2. Tetany - High Ca2+ level causing rapid spasms
3. Myasthenia gravis - Genetic disorder resulting in weakening and paralysis of skeletal muscle
4. Muscular dystrophy - An auto immune disorder causing progressive degeneration of skeletal muscle

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

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

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

The pivot joint between atlas and axis is a type of

1. cartilaginous joint
2. synovial joint
3. saddle joint
4. fibrous joint.

Out of 'X' pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation.

1. X = 12, Y = 5; True ribs are attached dorsally to vertebral column and sternum on the two ends
2. X = 24, Y = 2; The true ribs are dorsally attached to vertebral column but are free on ventral side
3. X = 24, Y = 12; True ribs are dorsally attached to vertebral column but are free on ventral side
4. X = 12, Y = 7; True ribs are attached dorsally to vertebral column and ventrally to the sternum

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

1. tetanus
2. tonus
3. spasm
4. fatigue.

Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

1. Calcium
2. Magnesium
3. Sodium
4. Potassium

Osteoporosis, an age-related disease of skeletal system, may occur due to

1. immune disorder affecting neuromuscular junction leading to fatigue
2. high concentration of Ca++ and Na+
3. decreased level of estrogen
4. accumulation of uric acid leading to inflammation of joints.

Which of the following is not a function of the skeletal system?

1. Production of body heat
2. Locomotion
3. Production of erythrocytes
4. Storage of minerals

Which of the following joints would allow no movements?

1. Synovial joint
2. Ball and Socket joint
3. Fibrous joint
4. Cartilaginous joint

Sliding filament theory can be best explained as

1. actin and myosin filaments do not shorten but rather slide past each other
2. when myofilaments slide past each other, myosin filaments shorten while actin filaments do not shorten
3. when myofilaments slide past each other actin filaments shorten while myosin filaments do not shorten
4. actin and myosin filaments shorten and slide past each other.

Glenoid cavity articulates

1. clavicle with scapula
2. humerus with scapula
3. clavicle with acromion
4. scapula with acromion.

Select the correct matching of the type of the joint with the example in human skeletal system.

1. Cartilaginous – Between frontal and parietal
2. Pivot joint – Between third and fourth cervical vertebrae
3. Hinge joint – Between humerus and pectoral girdle
4. Gliding joint – Between carpals