Chapter: Locomotion and Movements

During muscular contraction, which of the following events occur?
I. ‘H’ zone disappears
II. ‘A’ band widens
III. ‘I’ band reduces in width
IV. Myosine hydrolyses ATP, releasing the ADP and Pi
V. Z-lines attached to actins are pulled inwards.
Choose the correct answer from the options given below.

Calcium is important in skeletal muscle contraction because it

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

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

Smooth muscles are

The H-zone in the skeletal muscle fibre is due to

Which one of the following is the correct pairing of a body part and the kind of muscle tissue that moves it?

The contractile protein of skeletal muscle involving ATPase activity is

ATPase enzyme needed for muscle contraction is located in

Which statement is correct for muscle contraction?

What is sarcomere?

The functional unit of contractile system in striated muscle is

Which of the following is the contractile protein of a muscle?

Which ion is essential for muscle contraction?

Intercostal muscles occur in

Match the List I with List II.
List I                                                                   List II
A. Scapula                                           1. Cartilaginous joints
B. Cranium                                         2. Flat bone
C. Sternum                                         3. Fibrous joints
D. Vertebral column                         4. Triangular flat bone
Choose the correct answer from the options given below.

Select the incorrectly matched pair from following.

Match the following columns and select the correct option.
       Column I                               Column II
A. Floating ribs                1. Located between second and seventh ribs
B. Acromion                     2. Head of the humerus
C. Scapula                         3. Clavicle
D. Glenoid cavity            4. Do not connect with the sternum

Select the correct option.

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.

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

An acromion process is characteristically found in the

What will happen if ligaments are cut or broken?

Which one of the following is a skull bone?

Ligament is a

Tendon is made up of

Total number of bones in the hind limb of man is

The lower jaw in mammals is made up of

The number of floating ribs, in the human body, is

Which is a part of pectoral girdle?

Long bones function in

A deltoid ridge occurs in

Number of cervical vertebrae in camel is

Extremities of long bones possess cartilage

Match the following joints with the bones involved Column I & Column II
Column I                                         Column II
1. Gliding joint                (i) Between carpal and metacarpal of thumb
2. Hinge joint                 (ii) Between atlas and axis
3. Pivot joint                   (iii) Between the carpals
4. Saddle joint                (iv) Between humerus and ulna
Select the correct option from the following

The pivot joint between atlas and axis is a type of

Which of the following joints would allow no movement?

Select the correct matching of the type of the joint with the example in human skeletal system
  Types of Joint                                         Example
(1) Cartilaginous joint                           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

The characteristics and an example of a synovial joint in humans is
Characteristics                                                                                                            Examples
(P) Fluid cartilage between two bones, limited movements                             Knee joints
(Q) Fluid filled between two joints, provides cushion                                       Skull bones
(R) Fluid filled synovial cavity between two bones                                           Joint between atlas and axis
(S) Lymph filled between two bones, limited movement                               Gliding joint between carpals

Elbow joint is an example of

Which of the following pairs, is correctly matched?

The joint found between sternum and the ribs in humans is

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

Match the following columns and select the correct option from the codes given below.
     Column I                                                   Column II
A. Gout                                        1. Decreased levels of estrogen
B. Osteoporosis                         2. Low Ca²⁺ ions in the blood
C. Tetany                                     3. Accumulation of uric acid crystals
D. Muscular dystrophy                 4. Autoimmune disorder

Which of the following muscular disorders is inherited?

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

Select the correct statement with respect to locomotion in humans.

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