Locomotion and ...

What is the type of movable joint present between the atlas and axis?

The property which doesn’t belong to muscle fibres is :

Which of the following is not a part of hip bone?

Aging will be characterised by :

Myoglobin is found to be :

i. highly abundant in muscles of whales and seals .
ii. exhibiting cooperative binding of oxygen.
iii. allowing organisms to hold their breathe longer underwater.

Which of the following is not a part of coxal bone?

Muscular dystrophy is a genetic disorder. MD :

i. It is genetically inherited.
ii. Some people get affected by MD due to mutated dystrophin gene and nutritional defects at the pre-natal age.
iii. Predominantly males are affected by DMD although females can be carriers of it.
iv. Dystrophin is a protein found in tendons.

Polymerisation of actin monomers involves ATP hydrolysis as shown in the following figure : [choose the correct one]

Match the following :

Read the following about joint replacement therapy :

i. Artificial joints are made from the similar material that makes our bones.
ii. Metal or plastic is used to prepare an artificial joint.
iii. Following figure shows a disfunctional joint in the knee.
iv. Above figure shows an artificial joint in the knee.

Look at the following figure of myofibrils 

figure (1), (2), (3), (4) : showing ?

The upright posture in humans is facilitated by :

Sachin suffers from hypoparathyroidism. This can lead him to :

Look at the following figure of movement of the thin filaments

The label x, y, and z are respectively

Each pectoral girdle :

i. has 2 pairs of bones, a pair of clavicle and a pair of scapula.
ii. scapula contains expanded process and glenoid cavity, the latter is for articulation of the head of humerus.

Which disorder is caused due to wild contractions in muscles?

Read the following statements about muscle contraction in humans :
i. chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter.
ii. a neurotransmitter acetylcholine at motor end plate converts electrical energy into mechanical energy.
iii. in a contracted muscle, volume remains the same.
iv. a contracted muscle becomes shorter and thicker.

Match the following bones and their synonyms :

During vigorous exercise :

i. lactic acid accumulates in muscle cells to meet its energy needs immediately.
ii. lactic acid is formed by anaerobic respiration hence oxygen consumption by muscles is reduced.
iii. This reduction in oxygen consumption is called oxygen debt of muscle.

Myasthenia gravis leads to fatigue and weakness. It is not :