Multiple Choice QuestionsThe globular head of myosin contains
Calcium ions in large quantities
Troponin
ATPase enzyme
ATP
Dense regular connective tissue is present in
ligament and tendons
Joint capsule and Wharton's jelly
Periosteum and endosteum
Pericardium and heart valves
Sliding filament theory can be best explained as
When myofilaments slide pass each other actin filaments shorten while myosin filament does not shorten
Actin-myosin filaments shorten and slide pass each other
Actin and myosin filaments do not shorten, but rather slide pass each other
When myofilament slide passes each other myosin filament shorten while actin filament do not shorten.
Select the correct combination of statements regarding Myasthenia gravis.
I, III, IV,V
I, III,V II
I, II, IV, V
II, III, IV, V
A.
I, III, IV,V
Statements I, II, IV and V are correct. Myasthemia Gravis is an auto immune neuromuscular disease that is congenital. It leads to muscle weakness. It caused by circulating to muscle weakness. It is caused by circulating antibodies that block acetylcholine receptors at the post-synaptic neuromuscular junction inhibiting the excitatory effects of acetylcholine and nicotic receptors at neuromuscular junctions. The first noticeable symptom is weakening of eye muscle leading to drooping of eyelids.
It is treated medically with acetylcholine esterase inhibitors or immuno-suppressants.
What will happen if ligaments are torn?
Bone will become unfixed
Bone will become fixed
Bone less movable at joint and pain
Bone will move freely at joint and no pain
Achondroplasia is a disease related with the defect in the formation of
membrane
mucosa
bone
cartilage
Yellow bone marrow is found specially in the medullary cavity
Long bones
Spongy bones
Short bones
All of the above
Match the items of column I with column II and choose the correct option from the codes given below.
| Column I | Column II |
| A. Neuron | 1. Ossein |
| B. Bone-matrix | 2. Nissl’s bodies |
| C. RBCs of man | 3. Antibodies |
| D. Lymphocytes | 4. Non-nucleated |
| A | B | C | D |
| 4 | 1 | 2 | 3 |
| A | B | C | D |
| 2 | 1 | 4 | 3 |
| A | B | C | D |
| 3 | 4 | 1 | 2 |
| A | B | C | D |
| 2 | 3 | 4 | 1 |
Change in the number of body parts is called
Continuous variation
Discontinuous variation
Meristic variation
Substantive variation
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