Which of the following destroys the acetylcholinesterase?
1.  Malathion
2.  CO
3.  KCN
4.  Colchicine

Botulism affects:
1.  Digestive system
2.  Blood vascular system
3.  Nervous system
4.  Respiratory system

Which of the following is an effect of anaesthetics on the body?
1.  Inhibits Na–K pump
2.  Kills nerves
3.  Stops brain functions
4.  Inactivates skin cells

Deficiency of oxygen affects which organ the most:
1.  Brain
2.  Skin
3.  Kidney
4.  Intestine

The simplest reflex action in humans is:
1.  Mono synaptic
2.  Bi-synaptic
3.  Tri-synaptic
4.  Poly-synaptic

Depolarization of axolemma during nerve conduction takes place because of:
 

Which of the following statement is correct for the node of Ranvier of nerve:

1. Neurilemma is discontinuous

2. Myelin sheath is discontinuous

3. Both neurilemma & Myelin sheath are discontinuous

4. Covered by myelin sheath

What used to be described as Nissel granules in a nerve cell are now identified as:

1. Cell metabolites

2. Fat granules

3. Ribosomes

4. Mitochondria

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:

1. K⁺ and Na⁺ out of the cell

2. Na⁺ into the cell

3. Na⁺ out of the cell

4. K⁺ into the cell 

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells:

1. Osteocytes

2. Liver cells

3. Neurons

4. Malpighian layer of the skin