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:
1. | Equal amount of Na+ & K+ moves out across axolemma |
2. | Na+ ions move inside |
3. | More Na+ ions are outside |
4. | None of the above |
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