Methods in Biology-Electrophysiological Methods [CSIR (Council of Scientific & Industrial Research) Life Sciences]: Questions 1 - 3 of 11

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Question 1

Appeared in Year: 2010

Question MCQ▾

Which instrument is used to measure electrical activity of heart? (June)

Choices

Choice (4)Response

a.

Sphygmomanometer

b.

Electrocardiogram

c.

Electrocardiograph

d.

Electroencephalogram

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Question 2

Appeared in Year: 2012

Question MCQ▾

The T – waves of ECG indicates that (December)

Choices

Choice (4)Response

a.

Atrial depolarization

b.

Ventricular depolarization

c.

Ventricular redepolarization

d.

All of the above

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Question 3

Appeared in Year: 2018

Question MCQ▾

The conduction velocity of action potential in a myelinated nerve fibre was much greater than that of an unmyelinated fibre of the same diameter. The following statements were proposed to explain this observation. (December)

1. The speed of conduction in a nerve fibre is determined by the plasma membrane resistance and axial resistance of axonal cytoplasm.

2. The electrical properties of myelinated and unmyelinated nerve fibres are not similar

3. The myelin sheath decreases the effective membrane resistance.

4. The magnitude of an electronic potential decreases more with distance along the axon in myelinated nerve fibres than that of unmyelinated fibres.

5. The voltage-gated Na + channels are highly concentrated at the nodes of Ranvier.

Choose one of the following combinations with both INCORRECT statements.

Choices

Choice (4)Response

a.

2 and 3

b.

3 and 4

c.

4 and 5

d.

1 and 2

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