Tag: biology

Questions Related to biology

Transverse nerve fibres found in hind brain represent

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Crura cerebri

  2. Pons varolli

  3. Arbor vitae

  4. Choroid plexus

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Correct Option: B

Node of Ranvier occurs over

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Muscle

  2. Dendrite

  3. Right auricle

  4. Axon

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Correct Option: D

Homoeostasis is maintained by

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Cerebellum

  2. Cerebrum

  3. Diencephalon

  4. Medulla oblongata

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Correct Option: C

Temporal lobe does not contain

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Wernickes area

  2. Olfactory area

  3. Auditory area

  4. Brocas area

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Correct Option: D

Foramen of Monro connects

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Diocoel with paracoel

  2. Diocoel with metacoel

  3. Diocoel with epicoel

  4. Epicoel with metacoel

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Correct Option: A

Synaptic delay lasts for

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. 0.1 ms

  2. 0.5 ms

  3. 0.3 ms

  4. 0.4 ms

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Correct Option: B

The processes that occur during repolarisation of nerve fibres are 
(i) Open N$a^+$ channels 
(ii) Closed N$a^+$ channels 
(iii) Closed $K^+$ channels 
(iv) Open $K^+$ channels

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. (ii) and (iii)

  2. (i) and (ii)

  3. (ii) and (iv)

  4. (i) and (iii)

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Correct Option: C

Nerve fibre in resting stage is 

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Less permeable to $K^+$

  2. Semipermeable

  3. More permeable to $K^+$

  4. All the above

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Correct Option: C

Primary function of myelin sheath around vertebrate axon is to

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Regulate Na-K pump

  2. Increase in size of action potential

  3. Increase in speed of conduction by preventing leakage of nerve impulse

  4. Deactivate the release of neurotransmitter

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Correct Option: C

Characteristics of graded potential is

biology coordination generation and conduction of nerve impulse generation of nerve impulse neurons and synapses

  1. Always followed by a refractory period

  2. Amplitude is always the same

  3. Duration and strength varies

  4. All or none response

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Correct Option: C