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in electrical synapse, impulse from pre...

in electrical synapse, impulse from presynaptic membrane reaches post-synaptic membrane through

A

Neurotransmitter released in synapticc cleft

B

Through gap junctions present between two synaptic membranes

C

Electrons that jump directly from presynaptic membrane to post-synaptic membrane

D

Opening of `K^+` channels in post -synaptic membrane

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Pre synaptic membrane is part of :

Which of the following statements is/are incorrect about the electrical synapse ? (i)At electrical synapses, the membranes of pre and post synaptic neurons are in very close proximity. (ii)Electricity current can flow directly from one neuron into the other across the synapses. (iii)Transmission of an inpulse across electrical synapses is very similar to impulse conduction along single axon. (iv)Electrical synapses pass electrical signal between cells with the use of Ach. (v)Electrical synapses are fast. (vi)Electrical synapses are rare in our system.

How electrical synapse differs from chemical synapse?

Read the following statements and find out the incorrect statements. a. A synapse is formed by the membranes of a pre-synaptic neuron and a post-synaptic neuron, which may or may not be separated by a gap called synaptic cleft. b. At electrical synapses, the membranes of pre-and post-synaptic neurons are in very close proximity. c. Electrical current can flow directly from one neuron into the other across chemical synapses. d. Impulse trasmission across a chemical synapse is always faster than that across a electric synapse. e. Electrical synapses are rare in our system.

Which option is correct for conduction of nerve impulse along chemical synapse? i. At synapse, the membranes of the pre and postsynaptic neurons are separated by a fluid-filled space called synaptic cleft ii. Chemicals called neurotransmitters are incolved in the transmission of impulses at these synapses iii. The axom terminals contain vesicles filled with these neurotransmitters iv. When an impulse arrives at the axon terminal, synaptic vesicles release their neurotransmitters in the synaptic cleft. v. The release neurotransmitters bind to their specific receptors, present on the pre-synaptic membrane. vi. Opens ion channels allowing the entry of ions which can generate a new potential in the postsynaptic neuron vii. The new potential developed is only excitatory

Which statements are incorrect for mechanism of nerve impulse conduction along electrical junctions of nerous or electrical synapse? i Nerve impulse flow directly from one neuron to other across the synapses in electrical synapses ii. Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon iii. Impulse transmission across an elecetrical synapse is always faster than that across a chemical synapse. iv. Electrical synapses are rare in our system v. At an electrical synapse, the membranes of the pre and post-synaptic neurous are separated by a fluid-filled space called synaptic cleft is thick. vi. Chemicals called neurotransmitters are involved in the transmission of impulses at this synapse

Read the given statements and select the correct ones. (i)Autonomic neural system transmits impulses from the CNS to the voluntary organs and striated muscles of the body. (ii)Unmyelinated nerve fibres do not have Schwann cells which form the myelin sheath. (iii)Axonal membrane of a neuron while not conducting any impulse is comparatively more permeable to potassium ions (K^+) than to sodium ions (Na^+) (iv)A synapse is formed by the membranes of presynaptic neuron and a post synaptic neuron.

Which of the following statements regarding impulse transmission is incorrect ? I . Chemicals called neurotransmitters are involved in impulse transmission across the synapses. II. The membranes of the pre - synaptic and post - synaptic neuron are separated by an empty space called the synaptic cleft. III. The released neurotransmitters bind to the specific receptors present on the pre - synaptic membrane. IV. The new potential which develops is always excitatory.

Which of the following events is involved in the transfer of information across a chemical synapse?(i) Neurotransmitters bind to the postsynaptic receptors.(ii)Calcium channels open in the presynaptic region.(iii) Ion channels open in the postsynaptic membrane.(iv) Direct flow of ions from one neuron to the next.

AAKASH INSTITUTE-TEST 6-EXAMPLE
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  2. Which of the following structure does not participate in hearing?

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  3. in electrical synapse, impulse from presynaptic membrane reaches post...

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  4. Read the following statements Statement-A: Muscle fibres exhibit spec...

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  5. A type of neuron with one axon and one dendrite is found in the human ...

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  6. In relation with movement and locomotion, which of the following state...

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  7. Cortisol can perform all the following functions except

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  8. Opening of which of the following type of channels is responsible for ...

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  9. Choose the incorrect statement w. r. t. thymus gland.

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  10. Select the mismatch.

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  11. Muscularis externa of alimentary canal is characterised by

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  12. Match Column A with Column B and select correct choice in the followin...

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  13. Scapula is a large triangular flat bone, situated in the A part of the...

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  14. Select the Mismatch.

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  15. Select the correct match w.r.t same number of bones.

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  16. Select the correct option with hormones which are poured into veins.

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  17. Hypothalamus contains a number of centres and control all of the foll...

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  18. Select the odd one w.r.t cranial bone

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  19. A motor neuron along with muscle fibres connected to it constitutes a

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  20. All of the following are parts of brain stem except

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