Tag: coordination

Questions Related to coordination

A typical value of resting membrane potential is ______________.

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

  1. $-100$mV

  2. $-70$mV

  3. $-40$mV

  4. $-60$mV

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Correct Option: B
Explanation:

The electrical potential difference across the resting plasma membrane is called as the resting potential. Its value is $-70$ mV.

A touch on the right hand stimulates neurons in the

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

  1. Left somatic sensory area

  2. Left occipital lobe

  3. Right somatic sensory area

  4. Right occipital lobe

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Correct Option: A

The release of chemical messenger from synaptic vesicles is under the influence of which of these ion(s)?

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

  1. Cl-

  2. Fe++ and s++

  3. Ca ++

  4. Mg++ and Sr++

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Correct Option: C

An action potential travelling along an axon

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

  1. Moves rapidly in both direction

  2. Moves faster than a neurotransmitter

  3. Is slowed by myelin

  4. Travels through the blood

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Correct Option: B
Explanation:

A neurotransmitter is a chemical messenger that carries, boosts and modulates signals between neurons and other cells in the body. In most cases, a neurotransmitter is released from the axon terminal after an action potential has reached the synapse. The neurotransmitter then crosses the synaptic gap to reach the receptor site of the other cell or neuron. 

An action potential is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, which follows a consistent trajectory. Action potentials occur in several types of animal cells, called excitable cells, which include neurons, muscle cells, and endocrine cells, as well as in some plant cells. So, the correct answer is option B.

During depolarization, the outer surface of the membrane becomes

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

  1. Negatively charged

  2. Positively charged

  3. Neutrally charged

  4. None of these

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Correct Option: A