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प्रश्न
Compare and contrast.
Sympathetic Nervous System and Parasympathetic Nervous System
उत्तर
Sympathetic Nervous System and Parasympathetic Nervous System are parts of Autonomic Nervous System. Sympathetic nervous system prepares our body to face stressful and threatening situations. It prepares us for a 'flight or fight' reaction. For example, if you are chased by a dog, your heartbeat and breathing rate increases and you start sweating. Parasympathetic Nervous System takes over when the situation becomes normal. When this system takes over, your heart rate, palpitation and sweating becomes normal. We regain our composed state. It directs our body to store energy for emergencies.
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संबंधित प्रश्न
Marine fish when placed in tap water bursts because of:
A. Endosmosis
B. Exosmosis
C. Diffusion
D. Plasmolysis
Given below is the diagram of a neuron. Name the parts numbered 1-5.
Fill in the blank:
The neurons carrying impulses from the brain to the muscles are called _______________________.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Repolarisation - Depolarisation - Resting (polarised) (during conduction of nerve impulse through a nerve fibre)
Name the following:
Structural and metabolic unit of nervous tissue.
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
The neurons which carry impulse from the central nervous system to the muscle fibre.
Impulses travels rapidly in ______ neurons.
Write one word for the following:
A bundle of axons enclosed in a tubular sheath.
Define the following term:
Synaptic cleft
