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प्रश्न
Write a short note.
Autonomic Nervous System
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उत्तर
Peripheral Nervous System consists of the Somatic Nervous System and the Autonomic Nervous System. Autonomic Nervous System is further divided into the Sympathetic and Parasympathetic Nervous System. Autonomic Nervous System controls internal activities of human body including heart rate, breathing, digestion, disposal of waste products and toxins.
Sympathetic nervous system prepares our body to face stressful and threatening situations. It prepares us for the "flight or fight" reaction. For example, when you are chased by a dog, that time your heartbeat, palpitation increases and you start sweating. The job of the system is just opposite to its name.
Parasympathetic Nervous System takes over when the situation becomes normal. When this system takes over, your heart rate, palpitation, and sweating become normal. We regain our cool and composed state. It directs our body to store energy for emergencies.
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संबंधित प्रश्न
Draw a labelled diagram of the following:
Neuron
Differentiate between Dendrites and axons.
Renal cortex and Renal medulla [Parts of the nephrons present]
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:
Dendrites, Medullary sheath, Axon, Spinal cord
Mention the exact location of Hydathodes
Differentiate between the following pair of terms:
Receptor and effector.
Differentiate between the following pair of terms:
Motor nerve and sensory nerve.
Describe three kinds of nerves, giving the example of each.
State whether the following statement is true (T) or false (F):
Each neuron consists of three parts called cell body, cyton and axon.
Mention the types of nerves found in humans.
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
axon endings → nucleus → Dendrites → axon → perikaryon → Dendron(Neutron structure)
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Axon, Dendron, Photon, Cyton
Name the following:
The nerve which carry impulse from CNS to muscles.
Write whether the following is true or false:
Axon of one neuron communicates with other nerve cell through synapse.
Explain the following term :
Motor nerve
____________ are the building blocks of the nervous system.
___________ nervous system prepares us for the fight or flight responses.
During synaptic transmission of nerve impulse, neurotransmitter (P) is released from synaptic vesicles by the action of ions (Q). Choose the correct P and Q.
All of the following are associated with the myeline sheath except
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
Nerve cells do not possess ______
Impulses travels rapidly in ______ neurons.
______ carries the impulse towards the cell body.
How nerve impulses are transferred from one neuron to the next neuron?
The structural and functional units of the nervous system is ______.
What does the neural tissue consist of?
Identify the INCORRECT statement regarding multipolar neuron.
______ is the gap between the axon of one terminal neuron and the dendrites of next neuron.
A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called ____________.
Which part of a nerve cell contains a nucleus?
Assertion: Impulse travels from dendrite to cell body and then along the axon to its end.
Reason: Information acquired at the end of the dendrite tip of a nerve cell sets of an electric impulse.
Electrical impulse travels in a neuron from
What is the correct direction of flow of electrical impulses?
Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?
Each branch of the axon terminates as a bulb-like structure called ______
Any factor that can bring a change in the body of an organism is called ______.
Name the following:
Three types of neurons
Define the following term:
Synaptic cleft
