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प्रश्न
Compare and contrast.
Sympathetic Nervous System and Parasympathetic Nervous System
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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
Draw a labelled diagram of the following:
Brain
Differentiate between Dendrites and axons.
Briefly explain the following terms: Synapse
Draw neat and labelled diagrams of a myelinated neuron
The number of Spinal nerves in a human being are :
(A) 31 pairs
(B) 10 pairs
(C) 21 pairs
(D) 30 pairs
Mention the exact location of Malleus
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.
Define the term Sensory neuron.
Define the term Motor neuron.
Describe the two parts of the nervous system.
Mention the types of nerves found in humans.
Differentiate between following pair with reference to the aspect in bracket.
Sensory nerve and motor nerve (direction of impulse carried)
Rearrange the following in correct sequence pertaining to what is given within brackets at the end.
Effector - Sensory neuron - Receptor - Motor neuron - Stimulus - Central nervous system Response (Reflex arc)
Name the following:
The third neuron that is involved in reflexes, other than simple reflex.
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
Differentiate between:
Rods and Cones.
All of the following are associated with the myeline sheath except
When the potential across the axon membrane is more negative than the normal resting potential, the neuron is said to be in a state of ______.
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
______ carries the impulse towards the cell body.
A neuron contains all cell organelles except ______.
Classify neurons based on their structure.
Our body contains a large number of cells ‘L’ which are the longest cells in the body. L has long and short branches called ‘M’ and ‘N’ respectively. There is a gap ‘O’ between two ‘L’ cells, through which nerve impulse transfer by the release of chemical substance ‘P’.
(i) Name the cells L?
(ii) What are M and N?
(iii) What is the gap O?
(iv) Name the chemical substance P?
What does the neural tissue consist of?
What are the different parts of the multipolar neuron?
As compare to medullated nerves, the conduction of impulse by non-medullated nerve fibres is ______ times faster.
Which cells form a single layer of squamous or columnar often ciliated epithelial cells lining the ventricle?
What is the connective tissue covering around the nerve fascicle called?
______ is the gap between the axon of one terminal neuron and the dendrites of next neuron.
Electrical impulse travels in a neuron from
Chemicals which are released at the synaptic junction are called ______.
In the following diagram choose the correct labelling for A, B, C, D and E respectively.
Write one word for the following:
A bundle of axons enclosed in a tubular sheath.
Name the following:
Three types of neurons
