Advertisements
Advertisements
प्रश्न
Write a short note.
Autonomic Nervous System
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Draw a labelled diagram of the following:
Neuron
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
Distinguish between Cranial nerves and spinal nerves.
Renal cortex and Renal medulla [Parts of the nephrons present]
Identify the odd one in each set : Cyton, Photon, Axon, Dendron
Name the following :
The layer of the eyeball that forms the transparent Cornea
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
Differentiate between the following pair of terms:
Motor nerve and sensory nerve.
Fill in the blank:
Basic structural unit of the nervous system is the________.
Fill in the blanks:
A neuron consists of ________ , _________ and ________.
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)
____________ are the building blocks of the nervous system.
___________ nervous system prepares us for the fight or flight responses.
Identify the odd item from the following series of words.
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.
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 ______.
Impulses travels rapidly in ______ neurons.
______ carries the impulse towards the cell body.
How nerve impulses are transferred from one neuron to the next neuron?
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?
Dendrons are the longest fibres that conduct impulses away from the cell body.
What does the neural tissue consist of?
Identify the INCORRECT statement regarding multipolar neuron.
____________ is the interconnection between two neurons or neuron with motor organ.
Which cells form a single layer of squamous or columnar often ciliated epithelial cells lining the ventricle?
Which cells are responsible for formation of myelin sheath?
______ is the gap between the axon of one terminal neuron and the dendrites of next neuron.
In a neuron, conversion of electrical signal to a chemical signal occurs at/in
Rearrange the following in the correct order of involvement in electrical impulse movement-
Synaptic knob, dendrites, cell body, Axon terminal, Axon
Write one word for the following:
Long thread-like part of the nerve cell.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Axons : Nerve :: Cytons : ______.
Name the following:
Three types of nerves.
Define the following term:
Nerve
Distinguish between the following pair:
Nerve impulse and flow of electricity (transmission and speed)
Give reason:
Neurotransmitters are broken down by an enzyme just after passing an impulse from one neuron to the other.
