Ques: What is the main function of the human hind-brain? What are the two most essential components of the hind-brain and what are their functions? (3 Marks)Īns: The primary function of the human hind-brain is to control the reflexes and actions of involuntary organs of the human body. Furthermore, the axon carries and transmits signals away from the cell body. Axon is a long fibre that has a branch-like structure in one of its ends. Furthermore, the dendrite carries and transmits signals to the cell body. Dendrites are the short fibres that protrude out from the cell body. The cell body consists of Nissl's granules that are typically a cytoplasm having a granular body. (3 Marks)Īns: The three most essential components of the nervous system are the cell body, axon and dendrite. Ques: What are the three most essential components of the nervous system? Describe with a diagram. It carries and transmits signals away from the cell body. Axon is a long fibre that has a branch-like structure in one of its ends.They carry and transmit signals to the cell body. Dendrites are the short fibres that protrude out from the cell body.Peripheral Nervous System is divided into the somatic nervous system and autonomic nervous system.The central nervous system is the part of the nervous system which deals with information processing and control.The human nervous system is divided into two types- central nervous system and peripheral nervous system.Neurons in our body detect, receive and transmit reactions and stimuli.Axons, dendrite and cell body are the three most essential components of neurons.There is no synaptic vesicle in the dendrite. The root of each axon has a synaptic vesicle. The ends of the dendrites conclude into branches.Īxons are present in the discharging end of the neuron.ĭendrite is present in the receiving end of the neurons. Uniformity of thickness is maintained throughout their length. Multiple dendrites are present with a nerve cell.Īxons transmit signals away from the cell body.ĭendrite transmits signals towards the cell body. The gap or space between two nearby myelinated layers is called the Nodes of Ranvier.įollowing are the differences between axon and dendrite.Non-myelinated nerve fibres are surrounded by Schwan cells that do not form sheath or layer around the axon.Myelinated nerve fibres are surrounded by Schwan cells that form a sheath or layer around the axon.Axon is further classified into two types: myelinated and non-myelinated.Neurons of this kind are found in the cerebral cortex.
Multipolar neurons contain a cell body with one axon and two or more dendrites.Neurons of this kind are primarily found in the retina of the eyes. A bipolar neuron contains a cell body with one axon and one dendrite.The neuron of this kind is mainly found in the embryonic stage. A unipolar neuron contains a cell body with only one axon.Those three kinds are Unipolar, bipolar and multipolar. Neurons are classified into three kinds based on the number of axons and dendrites.
The Somatic Nervous system is the carrier of signals from the Central Nervous System to the skeleton-muscular system of the body, while the autonomic nervous system acts as the carrier of signals from the Central Nervous System to involuntary parts of the body. Peripheral Nervous System is divided into two components based on their functioning: The functioning of the peripheral nervous system revolves around the central nervous system. Therefore, it forms the bedrock of the Nervous System on which the other functions of the Nervous System work. The Central Nervous System consists of the brain and spinal cord. The Central nervous system is the part of the nervous system which deals with information processing and control. The human nervous system is divided into two components: To understand the axon, dendrite and their differences, it is essential to know about the nervous systems present in humans.
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