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MHT-CET : Biology Entrance Exam

MHT - CET : Biology - Nervous Coordination Glossary

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                     Neurons: The nerve cells are called neurons.

                     Nervous System: The system which controls and co-ordinates the various activities of the body is called the nervous system.

                     Brain Stem: Brain stem is the lower cylindrical part of the brain that holds up the cerebrum and cerebellum.

                     Cranium: The part of the skull that encloses the brain is called cranium.

                     Midbrain: The midbrain is a small, stalk-like structure, which connects the pons and the cerebellum with the cerebral hemispheres.

                     Cerebrum: The forebrain of an animal is called cerebrum. The cerebrum consists of two lobes called cerebral hemispheres.

                     Pons Varolii: Pons is a strip of tissue which lies below the midbrain and above the medulla oblongata.

                     Medulla Oblongata: It is the lowermost part of the brain stem. It is somewhat cylindrical and is continued behind as the spinal cord.

                     Cerebellum: It is the part of the brain that lies just below the cerebrum, dorsal to the brain stem. The cerebellum consists of two hemispheres called cerebellar hemispheres.

                     Pituitary Gland: It is the chief endocrine gland of vertebrates. It secretes a number of hormones that control a wide range of body functions.

                     Spinal Cord: A long, flattened cord of nervous tissue extending from the medulla to the 2nd lumbar vertebra.

                     Cranial Nerves: The nerves that are connected with the brain and emerge out through the openings of the cranium are called cranial nerves.

                     Spinal Nerves: The nerves that arise from the spinal cord are called spinal nerves.

                     Receptors: Structures that receive stimuli are called receptors.

                     Effectors: Structures which respond to the various stimuli are called effectors.

                     Bioluminiscent: Light producing

                     Reflex Action: The automatic and rapid response to a stimulus is called reflex action. Example: the sudden withdrawal of the arm when it is pricked with a pin.

                     Reflex Arc: The path through which the impulse travels during reflex action is called reflex arc.

                     Synapses: Synapses are connecting links of neurons associated with reflex action mechanism. For example, the adjustor neuron and the motor neuron are connected through synapses.

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