NEET BIOLOGY

Detailed explanation-1: -Nervous or the nerve tissue is the main tissue of our nervous system. It monitors and regulates the functions of the body. Nervous tissue consists of two cells: nerve cells or neurons and glial cells, which helps transmit nerve impulses and also provides nutrients to neurons.

Detailed explanation-2: -Glial (Neuroglial) cells do not conduct nerve impulses, but, instead, support, nourish, and protect the neurons. Glial cells are far more numerous than neurons and, unlike neurons, are capable of mitosis.

Detailed explanation-3: -Nervous tissue is characterized as being excitable and capable of sending and receiving electrochemical signals that provide the body with information. Two main classes of cells make up nervous tissue: the neuron and neuroglia (Figure 4.5.

Detailed explanation-4: -Neurons are the basic unit of nervous tissue and are made up of three major parts: cell body, dendrites and axons. Neurons are protected by a type of cell called neuroglial cell. The neuroglial cells produce a covering called myelin sheath around nerve fibres which increases the speed of the nerve impulse conduction.

Detailed explanation-5: -The nervous system uses tiny cells called neurons (NEW-ronz) to send messages back and forth from the brain, through the spinal cord, to the nerves throughout the body.