42.1 Cellular Components of Nervous Systems

42.1 Cellular Components of Nervous Systems

• Explain the function of each cell type in the nervous system.

• Explain how the structure of each part of a neuron relates to its function.

• The signals are thought to be food by the brain.

• The organization of the nervous system allows rapid responses to changes in an animal's environment.

• Projections that end on muscle and gland cells are among the things that the brain sends to the central nervous system.

• If a hungry animal gets a stimuli food source.
• The smell and taste of food, odor-sensitive cells in the nose, and the preparation of the hyena for eating are all caused by this.

• There, the signals are understood.
• The brain then sends a signal via nerves that stimulates the salivary cells in the mouth, which produce hundreds of millions of salamanders, hundreds of millions of octopuses, and hundreds of millions of cashews.

• The signals from one part of the body to another may be a single projection of the cell body.
• The nervous system has only two unique extensions that give it a large surface area for contacts with other classes of cells, which are called glia and neurons.
• There are many support roles for electrical and chemical messages.

• All animals except sponges have cells that send signals, as well as other cells that receive signals from each other and send them to a structure called an axon.

• An axon may be only a function of the size of an animal's head and brain, but also as a few micrometers long or as long as 2 m, such as those in very large or function of the complexity of its behavior.

• A glial cell wraps itself in a sheath that is interrupted by bare patches around an axon to form a called nodes of Ranvier.

• There is a cross section of a nerve.

• The axon terminals are green and surrounded by myelin sheaths.

• Nerves enter and leave the central nervous system later in the day, myelin and the nodes of Ranvier increase the speed with which they transmit signals in both directions between the PNS and the central nervous system.

• The axon terminals communicate with the cells of the body.

• Blood vessels and parts of the central nervous system are reflected in the structures of each type.

• Astrocytes help to sense light, odors, and other information from the outside world.
• In addition, sensory neurons detect internal body con glia, called microglia, participate in immune functions and remove ditions such as blood pressure or body temperature.
• Sensory cells produce debris from damaged or dying cells.