Secondary_...-_Nervous_System1._PPT.pptx

This document outlines key concepts related to the nervous system. It defines neurons and their parts, and describes how nerve impulses are transmitted. It explains the structure and function of the central nervous system, including the brain regions and spinal cord. It also outlines the peripheral nervous system, somatic vs autonomic systems, and the sympathetic and parasympathetic divisions. Finally, it provides overviews of the main sensory organs - eye, ear, taste/smell, and touch receptors.

The human nervous system is composed of the central nervous system (brain and spinal cord) and the peripheral nervous system. The nervous system contains neurons that transmit electrochemical signals throughout the body to control and regulate functions. There are three main types of neurons - unipolar, bipolar, and multipolar - which receive and transmit signals through dendrites, axons, and synapses using neurotransmitters. The central nervous system consists of the brain, which is divided into the forebrain, midbrain, and hindbrain, and the spinal cord. The peripheral nervous system connects the central nervous system to the rest of the body and controls both voluntary and involuntary functions through the somatic and autonomic nervous systems.

The human nervous system is composed of the central nervous system (brain and spinal cord) and the peripheral nervous system. The nervous system contains neurons that transmit electrochemical signals throughout the body to control and regulate functions. There are three main types of neurons - unipolar, bipolar, and multipolar - which receive and transmit signals through dendrites, axons, and synapses using neurotransmitters. The central nervous system consists of the brain, which is divided into the forebrain, midbrain, and hindbrain, and the spinal cord. The peripheral nervous system connects the central nervous system to the rest of the body and controls both voluntary and involuntary functions through the somatic and autonomic nervous systems.

The nervous system is divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS contains the brain and spinal cord. The brain is divided into three main parts - the cerebrum, cerebellum, and brain stem. The cerebrum is the largest part and is responsible for functions like learning, senses, and control of movement. The cerebellum aids in balance and muscle coordination. The spinal cord transmits signals between the brain and the rest of the body through spinal nerves. Neurons are the basic working units that transmit signals in the nervous system through electrical and chemical processes.

The human nervous system consists of two main parts: the central nervous system comprising the brain and spinal cord, and the peripheral nervous system of nerves throughout the body. There are two types of actions - voluntary actions that require thinking and are slower, mainly controlled by the brain, and involuntary or reflex actions that occur without thinking and are faster, controlled by the spinal cord to perform life-saving functions. A reflex arc is the pathway by which a reflex action occurs, involving sensory and motor neurons that transmit signals from receptors to effectors like muscles.

The document summarizes the structure and function of the nervous system. It describes the central nervous system as including the brain and spinal cord. The peripheral nervous system is divided into the somatic and autonomic nervous systems. The autonomic nervous system regulates involuntary functions and is composed of the sympathetic and parasympathetic nervous systems. The somatic nervous system controls voluntary movement. Neurons transmit signals via electrical and chemical processes.

The document summarizes the structure and function of the nervous system. It describes the central nervous system as including the brain and spinal cord. The peripheral nervous system is divided into the somatic and autonomic nervous systems. The autonomic nervous system regulates involuntary functions and is composed of the sympathetic and parasympathetic nervous systems. Neurons are specialized cells that transmit signals via electrical and chemical signaling. The basic components of neurons include the cell body, dendrites, axon, and synapses.

The document summarizes the organization and functions of the nervous system. It discusses the following key points: 1. The central nervous system contains over 100 billion neurons with dendrites that receive signals and axons that transmit signals in a forward direction via synapses. 2. There are three major levels of the central nervous system - the spinal cord level controls basic reflexes, the lower brain/subcortical level controls subconscious functions, and the higher brain/cortical level is responsible for thought processes and stores memories. 3. Synaptic transmission occurs either chemically via neurotransmitters like acetylcholine and glutamate, or electrically through direct connections. Neurotransmitters are stored in vesicles and released

The document discusses the nervous system and its components. It describes that the nervous system consists of the central nervous system (CNS), which includes the brain and spinal cord, and the peripheral nervous system (PNS). The PNS has sensory neurons, motor neurons, and is divided into the somatic and autonomic nervous systems. The autonomic nervous system regulates organs and is further divided into the sympathetic and parasympathetic systems. Neurons communicate via synapses using electrical and chemical signals.

This document provides an overview of the nervous system, including its main divisions and components. The nervous system is divided into the central nervous system (CNS), comprising the brain and spinal cord, and the peripheral nervous system (PNS). The CNS is further divided into afferent and efferent divisions for sensory and motor functions. Key cell types include neurons, which communicate via synapses and form reflex arcs, and glial cells like Schwann cells, oligodendrocytes, astrocytes and microglia that support neuronal function.

1. The document describes the organization of the nervous system, which consists of the central nervous system (CNS; brain and spinal cord) and peripheral nervous system (PNS; nerves outside the CNS). 2. The PNS is divided into sensory nerves, which carry signals to the CNS, and motor nerves, which carry signals from the CNS. Motor nerves are involved in voluntary and involuntary functions. 3. The autonomic nervous system is an involuntary part of the PNS and has sympathetic and parasympathetic divisions that regulate functions like heart rate and digestion.

The nervous system is composed of nerves and cells that carry messages between the brain and body. It has two main parts: the central nervous system containing the brain and spinal cord, and the peripheral nervous system containing nerves linking the body to the CNS. Neurons are the basic functional units and communicate chemically or electrically. The nervous system coordinates body functions through sensory input, integration in the CNS, and motor output responses.