Nervous System McBae

What is the dendrite (part of the neuron)

Spread out from the cell body and are short, branched extensions. Dendrites receive impulses from other neurons and carry impulses to the cell body. There are normally dozens of them

What is the function of the parietal lobe?

reading and speech

What is the function of the thalamus?

receives and relays messages from the sense organs (eyes, ears, tongue, skin, and nose )

What is the function of the occipital lobe?

vision

What is an axon (part of the neuron)

An axon is a long fiber that carries impulses away from the cell body: ends in a series of small swellings called axon terminals. There is only one axon in a neuron

What is the function of the cerebrum?

Controls voluntary activities of the body

What is the function of the cerebellum?

Coordinates and balances the actions of the muscles

What are the four lobes of the brain?

Frontal, temporal, parietal, occipital

What is the myelin sheath

Myelin sheath is an insulating membrane that surrounds the axon and some neurons. It surrounds a single, long axon and has many gaps, called nodes, where the axon membrane is exposed. As an impulse moves along the axon, it jumps from one node to the next. This arrangement causes an impulse to travel faster than it would through an axon without a myelin sheath The insulating envelope of myelin that surrounds the core of a nerve fiber or axon and that facilitates the transmission of nerve impulses,

What are neurotransmitters? hep on this

Neurotransmitters are chemicals that transmit an impulse across a synapse to another cell. chemicals that are necessary to process the synapse

What are reflexes. Give an ex

Reflexes are a quick, automatic response to a stimulus. The way in which you pull your hand back quickly when pricked by a pin is an example of a reflex

What is the function of the brain stem?

Regulates the flow of information between the brain and the rest of the body

Briefly describe the "message" carried by neurons

The "messages" carried by neurons are electrical signals called impulses

Peripheral nervous system- What is the autonomic nervous system? Give a specific ex

The autonomic nervous system regulates activities that are involuntary or not under conscious control. For instance, when you start to run, the autonomic nervous system speeds up your heart rate and blood flow to the skeletal muscles, stimulates the sweat glands, and slows down the contractions of smooth muscles in the digestive system.

What does the central nervous system do? What does it contain?

The central nervous system which consists of the brain and spinal cord, processes the information about the body's external and internal environment and creates a response that is delivered to the appropriate part of the body through the peripheral nervous system. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. CNS controls most functions of the body and mind.

What is the cerebral cortex and what is its function?

The cerebrum consists of two layers. The outer layer of the cerebrum is called the cerebral cortex and consists of densely packed nerve cell bodies known as gray matter.The cerebral cortex processes information from the sense organs and controls body movements. IT is also where thoughts, plans, and learning abilities are processed. Folds and grooves on the outer surface of the cerebral cortex greatly increase its surface area.

What is the brain responsible for?

The control point of the CNS is the brain. Each of the major areas of the brain- the cerebrum, the cerebellum, and brain stem- are responsible for processing and relaying information

What is a neuron?

The messages carried by the nervous sytem are electrical signals called impulses. Nervous system impulses are transmitted by cells called neurons. Neurons can be classified into three types according to the direction in which an impulse travels. Sensory neurons carry impulses from the sense organs, such as the eyes and ears, to the spinal cord and brain. Motor neurons carry impulses from the brain and the spinal cord to muscles and glands. Inter neurons do the high-level work. They process information from sensory neurons and then send commands to other inter neurons or motor neurons -- a nerve cell, a specialized cell transmitting nerve impulses (electrical signals)

What is the overall function of the nervous system?

The nervous system collects information about the body's internal and external environment, processes that information, and responds to it.

What does the peripheral nervous system do? What does it contain?

The peripheral nervous system, which consists of nerves and supporting cells, collects information about the body's external and internal environment. THe nerves that are in your senses... PNS is under your voluntary control - the nerves that carry instructions from your brain to your limbs, for example.

What is a synapse?

The point at which a neuron transfers an impulse to another cell is called a synapse. When an impulse reaches the end of the axon of one neuron, neurotransmitters are released into the synaptic cleft. The neurotransmitters bind to receptors on the membrane of an adjacent cell.

Peripheral nervous system- What is the somatic nervous system. Give a specific ex

The somatic nervous system regulates body activities that are under conscious control, such as the movement of skeletal muscles. Most of the time you have control over skeletal muscle movement, but when your body is in danger the central nervous system may take over.

What is the function of the spinal cord?

The spinal cord is the main communication link between the brain and the rest of the body. Acts like a major telephone line, carries thousands of signals at once between the central and peripheral nervous systems. 31 pairs of spinal nerves branch out from the spinal cord, connecting the brain to different parts of the body. Certain kinds of information, including many reflexes, are processed directly in the spinal cord.

What is the function of the frontal lobe

evaluating consequences, making judgments, forming plans

What is the function of the temporal lobe?

hearing and smell

What is the cell body (part of the neuron)

the largest part of a typical neuron: contains the nucleus and much of the cytoplasm