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Chapter 10
Ch. 10 highlighted info- Mrs. Neutzlings Class
| Question | Answer |
|---|---|
| There are more than__ ____ nerve cells | 100 billion |
| The nervous system is classified into 2 major divisions, which are? | Central Nervous System (CNS) & the Peripheral Nervous System (PNS) |
| The CNS consists of the ___ & ___ ____ | Brain & Spinal Cord |
| The PNS consists of? | Spinal Nerves, Cranial nerves, plexuses & peripheral nerves throughout the body. |
| In addition to the spinal & cranial nerves the PNS also contains a large group of nerves that function involuntarily or automatically, w/out conscious control. These nerves belong to the? | Autonomic Nervous System (ANS) |
| Some of the autonomic nerves are ____ nerves and others are ______ nerves | Sympathetic, Parasympathetic |
| The _____ nerves stimulate the body in times of stress & crisis | Sympathetic |
| The¬¬¬ _____nerves normally act as a balance 4 the sympathetic nerves | Parasympathetic |
| A ____ is a large network of nerves in the PNS. | Plexus |
| A ____ is an individual nerve cell | Neuron |
| A ____ begins an impulse in the branching fibers of the neuron, which are called? | Stimulus, Dendrites |
| Axons can be covered with a fatty tissue called? | Myelin Sheath |
| The ____ ____ gives a white appearance to the nerve fiber- hence the term white matter, as in parts of the spinal cord and the white matter of the brain and most peripheral nerves. | Myelin Sheath |
| NOTE: | The gray matter of the brain and spinal cord is composed of the cell bodies of neurons that appear gray because they are not covered by the myelin sheath |
| The space where the nervous impulse jumps from one neuron to another is called? | Synapse |
| The transfer of the impulse across the synapse depends on the release of a chemical substance called a? | Neurotransmitter |
| Example of Neurotransmitter is? | Acetylcholine |
| Peripheral nerves that carry impulses to the brain and spinal cord from stimulus receptors is called? | Sensory Nerves |
| Examples of sensory nerves | Skin, eye, ear, and nose |
| Peripheral nerves that carry impulses from the CNS to organs that produce responses are? | Motor Nerves |
| Examples of Motor nerves are? | Muscles & glands |
| There are 4 types of Glia (neuroglia) cells. They are? | Astrocytes (astroglial cells) Microglial cells, Oligodendroglial Cells, Ependymal cells |
| ? cells are supportive & connective in function | Neuroglial |
| The ---- controls body activities, it weighs about 3 lbs in adults and has many different parts, all of which control different aspects of body functions. | Brain |
| The largest part of the brain is the thinking area or ________ | Cerebrum |
| On the surface of the brain | Cerebral Cortex |
| Folds are called | Gyri |
| Grooves are known as? | Sulci |
| The brain is divided in ½ a rt side & left side which are called? | Cerebral Hemispheres |
| In the middle of the cerebrum, there are spaces, or canals called | Ventricles |
| Ventricles contain a watery fluid that flows throughout the brain and around the spinal cord. The fluid is called? | Cerebrospinal Fluid (CSF) |
| Pons & medulla are part of the? | Brainstem |
| Cerebellum is located? | Beneath the posterior part of the cerebrum |
| Nerves tracts cross from right left and left to right in the _____ _____. | Medulla Oblongata |
| The medulla oblongata contains 3 important vital centers that regulate internal activities of the body | Respiratory Center, Cardiac Center & Vasomotor Center |
| Affects (constricts or dilates) the muscles in the walls of blood vessels | Contains the center |
Created by:
jdunn
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