heart’s function. This idea was supported by Claudius Galen‚ who was the most influential physician of the Roman Empire. He pioneered the study of anatomy and based on animal observations and vivisection‚ was able to identify and describe cranial nerves. His research regarding human anatomy included three connected body systems: the brain‚ the heart‚ and the liver. Through dissection on animals he was able to make assumptions about human anatomy (some correct‚ others incorrect) which remained popular
Free Psychology
History of neuroscience From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search | It has been suggested that this article or section be merged with History of neurology. (Discuss) Proposed since December 2011. | See also: Neuroscience#History Early views on the function of the brain regarded it to be a form of "cranial stuffing" of sorts. In ancient Egypt‚ from the late Middle Kingdom onwards‚ in preparation for mummification‚ the brain was regularly removed‚ for it was the heart
Premium Neuroscience
Anatomy review for the nervous system - Week 12 Study Guide 1. Distinguish the difference between neuron‚ neuroglial cells‚ Schwann cells‚ neurofibrils‚ and astrocytes. Neuron: masses of nerve cells in nervous tissue Neuroglial Cells: provide neurons physiological requirements (fill spaces‚ give support to neurons) Schwann Cells: larger axons of peripheral neurons enclosed in sheaths Neurofibrils: thin‚ long fibrils that run through body of neuron and extends to axon and dendrites; gives neuron
Premium
(CNS) is the nerves in our brain and spinal chord. The peripheral nervous system (PNS) is a network of nerve cells in the rest of our body. -Our nervous system detects stimuli and allows us to react to them. -Stimulus: a change‚ action or occurrence in the environment that can cause an organism to respond. Eg. Light‚ noise‚ pressure… How do we detect stimuli? -We have sensory organs that detect particular stimuli eg. Skin What happens after we have detected a stimulus? 1. An impulse (electrical
Premium Eye Nervous system Neuron
part of a neuron that conducts impulses away from its cell body is called a(n) _______________. a) axon b) dendrite c) neurolemma d) Schwann cell 3. Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? a) mechanically gated channel b) voltage-gated channel c) leakage channel d) ligand-gated channel 4. An impulse from one nerve cell is communicated to another nerve cell via the __________. a)
Premium Nervous system Brain Neuron
voluntary time; the reason could be that when you had to hear the sound for the voluntary activation you had to process the sound than process kicking. This would take longer than automatically kicking with the involuntary activation. In the body an impulse nerve signal had to be sent to the object reacting in this case kicking your leg. 2. How does your reaction time to the voluntary action of your quadriceps compare with your reaction time to the simple reaction task in Project 2.2.3? The task in this
Premium Action potential Neuron Axon
January 30‚ 2014 Nervous Tissue ! Anatomy & Physiology - Overall Purpose of the Nervous System ! • To keep controlled conditions within limits that maintain life health and homeostasis ! - Regulates body activities by responding via nerve impulses‚ works with the endocrine system which responds by releasing hormones ! • Responsible for our behavior‚ memories‚ and movements ! • Neurology : branch of medicine that deals with normal functioning and disorders of the nervous system !
Premium Action potential Neuron
spinal cord‚ and nerves. These organs mostly consist of Nervous Tissues. http://www.nlm.nih.gov/medlineplus/ency/images/ency/fullsize/19588.jpg Nervous Tissues Nervous tissues are made up of two main types of cells: nerve cells/neurons and neuroglia. The main functions of nervous tissues are to react to stimuli and generate impulses to various organs in the body. http://www.occc.edu/deanderson/dennis-tutorial/dennis-jpeg/Nervous%20Tissue-low%20mag%20D-1%20copy Nerve cells and Neuroglia
Premium Brain Nervous system Central nervous system
initiated by sinoatrial node inside the heart itself‚ not by nerve impulses from the central nervous system. After exercise‚ the concentration of carbon dioxide in the blood is high‚ meaning that the pH in the blood is low. Chemoreceptors in the carotid arteries and aortic walls detect this change in pH. They increase the frequency of nerve impulses to the centre in the medulla oblongata. The centre increases the frequency of impulses via the sympathetic nervous
Premium Negative feedback Feedback Cybernetics
Brain 2. Spinal Cord B. Peripheral Nervous System (PNS) 1. Nerves to parts of the body 2. Nerves from parts of the body C. Functions 1. Sensory a. receptors for stimuli (receive stimulus) b. peripheral nerves (carry impulses to CNS) c. activities monitored 1) light intensity (visual) 2) sound intensity (auditory) 3) temperature 4) oxygen concentration 5) internal fluid conditions 2. Motor a. peripheral nerves (carry impulses from CNS) b. effectors (muscles & glands) 3. Integration
Premium Nervous system Neuron Action potential