particular shape or pattern. This process is known as feature detection. Some cells are activated only by lines of particular width‚ shape‚ or orientation; while other cells are activated only by moving. Different parts of the brain process nerve impulses in several individual systems at the same time. Color vision is based on two processes or theories; trichromatic theory and the opponent-process theory. The trichromatic theory states there are 3 kinds of cones in the retina‚ to which each is
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"When a person glimpses the face of a famous actor‚ sniffs a favourite food or hears the voice of a friend‚ recognition is instant. Within a fraction of a second after the eyes‚ nose‚ ears‚ tongue or skin is stimulated‚ one knows the object is familiar and whether it is desirable or dangerous. How does such recognition‚ which psychologists call preattentive perception‚ happen so accurately and quickly‚ even when the stimuli are complex and the context in which they arise varies? Much is known about
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The twelve cranial nerves include the olfactory nerve‚ optic nerve‚ oculomotor nerve‚ trochlear nerve‚ trigeminal nerve‚ abducens nerve‚ facial nerve‚ vestibulocochlear nerve‚ glossyopharyngeal nerve‚ vagus nerve‚ accessory nerve‚ and the hypoglossal nerve. Each nerve functions as sensory‚ motor‚ or both sensory and motor. Moreover‚ both the optic nerve and the trigeminal nerve carry sensory information from the eyes to the brain (Marieb & Hoehn‚ 2014‚ p.495). Meanwhile‚ the nerves that carry motor
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information is sent to the soma‚ the neurons cell body‚ where it is combined with other information. Finally‚ the entire input is passed along within the axon in form of nerve impulses. It’s fascinating to learn that no neurons actually ever touch; they send messages across the synaptic gap‚ called neurotransmitters. Nerve impulses and transitive chemicals give our human behavior its complexity psychologists and scientists have been studying for ages. Our brain regulates our metabolism‚ temperature
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The Mechanics of Water The Science of Nutrition Perhaps you have heard the phrase “water is life”. When it comes to the human body‚ nothing could be more accurate. The system of fluids in the body that water affects controls everything from nerve impulse to movement; it is even part of the very structure of our bodies. The following will discuss the vital connection between different systems in the body and how they use water to maintain proper health and function. We will discuss what happens
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There are four major tissues in the human body. One of the major tissues is the epithelial issue that covers the surface of the body. It helps line the body cavities and organ cavities. There is no extracellular matrix between the cells that are located in the epithelial tissues because they are closely packed. The epithelial is also composed of one or more layers of packed cells. The other major tissue is the connective tissue‚ which is more diverse and abundant‚ compared to the other tissues
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react (withdrawal reflex from pain) 1 1/3/2013 Components of Reflex Arc 1. Receptor: site of stimulus 2. Sensory neuron: transmits afferent impulse to central nervous system (CNS) 3. Integration center: one or more synapses in CNS 4. Motor neuron: conducts efferent impulse to effector 5. Effector: muscle/glands respond to impulses Monosynaptic & Polysynaptic Spinal Reflex Arcs Spinal reflexes: initiated & completed at spinal cord level without involvement of higher brain centers
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neuromuscular irritability for conduction of nerve impulses‚ regulation of acid-base balance (through sodium bicarbonate and sodium phosphate)‚ participation in cellular chemical reactions and membrane transport. * Potassium: K+ 3.5-5.0 mmol/L: Potassium maintains the osmotic balance of the ICF space. Potassium is the major intracellular electrolyte and contributes to many important cellular functions including the transmission of nerve impulses. As the predominant ICF ion‚ it exerts a major
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Nervous systems consists of the central nervous system (brain and spinal cord) and the peripheral nervous system (cranial and spinal nerves) Brain is divided into 3 major areas 1. Cerebrum Pairs of lobes 2. Brain stem 3. Cerebellum Four lobes are: Frontal-largest lobe‚ concentration‚ abstract thought‚ information storage‚ memory and motor function‚ Broca’s area (motor control of speech)‚ affect‚ judgement‚ personality and inhibitions Parietal- sensory lobe‚ analyzes sensory information
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University of Phoenix Material Brain Structures and Functions Worksheet Below you will see two columns: Brain Structure and Function(s). Items listed under the column‚ “Brain Structure” will list a region of the brain‚ while items under the column titled “Function(s)” will describe the general behavior‚ skill‚ and/or activity of the associated brain structure. Fill in the blank for each of the statements below‚ either listing the brain structure responsible for the function described‚ or providing
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