large distances‚ semi-directional nature of referred pain & the latency of onset.2 This theory implies that if one receptive field is stimulated it will lead to the nervous system being unable to differentiate between the two areas due to synapsing at the same point at the dorsal horn (DH).1 The convergence theory is based on separate afferents converging from local and distant areas onto the same neuron in the spinal cord.2 Limitations to this theory is that the pain should be bi-directional & should
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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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lines the medullary cavity. | | | | B. is the unit of compact bone. | | | | C. contains red bone marrow. | | | | D. surrounds the bone surface. | | | | E. is the end of long bones. | | Feedback: Good job! | Question 2 of 32 | 3.0/ 3.0 Points | The site where bone growth occurs in a long bone is the | | | A. periosteum. | | | | B. epiphysis. | | | | C. epiphyseal plate. | | | | D. diaphysis. | | | | E. articular cartilage. | |
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Lab Report by from tables submitted by and and lab partners and Biology 112‚ Section original graph submitted April 2‚ 2013 Abstract: The effect of exercise/physical activity on pulse‚ blood pressure‚ and respiration rate was tested on biology students. The results of the experiment showed that each of these parameters is affected after engaging in 2 minutes of physical activity. We found that average pulse‚ mean arterial pressure‚ and respiratory rate were all higher in males than
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1. Sensation: the process by which sensory receptors and nervous system receive and represent stimulus energies from our environment 2. Perception: the process of organizing and interpreting sensory information‚ enabling us to recognize meaningful objects and events 3. Bottom-up Processing: analysis that begins with the sense receptors and works up to the brain’s integration of sensory information 4. Top- Down Processing: information processing guided by higher-level mental processes
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The sensory process begins as the ear senses the crack of the bat as it strikes the ball. The information received by the ear is received by the temporal lobe which alerts that an action has taken place which begins the transmission of neural messaging. Next‚ a dendrite at the receiving end of neuron cell will take the initial transmission and carry it forward to the body of the cell. Once the dendrite has received enough information the process will continue by undergoing a nerve impulse sending
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Neuro- is nerves and transmitter can send waves that carry a signal. In other words‚ a neurotransmitter is sort of like a mail man‚ although in this case instead of being called a mail man‚ it is called a chemical messenger. Like a mail man‚ a chemical messenger can transmit signals or codes from one neuron to another. And the way that this takes place is by synapses. There are two synapses that have two different names that are allowing these neurons to communicate or send messages to one another
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acetylsalicylic. Damaged and pain-causing cells produce large quantities of an enzyme called cyclooxygenase-2. This enzyme in turn produces a chemical called prostaglandin‚ which sends a message to the brain signaling that a specific part of the body is in pain. The chemical also causes the injured area to release fluid‚ causing it to swell or become inflamed. Aspirin adheres to the cylooxgenase-2 and prevents it from producing prostaglandin. As a result‚ some of the pain signals do not reach the brain
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Nervous System Differences according to: Motor neurons Sensory neurons Autonomic neurons Function Transmits impulses from the CNS which consists of the brain and spinal cord to muscles and glands elsewhere in the body Transmits impulses inwards from the sense organs to the CNS Located within the CNS‚ they transmit the electrical impulses generated by the stimuli to other nerves Structure Have Dendrites‚ Cell Body‚ Myelin Sheath‚ Node of Ranvier and Synaptic Knobs. The cell body is
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References: 1) Malamed SF: Handbook of Local Anaesthesia‚ ed 3‚ St Louis‚ 1990‚ Mosby – Year Book. 2) Chiu SY Ritchie JM: On the physiological role of internodal potassium channels and the security of conduction in myelinated nerve fibers‚ Proc R Soc Lond [Biol] 220:415-422‚ 1984. 3) Courtney KR‚ Strichartz GR: Structural elements which determine local
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