Stimulus Force (gf)(Motor neuron 1) 100 mV 0 200 mV 0 Voltage (mV) 300 mV 0 400 mV 0.102 500 mV 0.102 Effect of Stimulation Value on Twitch Contraction Force 1. What is the threshold stimulus? The minimal voltage that induces an action potential 2. What is the maximum force generated at the threshold stimulus? 0.102 3. How does increasing voltage above threshold stimulus affect force development? undefined Table 5: Muscle Length and Contraction Force Force( gf )( Motor neuron 1) Trial 1 Trial 2
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Define phrenology. How did phrenology suggest the modern-day idea of LOCALIZATION OF FUNCTION Phrenology-the detailed study of the shape and size of the cranium as a supposed indication of character and mental abilities. Phrenology is a process that involves observing and/or feeling the skull to determine an individual’s psychological attributes. The idea that different parts of the brain do different things is called localization of function. Phrenology could have been used to feel the bumps on
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Nervous tissue This tissue is found in the spinal cord‚ the brain and the nervous. The nervous tissue is seen as the ‘brain’ of the tissues as it is responsible for all informational functions. The nervous tissue contains neurons‚ and these neurons can never divide therefore can never be replaced if/ when they die. The functions of the nervous tissue are to receive nutrients from our blood‚ however it is protected in a shell so cannot receive all of the nutrients.
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The nervous system possesses three main cell types‚ one of which being the neurons. These are formed of different elements‚ the axon‚ cell body and dendrites. Axons play an important part in the fast reaction for survival. The wider the axon‚ the faster it will conduct the action potentials. For example‚ the squid carries a particular neuron involved in the escape response from danger. The axon from this specific neuron has quite a wide diameter‚ which makes it conduct action potentials faster.
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in inflamed or degenerating brain tissue. 5. Oligodendrocytes form myelin sheaths around nerve fibers in the CNS. 6. Nerve fibers with many Schwann cells forming a thick myelin sheath are called myelinated fibers‚ or gray fibers. 8. Most of the neurons in the brain and spinal cord are unipolar. 9. In a contralateral reflex arc‚ the receptors and effectors are located on opposite sides of the body. 10. In an ipsilateral arc‚ the effectors and receptors are on opposite sides of the body. 11. Groups
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sensory neurons running from stimulus receptors that inform the CNS of the stimuli and the motor neurons running from the CNS to the muscles and glands - called effectors - that take action. The PNS also consists of the Autonomic Nervous System which includes the sympathetic and parasympathetic. Also included with the PNS is the Somatic Nervous System. The body communicates internally through Neurons and Neural Pathways. Neurons consist of dendrites that receive information from the Neuron‚ Axons
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but it also controls the body’s voluntary movements as well. These movements include posture‚ balance‚ speech‚ and coordination. When compared to the size of the cerebrum it is much smaller in weight‚ but it contains about half of the brain’s total neurons. With this high volume of sensory cells‚ it is known that this organ is vital to all of the movements that one needs to make. If damage is done to the cerebellum‚ one would not become paralyzed or their intellect compromised‚ but their motor functions
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Nervous System Baby’s Brain and Nerves • A baby’s brain reaches three-fourths of its adult weight and size by age 2! • Babies are born with somewhere in the neighborhood of 100 and 200 BILLION neurons. • A complex network of neurons will grow rapidly during the first few years of life. • The neurons grow and become coated with myelin‚ which is
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Neurological Processes PSY/340 Neurological Processes Every animal has a brain‚ but humans have a more complex and unique brain in terms of giving individuals the power to think‚ plan‚ speak‚ act‚ and behave. It is an extremely complex organ that consists of many areas that all work together in unison in order for the body to perform the tasks it is told to perform. The brain is responsible for controlling both voluntary and involuntary actions and coordinates and controls other organs in the
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What is psychology? The scientific study of behaviour and the physiological and mental processes that underlie such behaviour. A profession that applies the findings of psychological research to real world problems Wilhelm Wundt First psychology lab in 1879 Main focus was on consciousness Many students established research labs in North America and Germany. G. Stanley Hall Student of Wundt for a brief time Growth of psychology in North America Structuralism Edward TitchenerTo identify
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