Stimuli Light Sound Chemical in air Chemical in foods Pressure‚ heat‚ cold‚ touch yschow@smkbpj(a) 3 Pathway from stimulus to response. Stimulus Response Receptor in sensory organ Effectors (muscle) Sensory nerves Brain yschow@smkbpj(a) Motor nerves 4 1.2 Sense of Touch yschow@smkbpj(a) 5 1.2 Sense of Touch • The skin is a sensory organ which responds to the sense of touch. • There are five types of receptors in the skin. Receptor Cold receptors Heat receptors
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the brain and spinal cord‚ with the main functions being processing information and determining responses and the peripheral nervous systems which is made up of all sensory‚ motor and inter neurons within the body and these are located on peripheral nerves. All of them work together to collect sensory data and also control the actions of the body. Sensory neurons collect sensory information and convey it to the brain‚ and motor neurons transmit the necessary signals to receptive tissues whilst inter
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1) What is the role of calcium ions during contraction of a skeletal muscle? Calcium is an important element for live. Calcium is found in the bones of animals and humans. In muscle contraction is produce as a result of Calcium ions ‚ Ca2+‚ It comes from rapid release from the cisternae of the sarcoplasmic reticulum which cause a chemical reaction between ATP and the myofilaments. Another important function of Calcium ions occurs during the state of resting muscle. During the state of resting
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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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about 100 billion 2. What is a neuron? It is a nerve cell that sends and receives electrical signals over long distances within the body 2b. be able to label its parts. Parts of a neuron. A neuron has three basic parts‚ the cell body‚ the axon‚ and the dendrites. A thin nerve membrane surrounds the entire cell 3. How fast do neurons travel? Neurons don’t travel‚ the impulses they transmit do. As a simple analogy‚ a neuron is like an electric
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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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Chapter 2 Outline The Biological Perspective Neuron A specialized cell transmitting nerve impulses; a nerve cell Dendrites Dendrites are treelike extensions at the beginning of a neuron that help increase the surface area of the cell body and are covered with synapses Soma The soma is the cell body of a neuron. Axon The Axon of a neuron is a singular fiber that carries information away from the soma to the synaptic sites of other neurons (dendrites and somas)‚ muscles‚ Glial
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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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