MA+Sense+HW

1) What is the function of a sensory receptor? Sensory receptors cause nerve impulses that are sent to the spinal cord and/or the brain. (2) What is a exteroceptor? EXAMPLES TOO. Exteroceptors are sensory receptors that detect stimuli from outside the body, such as those that result in taste, smell, vision, hearing, and equilibrium. Exteroceptors such as those in the eyes and ears are not directly involved in homeostasis and continually send messaged to the central nervous system regarding environmental condition. (3) What is an interoceptor? EXAMPLES TOO. An interoceptor receive stimuli from inside the body. For example, among interoceptors, pressoreceptors respond to changes in blood pressure, osmoreceptors detect changed in the water-salt balance, and chemoreceptors monitor the pH of the blood. (4) What is a chemoreceptor? EXAMPLES TOO. A chemoreceptor responds to chemilca substances in the immediate vicinity. For example chemoreceptors that monitor blood ph are in the arteries and aorta. (5) What is a pain receptor? EXAMPLES TOO. Pain receptors are a type of chemoreceptors. They respond to chemicals released by damaged tissues. They alert us of possible problems or dangers in our body. For example if we never felt the pain of appendicitis we wouldn't know to get help for it. (6) What is a photoreceptor? EXAMPLES TOO. Photoreceptor respond to light energy.Photoreceptors in our eyes give us vision. Photoreceptors called rod cells result in black and white vision and photoreceptors called cone cells result in color vision. (7) What is a mechanooreceptor? EXAMPLES TOO. Mechanoreceptors are stimulated by mechanical forces, which most often result in pressure of some sort. They are found in the inner ear, which helps us hear the pressure of noises so we can hear. It also helps us keep our balance. Pressoreceptors located in certain arteries detect changed in blood pressure, and stretch receptors in the lungs detect the degree of lung inflation. Proprioceptors, which respond to the stretching of muscle fibers, tendons, joints, and ligaments, make us aware of the position of out limbs. (8 What is a thermoreceptor? EXAMPLES TOO. Thermoreceptors located in the hypothalamus and skin are stimulated by changed in temp. Those that respond when temps. rise are called warmth receptors, and those that respond when temps lower are called cold receptors. (9) Explain sensation. Sensation is when the brain responds to nerve impulses. (10) What is sensory adaptation? A sensory adaptation is when you decrease in response to stimulus. For example when you enter a room with a bad smell but after sitting in the room for a long time you don't notice anymore. In this process some believe the brain stops sending nerve impulses to the brain.