Autonomic nervous system sympathetic, parasympathetic and enteric divisions It is further subdivided into the somatic nervous system (SNS) and the autonomic nervous system (ANS).Ī network of neurons that sends, receives and modulates neural impulses between different body parts. Peripheral nervous system (PNS) represents the conduit between the CNS and the body.Central nervous system (CNS) is the integration and command center of the body.The nervous system consists of two divisions Ultimately, the nervous system structures preside over everything that makes us human our consciousness, cognition, behaviour and memories. This property enables many important functions of the nervous system, such as regulation of vital body functions ( heartbeat, breathing, digestion), sensation and body movements. Use the same procedure to map cold receptors, using a blunt probe that has been sitting in ice water.The nervous system is a network of neurons whose main feature is to generate, modulate and transmit information between all the different parts of the human body. A map of the heat receptors should result. Touch each square individually, and when your partner expresses a sensation of heat, score that square on your grid. Y our partner should have his/her eyes closed. Temperature receptors: Explore the sensitivity of the squares marked on your partner’s hand by using a blunt probe that has been sitting in the heated water beaker. Label the stamp squares “heat,” “cold,” “pain,” and “touch.” 3. Using a 1 x 1 rubber stamp with a grid on it of raised squares 1mm apart, stamp the back of your partner’s hand, and stamp four similar squares in the space on the next page. Areas with large numbers of receptors are “sensitive ” those with widely separated ones are “less sensitive.” It is quite interesting to discover the mapping of these receptors in different regions of your skin! Exercise 1: Sensory Receptors 1. Refer to Figure 7.1 showing cutaneous sensory receptors. The receptors for these senses are in the integument, although pain receptors are more generally distributed. Sense Receptors The cutaneous senses include touch, pressure, heat, cold, and pain. Describe the functioning of the proprioceptors and their importance.Discuss these receptors in terms of thresh- old, “all-or-none” response, and adaptation. Name the five cutaneous sensations and explain how each is received by the skin. Explain that the cutaneous receptors are randomly distributed, and that their density varies in different parts of the body.Lecture topics associated with this lab : To be able to define threshold and all-or-none response.To understand the neural pathways for these sensations.To be able to define the term adaptation and relate it to the cutaneous senses.To be able to describe the distribution of cutaneous receptors for pain, touch, pressure, and temperature (heat and cold) in various body locations. To know the difference between an exteroceptor, interoceptor, and proprioceptor, and be able to give examples of each.To be able to define sensation and know the steps in our perception of a sensation.To be able to define a receptor and contrast it with an effector.
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