Function of Receptors and Reflex Action PDF

Function of the receptors ? 37 1. Starting Point in all body reflexes. 2. Organ of Perception of data about changes in external or internal environment.. 3...

Function of the receptors ? 37 1. Starting Point in all body reflexes. 2. Organ of Perception of data about changes in external or internal environment.. 3 Sending information , accumulation in CNS. 4 - Lowering the threshold of the axon for some kinds of stimuli Explain in detail the reflex action ? 53 - 52 It is functional unit of the nervous system and involuntary response started by a change in the surrounding environment (external or internal) which acts as a stimulus (external or internal ( stimulating one of the receptors. This leads to initiation of nerve impulse which Passes through Chain of sensory neurons to CNs. Tabulate the functions of Medulla Oblongata ? 19 1- involved in the voluntary movements. 2 Contains Vital Centers : These Vital Centers are : cardiac centers : are CAC and CIC regulate HR. RespiratoryCenters :Inspiratoryandexpiratory centersregulaterespiratory actition. 3 The medulla has Non-vital centers for Swallowing Vomiting : , , Sneezing. Coughing. Describe the characteristics features of three types of muscle ? 28 Function of skeletal muscle ? 34 1- Motion : attached to bones and hence responsible voluntary body movement. 2 Maintenance of Posture Co-ordination of joint movement to maintain the body in either standing sitting. : ,. 3 Heat production and glycogen storage site. Compare between sympathetic and parasympathetic ? 1 1. Il I ParaSympathetic Sympathetic blood vessels Constricted pupil Dilates pupil Smpathetic - Constrict Stimulates flow of Saliva nhibits flow of Saliva - Parasmpathetic Dilation Slows heartbeat Accelerates heartbeat Constricts bronchi Dilates bronchi Stimulates peristalsis ad Secretion Inhibits peristalsis and Secretion of bile Conversion of glycogen tolease Stimulaterselease inhibits bladder Contraction  Function of smooth muscle ? 35 - Regulates the flow of blood in the arteries. - Moves the food along through the gastrointestinal tract. - Expels urine from the urinary bladder. - Regulates theFlow of air through the lungs. · Send the babies out into the World from the Uterus Outerine Contraction)