PHYL141 Physiology Exam #1

Compare and contrast pos and neg feedback system; give example of each - ANSWER-Positive feedback system: the output enhances/amplifies the stimulus; example: childbirth - oxytocin is released to stimulate contractions. this release results in intensified contractions and continues to do so until baby is delivered Negative feedback system: the output decreases/inhibits the stimulus; example: thermoregulation - when you get too hot, your body temperature rises, thus a cooling mechanisms such as sweating is triggered, bringing your body temperature back down. same with if your body is too cold, your body temperature drops, thus a heating mechanism such as shivering is triggered, bring your body temperature up. A 75 yo smoker has bladder cancer. A radiography technician needs to position the X-ray tube head over the __ region - ANSWER-Hypogastric A plane that separates the body into unequal right and lef sides is a __ plane - ANSWER-Parasagittal A(n) __ s a subjective change in body function, such as headache or nausea. A(n) __ is objective and can be observe and measured such as body temperature or blood pressure and s