Test 1 Anatomy & Physiology - Chapters 1-4 Questions with Correct Answers

Anatomy definition - Correct Answer studies the structure of body parts and their relationships to one another Physiology definition - Correct Answer concerns the function of the body, how the body parts work and carry out their life sustaining activities positive feedback mechanism - Correct Answer result or response enhances the original stimulus so that the response is accelerated. moves in the same direction as the initial change. usually control infrequent events that do not require continuous adjustments. +feedback mechanisms are often referred to as cascades. examples: blood clotting, birth negative feedback mechanism - Correct Answer causes the variable to change in the opposite direction to that of the initial change, returning it to its "ideal" value the endocrine system is important in maintaining homeostasis. a good example of a hormonal negative feedback mechanism is the control of blood sugar by insulin. As blood sugar rises, receptors sense the change and the pancreas (control center) secretes insulin into the blood goal of neg. feedback system: prevent severe changes within the body examples: heart rate, blood pressure, rate and depth of breathing, blood levels of Oxygen, carbon dioxide and minerals regional terms - Correct Answer must know: refer to other quizlet: Regional Terms Anatomy anatomical positon - Correct Answer body is erect with feet slightly apart, films face forward and thumbs point away directional terms - Correct Answer help us explain where one body part is in relation to another