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NAS2 Challenge Exam Questions and answers. 100% Accurate

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NAS2 Challenge Exam Questions and answers. 100% Accurate Purpose of Scientific Method - ✔✔-solve a problem or answer a question Question, Hypothesis, Experiment, Observe & Record, Analyze, Conclude - ✔✔-steps of scientific method Independent variable - ✔✔-a variable that stands alone and isn't changed by the other variables you are trying to measure, change or controlled example: age dependent variable - ✔✔-a variable dependent on other factors, tested or measured example: test score - factors that go into a score you receive on a test control group - ✔✔-does not receive treatment and used to compare or measure the other subjects experimental group - ✔✔-exposed to changes in independent variable anatomy - ✔✔-branch of science concerned with bodily structure of living organisms; structure physiology - ✔✔-science dealing with the functions of living things or their organs level of organization - ✔✔-living things arranged from the simplest to most complex are: organelle cells tissues organs organ systems, organism populations communities ecosystem biosphere requirements for life - ✔✔-Cellular organization Reproduction Metabolism Homeostasis Heredity Response to stimuli Growth and development Adaptation through evolution survival needs - ✔✔-Food, oxygen, water, body temperature, atmospheric pressure (oxygen/carbon dioxide exchange) homeostasis - ✔✔-relatively constant internal physical and chemical conditions that organisms maintain receptor - ✔✔-senses environmental stimulus and sends info to control center control center - ✔✔-hypothalamus signals effector effector - ✔✔-responds to stimuli example: muscle contracting negative feedback mechanisms - ✔✔-net effect is that the original output of the system shuts off the original stimulus or reduces the intensity homeostasis negative feedback mechanisms - ✔✔-most common form of homeostasis, bringing people back to normal functioning negative feedback mechanisms - ✔✔-example of homeostasis: adjustments of blood pressure, metabolism, body temp positive feedback mechanisms - ✔✔-form of homeostasis level of variable changes in same direction as initial change enhances or accelerates output created by activated stimulus positive feedback mechanisms - ✔✔-example of type of homeostasis: platelet aggregation or accumulation in response to injury, child birth anatomical position - ✔✔-erect position, face forward, arms at side, palms face forward used to describe relation to other things coronal, sagittal, transverse - ✔✔-3 major planes of dissection cranial - ✔✔-brain body region spinal/vertebral - ✔✔-spinal cord body region thoracic cavity - ✔✔-lungs, heart, esophagus, trachea, thymus abdominal cavity - ✔✔-stomach, liver, spleen, gallbladder, small/large intestines, kidneys pleural cavity - ✔✔-contains lungs pelvic cavity - ✔✔-end of large intestines, urinary bladder, reproductive organs mediastinum - ✔✔-seperates lungs pericardial - ✔✔-contains hear

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