Guidelines: Answer the following critical thinking questions and others that may come to mind to focus students’ attention on the lesson content. Each response must be a minimum of 100 words. All responses must be typed . · 1. During beam attenuation, what occurs at the molecular level of anatomic tissues to affect the quantity and quality of the radiation exiting the patient? · 2. How does the composition of varying types of matter affect the electromagnetic radiations throughout the spectrum? · 3. How different do you think medicine would be today without medical imaging? · Why do we need units of measure in our daily lives? · 4. Clearly differentiate between photoelectric and Compton interactions and how they relate to absorption and scattering. .