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Biology 230 lecture exam 4 questions and answers
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Biology 230 lecture exam 4 questions and answers1a. Which ideas since Exam #3 have been most challenging for you? - Answer- Since Exam 3 the most challenging thing for me has been understanding the concentration in cells.
2a. In what ways have you changed your thinking about the ideas we have studied? - Answer- I now understand that the concentration depends on the tonicity of the cell.
3a. Which of the U- ABC-IT skills do you feel like you've really improved on so far this semester? - Answer- I feel I've really improved on asking questions by knowing my confusions and asking myself questions to figure it out.
1b. What are the three core concepts of biology that we have used to frame our studies together so far? - Answer- The previous core concepts of biology we have framed our studies on have been: Structure and function, information flow, and transformations of energy and mass.
2b. How would you explain to a fellow student what "Systems Biology" is about? - Answer- Systems biology is about the processes that go on in our body in order to maintain homeostasis.
3b. Why do you think it is important enough to be considered a core concept? - Answer-
I think it is important enough to be considered a core concept because this concept connects all of the previous concepts and is also how our body works.
4b. How would you explain why people other than human biologists should know this stuff? - Answer- People other than human biologist should know this because we are all
human and should know about our body systems
1c. Why is homeostasis important? - Answer- Homeostasis is important because this is the stable internal environment we must be in, in order to properly perform everyday functions. 2c. How does the body maintain homeostasis? - Answer- The body maintains homeostasis by using all systems in the body to have a part in maintaining homeostasis.
3c. What is a homeostatic set point? - Answer- The homeostatic set point is the goal of homeostasis to achieve a physiological set point which is the best stable internal environment for the body to function.
4c. Which organs are involved in water, and glucose balance? - Answer- The organs involved for water balance are the osmoreceptors in the hypothalamus of the brain and the kidneys, but osmosis in cells are also responsible for water balance. For glucose balance the organs responsible are the liver, muscles, and the pancreas.
5c. Where do different molecules enter your body? - Answer- Different molecules enter your body through your mouth and nose.
6c. How are molecules absorbed? - Answer- Molecules are absorbed in the villi and microvilli of the intestines.
7c. How do molecules get to other regions of the body? - Answer- Molecules transport through your body through capillaries then into arteries or veins in the blood.
8c. What are capillaries? - Answer- Capillaries are really small blood vessels that are the site of gas exchange with large surface area throughout your body.
9c. What is interstitial space? - Answer- Interstitial space is the fluid between all of your cells.
10c. How do different types of molecules (water, glucose, oxygen, sodium, chloride) cross cell membranes and travel between different organs? - Answer- Different molecules travel between different organs by going from one organ cell into the interstitial space into capillaries into the blood stream then into capillaries into the interstitial space and into another organ cell.
1d. How is water regulated in your body? - Answer- Water is regulated in your body by the sensor called the osmoreceptor in the hypothalamus that releases ADH to the kidney in order to make your thirsty and then in the body water is balanced through osmosis.
2d. What is osmosis and what does it have to do with water balance? - Answer- Osmosis is the process of water moving from a less concentrated area to a more concentrated area in order to create equilibrium which controls the balance of water and
salts through osmoregulation.
3d. Where does the water in your body come from? - Answer- The water in our body comes from liquids, food, and cellular respiration.
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