Phenomenon #1 Part 1
Throughout our study of the marathon runner phenomenon we studied how some molecules that are essential for life move through our bodies and into and out of our cells and how multiple body systems are required to make this happen. Which of the following would best describe how 2 or more of your body systems work together?
Glucose enters our digestive system when we eat. It moves through our stomach to our small intestines when it is absorbed into our blood stream. From here, our circulatory system takes it to our body cells where it can be used for cellular respiration. In fact, our circulatory also moves oxygen to cells and helps regulate water levels in our body too.
Passive Transport is defined as molecules moving from __________ to _________ concentration, down the concentration gradient.
High to Low
Which term best describes the self-regulating process the body uses to maintain stability and balance?
Homeostasis
Which type of solution are Frank's cells sitting in when it is in the freshwater fishbowl?
Isotonic solution
In which organ of the excretory system do we filter our blood and exchange salts and water?
Kidneys
In what cell part does aerobic cellular respiration take place?
Mitochondria
Which of the following students best explains why this graph is an example of a negative feedback loop?
Mya: About ½ hour after each meal, the blood glucose levels rise to about 7mmol/l, but then they drop back down to a set point. They never drop down to 0, this shows that there is a narrow range that is ideal for blood sugar levels.
What are the two inputs for aerobic cellular respiration?
Oxygen and Glucose
If a blood vessel is damaged, chemicals begin a chain reaction that causes platelets to stick to the vessel wall. The platelets release more chemicals that accelerate the clotting process. This process ends once the vessel wall has been repaired by a clot.
Positive Feedback Loop
The harder you exercise the harder your heart pumps to move oxygen to your muscles. Which 2 body systems are responsible for getting oxygen from the air into your body cells?
Respiratory and Circulatory System
Which of the following systems does not play a role in maintaining your blood sugar levels?
Skeletal System
What 2 components make up a solution?
Solute and Solvent
What is one reason that a cell needs to regulate flow across the membrane?
The cell needs to maintain homeostasis
Which of the following best describes what would happen to Frank the fish if you moved him to the ocean?
The fish cells will shrivel, and the fish will die because in the ocean, the cells will be sitting in a hypertonic solution and that will cause water to move out of the cells.
What is the job of a cell membrane?
To control what can go into and out of the cell
Which of the following best defines hyponatremia?
When a person's body holds onto too much water. This dilutes the amount of sodium in the blood and causes water to move into cells.
Which of the following best explains why this is an example of a negative feedback loop?
When sugar levels drop below or rise above the set point, we have mechanisms in place to bring the sugar levels back to a set point.
Choose ALL the following that are examples of our body using a negative feedback loop to help maintain homeostasis. (you can select more than 1)
a. Regulating blood/glucose levels b. Regulating our plasma/sodium levels d. Regulating our blood clotting with platelets e. Regulating our internal temperatures
What does active transport require to move the molecules in the correct direction?
ATP
Which of the following BEST describes the differences between aerobic and anaerobic respiration?
Aerobic respiration uses oxygen and makes lots of ATP while anaerobic doesn't use oxygen and releases lactic acid
In the following diagram, the resting heart rate is 60 BPM and the dancing heart rate is 120BPM. If this were a positive feedback loop, what would you expect the heart rate to do?
Drop back down to 100 BPM
