Positive & Negative Feedback Loops
The maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation.
What is Homeostasis
This is how oxygen, nutrients, and glucose move around the body.
What is circulatory system? What is Blood?
The respiratory and cardiovascular systems work together to control the levels of these two gases.
What are Oxygen and Carbon Dioxide?
This organ uses wave-like muscular contractions (peristalsis) to move food from the mouth to the stomach.
What is the esophagus?
This is the name for the “master control” mechanism, such as when high blood sugar causes the release of insulin to bring it back down.
What are the kidneys?
This type of feedback loop acts to reverse a change in a controlled condition, bringing the system closer to a target set point.
What is a Negative Feedback Loop?
These blood cells transport gases like oxygen and carbon dioxide
What are Red Blood Cells?
These tiny air sacs in the lungs are where gas exchange happens.
What are alveoli?
This enzyme, found in saliva, begins the breakdown of carbohydrates in the mouth.
What is amylase?
This is the microscopic functional unit of the kidney, with over 1 million contained in each kidney.
This type of feedback loop amplifies or reinforces a change, moving the system away from a target set point.
What is a Positive Feedback Loop?
These cell fragments help blood clot to prevent too much blood loss.
What are platelets?
The alveoli are surrounded by these tiny blood vessels. These vessels allow gas exchange between the lungs and the blood.
What are capillaries?
This organ produces a cocktail of enzymes (lipase, amylase, trypsin) and releases them into the small intestine.
What is the pancreas?
This is the correct anatomical sequence of urine flow: Kidneys, Ureters, ______, Urethra.
What is the bladder?
These are the three main components of a feedback loop, in order.
What are Receptor, Control Center, and Effector?
Arteries carry blood this direction, and it is oxygen-rich.
What is away from the heart?
Oxygen and carbon dioxide move between the alveoli and blood by this process.
What is diffusion?
This structure in the small intestine increases surface area to maximize nutrient absorption into the blood.
What are villi?
The internal ___________ prevents the bladder from emptying until the pressure within is increased to a certain level.
What is sphincter?
While most homeostatic mechanisms are negative, these two major human processes rely on positive feedback loops.
What are Childbirth and Blood Clotting?
These small vessels connect arteries and veins and allow exchange of gases and nutrients.
What are capillaries?
Discussion based: Explain to me how gas exchange happens.
Need to include alveoli, capillaries, CO2, O2, diffusion
This is the name for the “master control” mechanism, such as when high blood sugar causes the release of insulin to bring it back down.
What is a negative feedback loop?
Discussion based: How does the urinary system help maintain homeostasis?
Removes waste, controls water and salts, keeps balance