Homeostasis
What is homeostasis?
An organism ability to maintain a stable internal environment
What is the energy molecule?
ATP
Adenosine Triphosphate
Enzymes _________ reactions in the cells.
A. Slow down
B. Speed Up
C. Keep the same speed in
B. What is speed up?
An enzyme will ____________ the amount of activation energy required.
A. What is reduce?
B. What is increase?
C. Keep the same
A. What is reduce?
What is the purpose of the digestive system?
To break food down into nutrients. Absorb the nutrients.
Give an example of the body maintaining homeostasis
Temperature Regulation (shivering, sweating)
Blood sugar regulation
Oxygen and Carbon Dioxide Regulation
Water Salt Regulation
The molecule needed to be EATEN to create energy
What is glucose? (Sugar)
This is the enzyme that breaks down Lactose.
What is Lactase?
Enzymes are this type of macromolecule.
What is proteins?
In which organ does the majority of nutrient absorption occur.
Small intestine
What could happen when homeostasis is disrupted?
Possible illness, disease or death
What is metabolism?
All of the chemical reactions of the body
What happens to an enzyme when the reaction is complete?
The enzyme is reusable.
What is the name of the area that the specific substrate fits into on the enzyme.
What is an active site?
What is the difference between chemical and mechanical digestion?
Chemical digestion- breaking food down using chemical reactions. Using enzymes in the stomach, mouth, and intestines.
Mechanical digestion- breaking food down physically. Not using chemicals. Teeth breaking down food and the stomach churning (mixing) food are examples.
List the two types of feedback loops
What is Positive and Negative Feedback
Give an example of a metabolic process?
Digestion
Cellular Respiration
Photosynthesis
After the reaction, the enzyme is _________.
(What happens to the enzyme after the reaction?)
What is it is reusable?
Enzymes are specific. What does this means?
What is Enzymes only react with specific substrates that fit into the active site (Lock and key model)
What is the purpose of the large intestine?
To absorb excess water and create waste products for excretion.
Give an example of a positive and a negative feedback mechanism
Negative: Temperature Regulation, Blood Glucose Regulation (other answers are acceptable)
Positive: Childbirth
What are the two types of metabolic processes?
Catabolism: Breaking thing down and releasing energy (Digestion)
Anabolism: Breaking something down and using energy. (Synthesis)
Enzymes lowers activation energy and speeds the reaction up. Another word for this is a ____________.
What is catalyst?
What three things do an enzyme need to function?
Optimal Temperature
Optimal pH
Optimal amount of substrates
Describe the path of food through the digestive system. Where does the digestive system start to where it ends. Describe the role of each organ in the pathway.
Mouth- breaks down food chemically and mechanically
Esophagus- moves food to the stomach
Stomach- digests food chemically and mechanically
Small intestines- absorb nutrients into the blood stream
Large intestines- absorb water and create waste