1. Your text, Chapter 5.
2. The Homeostasis Workshop (also linked in "Workshops" in the project briefcase)
a. Define homeostasis
It is the maintainenance of relatively stable internal environments regardless of the external environment.
b. What is the purpose of insulin?
Insulin acts like a key to allow glucose to flow out of the bloodstream and into the body cells. Insulin is produced in the pancreas.
c. What is meant by negative feedback?
Negative feedback tells the body when conditions are not at normal levels and need to be improved.
d. How do the different systems work together to regulate blood sugar?
The circulatory system transports glucose and insulin. The digestive system absorbs glucose and other organic compounds. The liver absorbs glucose and stores it as glycogen as reserve energy supply. Muscles use glucose for energy. It uses glucose in cellular respiration.
3. The Transpor t Workshop (also linked in "Workshops" in the project briefcase)
a. What is active transport?
The pumping of molecules against their concentration gradient with the expenditure of energy (ATP).
b. What is an ion pump?
Special protein which actively transport ions resulting in an ionic and voltage gradient.
c. What is cotransport?
The coupled passage of two materials across a membrane.
d. What is endocytosis? Phagocytosis? Pinocytosis?
endocystosis- import of materials to the cell by infoldings of the plasma membrane
phagocytosis- cell eating
pinocytosis- cell drinking
e. Infer what is exocytosis?
exocytosis- export of materials out of the cells
f. What is passive transport?
Passive transport is the movement of molecules across the cell that does not require energy (ATP).
g. Distinguish between simple diffusion, facilitated diffusion, and osmosis.
simple diffusion- movement of molecules from high to low concentration
facillitated diffusion- passive transport with the aid of special transport proteins
osmosis- specifically water molecules transporting from areas of high concentration to areas of low concentration
h. Why are transport mechanisms important to all living things?
It is important to maintain a balance of molecules in cells otherwise the cells could dehydrate and die.
i. Why is homeostasis important to life?
It keeps our bodies balanced at normal conditions. Without homeostasis we could die from the simplest of things.
j. How can you use this information in your final product?
We can use this information to show how being healthy can help maintain homeostasis.
2. The Homeostasis Workshop (also linked in "Workshops" in the project briefcase)
a. Define homeostasis
It is the maintainenance of relatively stable internal environments regardless of the external environment.
b. What is the purpose of insulin?
Insulin acts like a key to allow glucose to flow out of the bloodstream and into the body cells. Insulin is produced in the pancreas.
c. What is meant by negative feedback?
Negative feedback tells the body when conditions are not at normal levels and need to be improved.
d. How do the different systems work together to regulate blood sugar?
The circulatory system transports glucose and insulin. The digestive system absorbs glucose and other organic compounds. The liver absorbs glucose and stores it as glycogen as reserve energy supply. Muscles use glucose for energy. It uses glucose in cellular respiration.
3. The Transpor t Workshop (also linked in "Workshops" in the project briefcase)
a. What is active transport?
The pumping of molecules against their concentration gradient with the expenditure of energy (ATP).
b. What is an ion pump?
Special protein which actively transport ions resulting in an ionic and voltage gradient.
c. What is cotransport?
The coupled passage of two materials across a membrane.
d. What is endocytosis? Phagocytosis? Pinocytosis?
endocystosis- import of materials to the cell by infoldings of the plasma membrane
phagocytosis- cell eating
pinocytosis- cell drinking
e. Infer what is exocytosis?
exocytosis- export of materials out of the cells
f. What is passive transport?
Passive transport is the movement of molecules across the cell that does not require energy (ATP).
g. Distinguish between simple diffusion, facilitated diffusion, and osmosis.
simple diffusion- movement of molecules from high to low concentration
facillitated diffusion- passive transport with the aid of special transport proteins
osmosis- specifically water molecules transporting from areas of high concentration to areas of low concentration
h. Why are transport mechanisms important to all living things?
It is important to maintain a balance of molecules in cells otherwise the cells could dehydrate and die.
i. Why is homeostasis important to life?
It keeps our bodies balanced at normal conditions. Without homeostasis we could die from the simplest of things.
j. How can you use this information in your final product?
We can use this information to show how being healthy can help maintain homeostasis.