A substance which resists changes in the pH of a solution is known as

Channel-mediated diffusion is a subtype of:

Define the term homeostasis. List THREE components of homeostatic control mechanism. Give one example of a process regulated through homeostasis. (4 pts.)

What is the main difference between passive and active transport? List and define TWO types of passive transport. List and define ONE type of active transport. (4 pts.)

Covalent bond is formed when atoms share electrons.

An economic decision tree will include all of the following except

The replication of the DNA molecule during interphase occurs during the

The above picture shows skin. Which number indicates the reticular layer of the dermis?  

Normally, skin color results from a combination of: a: melanin b: hemoglobin c: bilirubin d: carotene 

Extra Credit: List FOUR functions of proteins within the body. Give an example of TWO of those functions. (4 pts.)