QUIZ 1 Flashcards
What is homeostasis?
The body adjusting metabolism in response to different environments
The four categories of lipids in cells are:
Free fatty acids, triglycerides, phospholipids, and steroids (cholesterol)
A protein is composed primarily of:
Amino acids
How do proteins differ in their function?
Structural and enzymatic functions
The three major components of cell membranes are:
Proteins, cholesterol, and phospholipids
Desmosomes
Local thickenings of adjacent cell membranes. Tightly bind adjacent cells.
Tight Junctions
Restrict water movement/dissolved material into the space inbetween cells.
Gap Junctions
Extend between adjacent cells and allow passage of small molecules or ions.
The process of phagocytosis is best described as:
The cell membrane wraps around a large particle and the particle is taken up into the cell
What is the primary difference between active transport and facilitated transport?
Active transport requires energy (ATP)
