Chapter 3 the cell Flashcards
Identify the function of a marker protein.
Allows for cellular identification
Identify the two types of molecules that form the majority of the plasma membrane.
proteins and phospholipids
Specificity
A transport protein will only bind to and transport a certain type of substance.
Saturation
Rate of movement of molecules across the membrane is limited by the available transport proteins.
Competition
Substances with similar shapes may bind to the same transport molecule.
The transmembrane proteins with pores without gates that allow ions to pass through the membrane are called ion
Leak channels
Identify functions of attachment proteins. They attach
cells to extracellular material
one cell to another cell
Transport proteins are Blank______ proteins.
integral
Ligand-regulated gates respond to
chemical signals
Identify the types of substances that require vesicles for transport across the cell membrane.
Non-lipid soluble molecules
Small pieces of matter
Large molecules
Diffusion, osmosis and facilitated diffusion are all examples of
active transport
Endocytosis is an example of
vesicular transport
Diffusion rate will increase as the size of the molecule
decreases
Oxygen levels in inhaled air in the lungs is much higher than oxygen levels in the capillary blood. Capillary blood has a much higher concentration of carbon dioxide than air in the lungs. Predict what will happen?
Oxygen will diffuse into the capillaries.
The measurement of a fluid’s resistance to flow is referred to as its
Blank 1: viscosity or fluidity
The amount of pressure exerted on one side of a selectively permeable membrane to stop osmosis is known as
?
Osmotic pressure
The sugar concentration in your glass of ice tea is very high at the bottom and low at the top. This concentration distribution is an example of a(n)
concentration gradient
Secondary active transport in the intestine works by
carrier mediated transport of sodium into the cell
carrier mediated transport of glucose into the cells
active transport of sodium out of the cell
Pinocytosis and phagocytosis are both forms of
endocytosis
The movement of solutes through a membrane by a carrier that uses a concentration gradient created by an active transport mechanism is called
secondary active transport
The cytoskeleton is composed of
actin (intermediate) filaments
microtubules
The cytoskeleton is composed of
actin (intermediate) filaments
microtubules
Which organelle is responsible for modifying and packaging newly synthesized proteins?
Golgi apparatus
What is a proteasome?
A barrel-like structure in the cell that breaks down and recycles proteins
Lysosomes form at the Blank______.
golgi ap
What is a centriole?
A small cylindrical organelle composed of microtubules
Extensions of the plasma membrane that serve primarily to increase a cell’s surface area are called
microvilli
what is a lysosome
An organelle that contains hydrolytic enzymes and functions in intracellular digestion
