Membrane structure
Diffusion/Osmosis
Active or Passive?
Membrane function
SURPRISE!
100
what is shown in the picture below:
A) chloroplast
B) mitochondrion
C) plasma membrane
D) replicated chromosome
C) plasma membrane
100
Someone sneezes and its particles spread across the classroom. What is this an example of?
diffusion
100
movement of molecules from low concentration to high concentration is called....?
active transport
100
what is the main job of the cell membrane?
control what substances are allowed into or out of the cell (acts like a gate)
100
The absorption of fluids by various cells of the human body is part of the life function known as
A) excretion
B) transport
C) respiration
D) growth
B) transport
200
What does structure X represent?
A) a protein
B) glucose
C) a lipid
D) glycogen
C) a lipid
200
Which molecule will most likely diffuse through a cell membrane?
A) starch
B) water
C) protein
D) DNA
B) water
200
The net flow of materials through the membrane of a cell against a concentration gradient is known as
A) active transport
B) passive transport
C) circulation
D) transpiration
A) active transport
200
what is the other name for energy?
ATP!!
300
what is one way larger molecules can be brought into the cell?
channel proteins
300
After a cookie has been digested, glucose molecules enter the bloodstream by the process of
A) phagocytosis
B) diffusion
C) ingestion
D) pinocytosis
B) diffusion
300
give an example of passive transport.
diffusion
osmosis
300
What cellular structure must oxygen cross to get from the outside to the inside of an animal cell?
A) The nucleus
B) The cytoplasm
C) The plasma membrane
D) The cell wall
C) The plasma membrane
300
what types of cells have a cell membrane?
ALL types
animal cells, plant cells
400
can you draw the cell membrane? (up close version)
400
The process of osmosis would explain the net movement of water into a cell if the percentage of
A) water was 90% inside the cell and 95% outside the cell
B) protein was 30% inside the cell and 35% outside the cell
C) water was 95% inside the cell and 90% outside the cell
D) water and protein was equal inside and outside the cell
A) water was 90% inside the cell and 95% outside the cell
400
Which would be the best evidence that a cell is using active transport to move a
substance across its cell membrane?
A) Substances are moving rapidly across the cell membrane.
B) ATP is being rapidly consumed near the cellular membrane.
C) Substances are moving from high to low concentrations.
D) Substances are moving through channels in the cell membrane.
B) ATP is being rapidly consumed near the cellular membrane.
500
Methods A and B are classified as methods of passive transport because they do not require
A) ATP
B) carbon dioxide
C) light
D) DNA
A) ATP