The subtopic in the middle and four tasks round it: label a diagram, complete a table, put a process in order and fill 9 gaps. Every box rests on a learning objective of the topic in the AP Biology course and exam description. Type into the blanks and check them, or print it on A4, Letter or A3 with an answer key.
Paper
Each subtopic on a landscape page, as shuffled and chosen on screen.
Topic 2.8
Mechanisms of Transport
AP Biology ยท Unit 2 Cell Structure and Function
Hover over a box to see it. Untick it to leave it off this sheet and its printout.
Name
2.8.AMoving large things
Process
Direction
What happens
Example
out of the cell
a vesicle fuses with the plasma membrane and releases its contents
secreting insulin or neurotransmitters
into the cell
the membrane engulfs a large particle into a vesicle
a white blood cell eating a bacterium
Pinocytosis
into the cell
the membrane takes in droplets of
absorbing nutrients in solution
Receptor-mediated endocytosis
into the cell
receptors bind a specific ligand, then the membrane pinches in
uptake of cholesterol on LDL
2.8.AExocytosis
Number the steps in order.
The vesicle membrane fuses with the plasma membrane.
A protein is made and packaged into a vesicle.
The contents are released outside the cell.
The vesicle membrane becomes part of the plasma membrane.
The vesicle travels to the plasma membrane.
Topic 2.8Mechanisms of Transport
2.8.AMoving bulk across the membrane
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1
2
3
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2.8.AMembranes keep their balance
Vesicles are made of the same bilayer as the membrane they come from, so endocytosis removes membrane from the cell surface and exocytosis it back. A cell that carries on both at the same rate keeps its surface area constant. All of these processes require , and the fusion of membranes depends on the fluid nature of the bilayer.
Word bankaddsendocytosisenergyExocytosisexocytosisfluidPhagocytosisreceptor-mediated endocytosisvesicle
Answer key
Every box on the sheet with its gaps filled in, as the subtopic reads in full.
LabelMoving bulk across the membrane
vesicle
exocytosis
endocytosis
receptor-mediated endocytosis
TableMoving large things
Process
Direction
What happens
Example
Exocytosis
out of the cell
a vesicle fuses with the plasma membrane and releases its contents
secreting insulin or neurotransmitters
Phagocytosis
into the cell
the membrane engulfs a large particle into a vesicle
a white blood cell eating a bacterium
Pinocytosis
into the cell
the membrane takes in droplets of fluid
absorbing nutrients in solution
Receptor-mediated endocytosis
into the cell
receptors bind a specific ligand, then the membrane pinches in
uptake of cholesterol on LDL
OrderExocytosis
A protein is made and packaged into a vesicle.
The vesicle travels to the plasma membrane.
The vesicle membrane fuses with the plasma membrane.
The contents are released outside the cell.
The vesicle membrane becomes part of the plasma membrane.
GapsMembranes keep their balance
Vesicles are made of the same bilayer as the membrane they come from, so endocytosis removes membrane from the cell surface and exocytosis adds it back. A cell that carries on both at the same rate keeps its surface area constant. All of these processes require energy, and the fusion of membranes depends on the fluid nature of the bilayer.
Biology by Bradford