2.3.2 Active Transport
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- Q1
The movement of materials against a concentration difference is known as ________, and it requires energy.
active transport
30s - Q2
The active transport of small molecules or ions across a cell membrane is generally carried out by _________
transport protein
30s - Q3
Larger molecules and clumps of material can also be actively transported across the cell membrane by processes known as _____________ and exocytosis.
endocytosis
30s - Q4
Many cells use protein pumps to move _________________________ across cell membranes.
calcium, potassium, and sodium ions
30s - Q5
__________________________ can be transported by movements of the cell membrane known as bulk transport.
Larger molecules and even solid clumps of material
30s - Q6
_____________ is the process of taking material into the cell by means of infoldings, or pockets, of the cell membrane.
Endocytosis
30s - Q7
__________ is a type of endocytosis in which extensions of cytoplasm surround a particle and package it within a food vacuole.
phagocytosis
30s - Q8
Phagocytosis requires a considerable amount of energy and is considered a form of ______________.
active transport
30s - Q9
Many cells also release large amounts of material, a process known as ____________
exocytosis
30s - Q10
During exocytosis, the membrane of the ___________ surrounding the material fuses with the cell membrane, forcing the contents out of the cell.
vesicle or vacuole
30s