STAAR Biology Category 1 Review

Flashcard
•
Biology
•
9th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are stem cells?
Back
Stem cells are undifferentiated cells that can turn into other types of cells.
2.
FLASHCARD QUESTION
Front
What is active transport?
Back
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.
3.
FLASHCARD QUESTION
Front
What is diffusion?
Back
Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.
4.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water across a selectively permeable membrane.
5.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is the process of spontaneous passive transport of molecules across a cell membrane via specific transmembrane integral proteins.
6.
FLASHCARD QUESTION
Front
What is the role of energy in active transport?
Back
Energy is required in active transport to move substances against their concentration gradient.
7.
FLASHCARD QUESTION
Front
What are the differences between passive and active transport?
Back
Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy and moves substances against their concentration gradient.
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