Obtaining and Removing Materials
Flashcard
•
Science
•
6th - 8th Grade
•
Medium
Barbara White
Used 4+ times
FREE Resource
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40 questions
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1.
FLASHCARD QUESTION
Front
Homeostasis Noun
[hoh-mee-oh-stay-sis]
Back
Homeostasis
The maintenance of a stable, constant internal environment within a cell or organism despite external changes.
Example: This image uses a balanced scale as a simple metaphor for homeostasis, representing the body's ability to maintain a stable, balanced internal state.
2.
FLASHCARD QUESTION
Front
Cell Membrane Noun
[sel mem-brayn]
Back
Cell Membrane
The semipermeable barrier surrounding the cytoplasm of a cell, controlling the passage of substances into and out of it.
Example: This diagram shows the cell membrane is a barrier with special proteins, like channels, that control what moves into and out of the cell.
3.
FLASHCARD QUESTION
Front
Phospholipid Bilayer Noun
[fos-foh-lip-id by-lay-er]
Back
Phospholipid Bilayer
The fundamental double-layered structure of a cell membrane, composed of phospholipid molecules with hydrophilic heads and hydrophobic tails.
Example: This diagram shows the phospholipid bilayer is made of two layers, with water-loving (hydrophilic) heads facing out and water-fearing (hydrophobic) tails facing in.
4.
FLASHCARD QUESTION
Front
Phospholipid Noun
[fos-foh-lip-id]
Back
Phospholipid
A lipid molecule containing a hydrophilic phosphate head and two hydrophobic fatty acid tails, forming the basis of cell membranes.
Example: This image shows a phospholipid as one component of a cell membrane, where many phospholipids form a double layer called a bilayer.
5.
FLASHCARD QUESTION
Front
Hydrophobic Adjective
[hy-droh-foh-bik]
Back
Hydrophobic
The physical property of a molecule that is repelled from a mass of water, meaning it does not mix.
Example: This image shows water droplets beading up on a leaf's waxy surface. Because the surface is hydrophobic, it repels the water, preventing it from spreading.
6.
FLASHCARD QUESTION
Front
Selective Permeability Noun
[suh-lek-tiv per-mee-uh-bil-i-tee]
Back
Selective Permeability
The characteristic of a cell membrane that allows certain molecules or ions to pass through it while restricting others.
Example: This image shows a selectively permeable membrane that acts like a filter, allowing small particles to pass through its pores while blocking larger particles.
7.
FLASHCARD QUESTION
Front
Transport Proteins Noun
[trans-port proh-teenz]
Back
Transport Proteins
Membrane proteins that facilitate the movement of substances across the cell membrane, either passively or by using energy.
Example: This image shows how transport proteins, embedded in the cell's plasma membrane, act like gates to move specific molecules from outside to inside the cell.
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