Active and Passive Transport
Flashcard
•
Science
•
6th - 8th Grade
•
Easy
Barbara White
Used 1+ times
FREE Resource
Student preview
23 questions
Show all answers
1.
FLASHCARD QUESTION
Front
Homeostasis Noun
[hoh-mee-oh-stay-sis]
Back
Homeostasis
The process of maintaining a stable internal environment inside a cell or an entire organism.
Example: This diagram shows how red blood cells transport oxygen from the lungs to body cells, a key process for maintaining a stable internal environment (homeostasis).
2.
FLASHCARD QUESTION
Front
Cell Membrane Noun
[sel mem-breyn]
Back
Cell Membrane
The biological barrier that separates the interior of all cells from the outside environment and controls the passage of substances.
Example: This image shows the cell membrane using energy (ATP) to actively transport molecules from an area of low concentration to an area of high concentration.
3.
FLASHCARD QUESTION
Front
Selectively Permeable Adjective
[suh-lek-tiv-lee pur-mee-uh-buhl]
Back
Selectively Permeable
A property of membranes that allows only certain molecules or ions to pass through it by means of active or passive transport.
Example: A selectively permeable membrane acts like a filter, allowing small water molecules to pass through but blocking larger solute particles.
4.
FLASHCARD QUESTION
Front
Phospholipid Bilayer Noun
[fos-foh-lip-id bahy-ley-er]
Back
Phospholipid Bilayer
The two-layered arrangement of phosphate and lipid molecules that form a cell membrane.
Example: A cell membrane is a phospholipid bilayer, with water-loving (hydrophilic) heads facing outward and water-fearing (hydrophobic) tails facing inward, controlling what enters and leaves.
5.
FLASHCARD QUESTION
Front
Hydrophobic Adjective
[hahy-druh-foh-bik]
Back
Hydrophobic
The physical property of a molecule that is seemingly repelled from a mass of water.
Example: This diagram shows how hydrophobic ("water-fearing") tails of molecules cluster together to avoid water, a key principle for how cell membranes form.
6.
FLASHCARD QUESTION
Front
Hydrophilic Adjective
[hahy-druh-fil-ik]
Back
Hydrophilic
The physical property of a molecule that can transiently bond with water through hydrogen bonding.
Example: This diagram shows a cell membrane, where the round 'hydrophilic heads' are water-loving and face the watery areas inside and outside the cell.
7.
FLASHCARD QUESTION
Front
Passive Transport Noun
[pas-iv trans-port]
Back
Passive Transport
The movement of substances across a cell membrane without the use of energy by the cell, moving down a concentration gradient.
Example: This image shows how molecules naturally move from an area of high concentration (outside the cell) to an area of low concentration (inside the cell) over time.
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