Cell structure and function | AP®︎/College Biology | Science | Khan Academy
Take your cellular knowledge to the next level! From organelles to membrane transport, this unit covers the facts you need to know about cells - the tiny building blocks of life.
概览
收录于
2026年3月17日
学科与领域
life-health · cells-cellular-processes
年级范围
九年级（高一）–十二年级（高四）
页面类型
Course
简介
Unit 2: Cell Structure and Function (AP Biology)
This unit covers the fundamental biological principles of cellular organization, membrane dynamics, and transport mechanisms as required by the AP Biology curriculum.
- Core Topics:
- Cell Structures: Analysis of organelles and their specific functions.
- Cell Size: The relationship between surface area-to-volume ratios and cellular efficiency.
- Plasma Membranes: Structure, composition, and the role of membrane permeability.
- Membrane Transport: Mechanisms including facilitated diffusion, active transport, and passive transport.
- Tonicity and Osmoregulation: How cells manage water balance and solute concentrations.
- Cell Compartmentalization: The functional significance of internal membrane-bound structures.
- Assessment Structure:
- Three formative quizzes covering specific sub-topics.
- One comprehensive Unit Test.
- Curriculum Alignment: The content is mapped to AP Biology Big Ideas, including:
- ENE (Energy): Energy transfer and metabolic processes.
- EVO (Evolution): Evolutionary history and cellular origins.
- SYI (Systems and Interactions): How biological systems interact and maintain homeostasis.
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