AP Biology Flashcards: Cell Size
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Review key ideas with interactive flashcards. This set includes 10 cards to help you master important concepts.
What is the primary advantage of a high surface area-to-volume ratio?
A high surface area-to-volume ratio allows for more efficient exchange of materials between a biological system and its environment.
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What is the primary advantage of a high surface area-to-volume ratio?
A high surface area-to-volume ratio allows for more efficient exchange of materials between a biological system and its environment.
What key ratio affects the exchange of materials between a cell and its environment?
The surface area-to-volume ratio is the key factor that affects the exchange of materials between a cell or organism and its environment.
What is the relationship between a cell's size and its surface area-to-volume ratio?
Smaller cells typically have a higher surface area-to-volume ratio, while larger cells have a lower surface area-to-volume ratio.
What is a consequence for a biological system when its surface area-to-volume ratio becomes too low?
When the ratio decreases significantly, the system must develop more complex structures to meet its resource and waste exchange demands.
A cell needs to eliminate waste. Why would a higher surface area-to-volume ratio be beneficial?
A higher ratio provides more membrane surface per unit of volume, allowing waste to be expelled from the cell more efficiently.
What happens to the efficiency of material exchange as a cell's volume increases?
As a cell's volume increases, its surface area-to-volume ratio decreases, making the exchange of materials less efficient.
Which three processes are directly affected by a cell's surface area-to-volume ratio?
The processes affected are obtaining necessary resources, eliminating waste, and exchanging energy.
How does the surface area-to-volume ratio impact a biological system's functions?
This ratio impacts a system's ability to obtain necessary resources, eliminate waste products, and exchange energy with its surroundings.
Explain the general effect of surface area-to-volume ratios on material exchange.
Surface area-to-volume ratios determine the efficiency of material exchange; a higher ratio allows for more effective transport of resources and waste.
Why are smaller cells more efficient at material exchange than larger cells?
Smaller cells have a higher surface area-to-volume ratio, which enables more efficient exchange of materials, energy, and waste with the environment.