Cell Processes And Energy Flashcards
What is the primary function of the cell membrane?
It is selectively permeable, allowing some substances to pass through while blocking others
This property is crucial for maintaining homeostasis within the cell.
What are the two types of transport across the cell membrane?
- Passive transport
- Active transport
Passive transport does not require energy, while active transport does.
What is passive transport?
The movement of materials through a cell membrane without using energy
This occurs naturally and does not require cellular energy.
What are the two different kinds of passive transport?
- Diffusion
- Osmosis
Diffusion refers to the movement of molecules from an area of higher concentration to an area of lower concentration, while osmosis specifically involves the movement of water.
Define diffusion in the context of passive transport.
A form of passive transport without energy
It involves the movement of particles until they are evenly distributed.
What is osmosis?
The diffusion of water across a selectively permeable membrane
Osmosis plays a crucial role in maintaining cellular function.
What is respiration in biological terms?
The process of withdrawing energy from glucose
This process is essential for cellular functions and is also known as cellular respiration.
What is another name for cellular respiration?
Respiration
It emphasizes the energy conversion that occurs within the cell.
What is needed for cellular respiration to occur?
Oxygen
Oxygen is a critical component for the breakdown of glucose to release energy.
Why do we need energy in our bodies?
For all of our bodily functions
Energy is required for processes such as movement, growth, and cellular repair.
What are cells?
Cells are the basic building blocks of living things.
What are cells made of?
Cells are made of chemicals (elements and compounds).
Define a compound.
A compound is a substance formed when two or more elements combine chemically.
What is an atom?
An atom is the smallest unit of an element.
What is a molecule?
A molecule is the smallest unit of most chemicals.
