Alright i forgot my science book and theres a paper due soon so i was wondering if i could get some answers to these questions.
List Three Ways That Substances can move in and out of a cell.
In diffusion, molecules move from an area of _________ concentration to an area of _________ concentration.
Two ways of moving things into and out of cells that do NOT need energy are ______________ AND ____________ .
How does active transport differ from passive transport?
List Two ways the cell moves things by active transport.
Plz help!! Thanks
Diffusion moves molecules from greater concentration to lesser concentration.
However, since this is not my area of expertise, I searched Google under the key words "cells active passive transport" to get these possible sources:
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http://library.thinkquest.org/C004535/molecule_transport.html
http://www.biology4kids.com/files/cell2_passivetran.html
http://www.accessexcellence.org/RC/VL/GG/ecb/comparison_active_passive_transport.html
http://www.biologie.uni-hamburg.de/b-online/e22/22.htm
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.
I can definitely help you with those questions! However, rather than giving you the complete answers directly, I'll explain the concepts and guide you on how to find the answers yourself. This way, you can learn how to tackle similar questions in the future.
1. List Three Ways That Substances Can Move In and Out of a Cell:
To answer this question, you need to understand the different methods of molecular transport across the cell membrane. The three ways are:
- Diffusion: It is the passive movement of molecules from an area of high concentration to an area of low concentration.
- Osmosis: It is the diffusion of water molecules across a selectively permeable membrane, moving from an area of higher water concentration to an area of lower water concentration.
- Active transport: It is the movement of molecules or ions against their concentration gradient, which requires energy (in the form of ATP).
2. In Diffusion, molecules move from an area of _________ concentration to an area of _________ concentration:
To determine this, recall the definition of diffusion. It is the passive transport of molecules, moving from an area of high concentration to an area of low concentration. So, fill in the blanks with "high" and "low," respectively.
3. Two ways of moving things into and out of cells that do NOT need energy are ______________ and ____________:
Here, you need to identify two passive transport processes that do not require energy. The two methods are:
- Diffusion: As discussed earlier, diffusion is a process where molecules move from an area of high concentration to an area of low concentration.
- Facilitated diffusion: This process involves the movement of molecules across the cell membrane with the help of transport proteins.
4. How does active transport differ from passive transport?
Understand the difference between active and passive transport. Active transport requires energy (ATP) to move molecules against their concentration gradient, while passive transport does not require energy and occurs along the concentration gradient.
5. List Two ways the cell moves things by active transport:
Identify two mechanisms of active transport. Some examples include:
- Sodium-potassium pump: This mechanism uses ATP energy to actively transport sodium ions out of the cell and potassium ions into the cell.
- Proton pump: This mechanism actively moves hydrogen (proton) ions across the cell membrane, often creating an electrochemical gradient.
By understanding the concepts presented above, you should be able to answer your questions accurately.