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Questions and Answers
Which of the following is true about cells?
Which of the following is true about cells?
- Cells are composed of trillions of cells
- Cells are the basic structural and functional units of organisms (correct)
- Cells do not provide structure for the body
- Cells do not take in nutrients from food
What is active transport?
What is active transport?
- A transport process in which solutes move from areas of greater to lesser concentration
- A transport process that does not require energy
- A transport process that occurs in the absence of ATP
- A transport process in which solutes move from areas of lesser to greater concentration (correct)
What are cilia?
What are cilia?
- A passive transport mechanism that involves the movement of particles from an area of higher to lower concentration
- Gel-like substance surrounding the nucleus & filling the cell
- Large polymer of a nucleotide that carries the genetic information of a cell
- Hair-like processes on the surface of the cell that propel materials across a surface (correct)
What is cytoplasm?
What is cytoplasm?
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What is diffusion?
What is diffusion?
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Study Notes
Cellular Biology
- Cells are the basic structural and functional units of life.
- Cells can be thought of as tiny rooms that contain all the components necessary for life.
Active Transport
- Active transport is the movement of molecules from an area of low concentration to an area of high concentration.
- This process requires energy, usually in the form of ATP.
- Active transport is necessary for cells to maintain proper internal environments and to regulate the concentration of certain molecules.
Cilia
- Cilia are small, hair-like structures that protrude from the surface of cells.
- Cilia are involved in movement, sensing, and signaling.
- They can be found in many types of cells, including epithelial cells, nerve cells, and sperm cells.
Cytoplasm
- Cytoplasm is the jelly-like substance inside a cell membrane.
- It is composed of water, salts, sugars, and various organelles.
- Cytoplasm provides a medium for chemical reactions, supports cell division, and helps maintain cell shape.
Diffusion
- Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.
- This process occurs naturally, without the need for energy input.
- Diffusion helps to distribute nutrients, oxygen, and other essential molecules throughout the cell.
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