Back to AI Flashcard MakerAnatomy and Physiology /Cell Membrane Structure and Transport Mechanisms Part 1
Cell Membrane Structure and Transport Mechanisms Part 1
This deck covers the fundamental concepts of cell membrane structure and various transport mechanisms, including passive and active transport, diffusion, and osmosis.
Which of the following statements best describes the function of a cell membrane?
The cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell.
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Key Terms
Term
Definition
Which of the following statements best describes the function of a cell membrane?
The cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell.
Which of the following statements describes the structure of the plasma membrane?
It is a lipid bilayer with the hydrophobic area pointing inward, and the hydrophilic area facing outward.
Which of the following is not a factor that determines whether or not a molecule is allowed to cross a cell membrane?
Temperature
Some molecules require the cell to use energy for movement across the membrane. This is called _______.
active transport
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. cholesterol
strength
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. Protein
Transport
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| Term | Definition |
|---|---|
Which of the following statements best describes the function of a cell membrane? | The cell membrane has many functions, but its primary action is to regulate the movement of materials into and out of the cell. |
Which of the following statements describes the structure of the plasma membrane? | It is a lipid bilayer with the hydrophobic area pointing inward, and the hydrophilic area facing outward. |
Which of the following is not a factor that determines whether or not a molecule is allowed to cross a cell membrane? | Temperature |
Some molecules require the cell to use energy for movement across the membrane. This is called _______. | active transport |
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. cholesterol | strength |
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. Protein | Transport |
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. Carbohydrate | Communication |
Different molecules are mixed into the phospholipid bilayer to aid in different functions. Match each molecule to the function it provides. Phosphate | Structure |
How are membrane receptors different from intracellular receptors? | Membrane receptors are located on the outside of the cell, while intracellular receptors are found on the inside. |
Which of the following does not affect a molecule's ability to cross a cell membrane? | energy of the cell |
The random movement of molecules is referred to as _______. | Brownian Movement |
_______ is the movement of molecules across a membrane without the cell expending any of its own energy. | Passive transport |
Diffusion is a type of passive transport. Which of the following are also considered characteristics of diffusion? | works from a region of higher concentration to one of lower concentration
does not require energy
helps oxygen cross the cell membrane easily |
Which of the following statements is true of a hypertonic solution? | A solution is hypertonic when the concentration of dissolved particles is higher outside of the cell than it is inside of the cell. This means the water concentration is higher inside the cell. |
Submersion in which type of solution is best for plants, because it causes high turgor pressure? | Hypotonic |
A cell with 25% particles is placed in a solution with 55% particles. The solution has what type of tonicity? | Hypertonic |
Which type of cells thrive in an isotonic solution? | Animal cells |
If you place a plant cell in a solution that has a higher salt concentration, which of the following will occur? | Water exits the cell
The cell shrinks
water enters the outside solution |
Facilitated diffusion is an example of _____ transport. | Passive |
Facilitated diffusion requires a _____ carrier to aid in membrane traffic. | Protein |