GEN. bio. Flashcards
- The figure below shows a set-up consisting of two regions separated by a membrane. Glucose is added to one side of the membrane. What natural phenomenon has occurred in this setup?
osmosis
- Blue ink was added to water which gradually forms a blue solution. Which of the following statements correctly describes the movement of ink in the water?
The ink molecules spread from an area of higher ink concentration to an area of lower concentration.
- Someone at the other end of a restaurant smokes a cigarette but you may smell and even breathe in the smoke. The movement of this smoke is similar to what specific type of transport?
diffusion
- The concentration of sodium ions in a cell is 10 times less than the concentration of the surrounding fluid. How can sodium ions move into the cell?
facilitated diffusion
- Which of the following correctly describes a substance that contains a solute and a solvent?
solution
- Which of the following statements is correct about placing a cell in a hypotonic solution?
The water enters the cell toward the area of higher solute concentration.
- In the figure below, a thin membrane contains 25% sugar solution submerged in a solution of 5% sugar. Which of the following will most likely happen in the setup?
The water from the beaker will enter the membrane since it has higher solute concentration.
- Which of the following terms refers to the fluid pressure that causes the plasma membrane to push against the cell wall?
turgor pressure
- Which of the following terms will complete the statement below?
A cell may_______when moved from isotonic to hypertonic solutions, whereas a cell may______when moved from hypotonic to
isotonic solutions.
shrivel; return to its normal shape
- The total solute concentration in a red blood cell is about 2%. Sucrose cannot pass through a red blood cell’s plasma membrane, but water and urea can. Osmosis will cause such a cell to shrink the most when the cell is immersed in which of the following solutions?
hypertonic urea solution
- Identify the correct term being described in each of the following statements.
- It refers to the diffusion of water across a selectively permeable membrane from an area with high concentration to one with low concentration. osmosis
osmosis
- Identify the correct term being described in each of the following statements.
- It refers to the diffusion of water across a selectively permeable membrane from an area with high concentration to one with low concentration.
osmosis
- It is the general movement of molecules from an area of higher concentration to one with a lower concentration
diffusion
- This state occurs when solute concentrations are the same on both sides of a membrane and water molecules move at the same rate in both directions.
isotonic
- It refers to a solution where water is drawn out of the cell.
hypertonic
- It refers to a solution where water is drawn into the cell.
hypotonic
19.It is a mixture of substances that has a uniform distribution of constituent molecules.
solution
- It is one of the components of a homogeneous mixture that is usually solid.
solute
- It is one of the components of a homogeneous mixture that is usually liquid.
solvent
- Classify the following situations based on the tonicity of the surrounding environment. Choose from isotonic, hypotonic, or hypertonic.
Many animals living in an estuary, such as oysters, blue crabs, and some fishes, are able to cope with the changes in the salinity of their environment by using their specialized gills and kidneys.
hypotonic
- It can be observed that plants wilt and are almost dying along a salted roadside.
hypertonic
- A red blood cell is placed in a solution with a high solute concentration which results in the cell shrinking its size.
hypertonic
- Choose the best term that applies in each of the given situations.
When steeping a cup of tea, molecules from the tea cross from the teabag and spread throughout the cup of water.
diffusion
- When a person stays in a water bath for a prolonged time, his or her skin becomes wrinkled due to the water flowing into the upper skin cells.
osmosis
- When a plant cell is placed in a hypotonic solution, the cytoplasm expands and the plasma membrane pushes against the cell wall, but the cell does not burst.
turgor pressure
- Potassium ions can easily pass through the cell membrane without using energy via carrier proteins.
facilitated diffusion
- It is a type of passive transport that requires specific transport proteins to move molecules across a membrane.
facilitated diffusion
- Paramecia live in freshwater environments and use their contractile vacuoles to get rid of excess water.
hypotonic
- Some animals must drink the saltwater to get the water into their bodies, but they maintain it by making the salts concentrated and excreted from the body.
hypertonic
- It refers to the relative concentration of solutes in fluids separated by a selectively permeable membrane.
tonicity
