Homework - diffusion, osmosis

• Biology
• Lower Secondary (Key Stage 3)

Homework - diffusion, osmosis

What process do cells use to move particles until they are evenly spread?

1. Osmosis
2. Active transport
3. Endocytosis
4. Diffusion

In which direction does the net movement of particles occur during diffusion?

1. No net movement
2. From high to low concentration
3. In a random direction
4. From low to high concentration

Where does diffusion occur?

1. In living organisms
2. In solids
3. In liquids and gases
4. In a vacuum

What happens to particles during diffusion if the temperature increases?

1. They speed up
2. They stop moving
3. They change direction
4. They slow down

What is the term for the movement of particles down a concentration gradient?

1. Diffusion
2. Endocytosis
3. Active transport
4. Osmosis

What is the name of the reaction that mitochondria use to make energy?

1. Respiration
2. Oxidation
3. Fermentation
4. Photosynthesis

What is the function of alveoli in the lungs?

1. Producing mucus
2. Maximize diffusion of gases
3. Pumping air in and out
4. Storing oxygen

What is the role of villi in the small intestine?

1. Produce bile
2. Allow glucose diffusion into bloodstream
3. Store nutrients
4. Absorb water

What provides a carbon dioxide rich blood supply to the alveoli?

1. Arteries
2. Capillaries
3. Veins
4. Lymph vessels

What helps maintain the concentration gradient across the cells?

1. Low temperature
2. Thick cell walls
3. High pressure
4. Large surface area to volume ratio

How does carbon dioxide reach the palisade cells in the leaves for photosynthesis?

1. Transported directly from the roots
2. Through diffusion from the air outside the leaf
3. Through active transport from the soil
4. By absorption through the stem

What type of diffusion allows water to enter the root hair cells from the soil?

1. Passive diffusion
2. Osmosis
3. Facilitated diffusion
4. Active transport

After photosynthesis, how is glucose transported to different areas of the plant?

1. Through the stomata
2. By diffusion through the air
3. Via the xylem
4. Via the phloem

What happens to the oxygen that is not used in respiration in the leaf?

1. It diffuses out of the leaf
2. It is converted into carbon dioxide
3. It is released through transpiration
4. It is stored in the chloroplasts

How does water travel from the roots to the leaves of a plant?

1. Transported in the form of glucose
2. By diffusion through the air
3. Through the xylem
4. Through the phloem

What is the movement of water molecules from a region of higher concentration to a region of lower concentration through a partially permeable membrane called?

1. Diffusion
2. Facilitated diffusion
3. Active transport
4. Osmosis

In biological systems, cells contain dilute solutions of ions, sugars, and amino acids. What type of membrane is found in cells that allows the movement of water molecules through osmosis?

1. Fully permeable membrane
2. Partially permeable membrane
3. Impermeable membrane
4. Active transport membrane

Water moves into our cells by osmosis if the ______ concentration inside the cell is higher than outside.

1. Water
2. Solute
3. Gas
4. Solvent

Does osmosis require energy to move water molecules from a dilute solution to a more concentrated solution through a partially permeable membrane?

1. Only in plant cells
2. Depends on the temperature
3. Yes, osmosis requires energy.
4. No, osmosis does not use energy.

In our cells, osmosis refers to the movement of water molecules from a ______ solution to a more concentrated solution through a partially permeable membrane.

1. Saturated
2. Concentrated
3. Dilute
4. Solid

What happens to plant cells placed in a dilute solution?

1. They become turgid
2. They take in water by osmosis
3. They lose water by osmosis
4. The cell wall shrinks

How do root hair cells behave in wet or moist soil?

1. The cell undergoes plasmolysis
2. They take up water by osmosis
3. They become flaccid
4. They lose water by osmosis

What happens to plant cells in a concentrated solution?

1. The cell starts to lose water by osmosis
2. The cell detaches from the cell wall
3. The cell becomes turgid
4. The cell undergoes plasmolysis

What is the role of the cellulose cell wall in plant cells?

1. Supports the vacuole
2. Prevents osmosis
3. Causes plasmolysis
4. Supports the cell and prevents bursting when gaining water

What happens to the cell membrane in a highly-concentrated solution?

1. It becomes completely detached from the cell wall
2. It expands and supports the cell
3. It becomes turgid
4. It merges with the cell wall

What happens to an animal cell when placed in a dilute solution?

1. The cell bursts due to excessive water
2. Water leaves the cell, causing it to shrink
3. The cell remains unaffected by the solution
4. Water enters the cell, causing it to swell

Why is it crucial for animal cells to regulate the concentration of body fluids?

1. To ensure cells function efficiently
2. To increase cellular respiration
3. To prevent cell division
4. To promote rapid cell growth

What happens to an animal cell in a concentrated solution?

1. The cell undergoes rapid division
2. The cell absorbs water and swells
3. The cell loses water and shrivels
4. The cell remains unaffected by the solution

What is the consequence of excessive water entering an animal cell?

1. The cell bursts
2. The cell shrinks and becomes more efficient
3. The cell loses its function
4. The cell remains unaffected by the water

What is the impact of a concentrated solution on an animal cell?

1. The cell bursts due to excessive water
2. The cell absorbs water and becomes more efficient
3. The cell remains unchanged
4. The cell loses water and its function