Root Hair Cell Functions and Structures

The video explains the role of roots in plants, focusing on their functions in anchoring plants, absorbing water and minerals, and conducting these to other parts of the plant. It highlights the importance of water in plant processes like photosynthesis and transpiration. The video also details how roots absorb minerals from the soil and the factors affecting water absorption, such as root surface area and cell sap concentration. The structure of roots, including primary, secondary, and tertiary roots, is discussed, along with the function of root hair cells in facilitating absorption.

What is one of the primary functions of plant roots?

• To perform photosynthesis

• To attract pollinators

• To produce flowers

• To anchor the plant to the soil

How does water contribute to the mechanical strength of plant cells?

• By forming cell walls

• By providing turgor pressure

• By dissolving nutrients

• By aiding in respiration

Which of the following minerals is NOT absorbed by plant roots?

• Carbonates

• Nitrates

• Sulfates

• Phosphates

What factor increases the root's ability to absorb water?

• High temperature

• Thick cell walls

• Low humidity

• Large surface area

What is the primary role of root hairs in plants?

• To conduct photosynthesis

• To support the plant structure

• To absorb water and nutrients

• To produce seeds

What is the composition of a root hair?

• A group of tissues

• A single cell

• A cluster of cells

• Multiple cells

What is the function of vacuoles in root hair cells?

• To store water

• To store proteins

• To store salts

• To store carbohydrates

How do dissolved salts in root hairs affect water movement?

• They repel water

• They create a high concentration gradient

• They block water entry

• They dissolve in water

What is the nature of the cell wall in root hair cells?

• Flexible and impermeable

• Rigid and semi-permeable

• Thin and permeable

• Thick and impermeable

What is the role of the cell membrane in root hair cells?

• To block all molecules

• To allow all molecules to pass

• To allow selective movement of molecules

• To dissolve nutrients