Uptake and Transport of Mineral Nutrients

The video explains the role of major and mineral nutrients in plants, detailing how carbon, hydrogen, and oxygen are obtained from the atmosphere and soil water, while other nutrients are absorbed from the soil. It covers the movement of nutrients from soil to roots through contact exchange, mass flow, and diffusion. The video also describes passive and active absorption mechanisms, and the transport of nutrients within plants via short and long distance pathways, highlighting the symplastic and apoplastic routes.

Which of the following nutrients is not considered a mineral nutrient because it is not obtained from the soil?

• Potassium

• Carbon

• Nitrogen

• Sulfur

What is the primary method by which nutrients like chloride and sodium are absorbed by plant roots?

• Diffusion

• Mass flow

• Root interception

• Contact exchange

In passive absorption, how do nutrient ions move across the plasma membrane?

• Against the concentration gradient

• Using ATP

• Along the concentration gradient

• Through active transport

What is the main energy source used in active transport of nutrients?

• Oxygen

• Sunlight

• ATP

• Glucose

Which process involves the movement of ions through small cytoplasmic connections between plant cells?

• Mass flow

• Symplastic route

• Contact exchange

• Apoplastic route

What is the role of the Casparian strip in nutrient transport?

• Promotes root interception

• Facilitates mass flow

• Acts as a barrier in the apoplastic pathway

• Enhances diffusion

Which elements are most readily mobilized from older to younger plant parts?

• Magnesium

• Phosphorus

• Calcium

• Iron