Biology - How the Kidneys Work - (Kidneys Part 1/3) #27

The video explains the kidneys' roles in filtering blood, removing waste like urea, and regulating ions and water. It details the processes of filtration and selective reabsorption in the nephrons. The video also covers how the hypothalamus and pituitary gland regulate water levels through ADH, maintaining balance via a negative feedback loop.

What is the main waste product removed by the kidneys?

• Proteins

• Urea

• Carbohydrates

• Glucose

Which ions are regulated by the kidneys to prevent damage to cells?

• Calcium and Magnesium

• Sodium and Potassium

• Iron and Zinc

• Chloride and Fluoride

What is the process called where the kidneys reabsorb only the substances needed by the body?

• Diffusion

• Filtration

• Selective Reabsorption

• Osmosis

Which structure in the brain detects water concentration in the bloodstream?

• Cerebellum

• Hypothalamus

• Medulla

• Cortex

What hormone is released by the pituitary gland to regulate water levels?

• Insulin

• Adrenaline

• ADH (Anti Diuretic Hormone)

• Thyroxine

What happens to the amount of urine produced when ADH levels increase?

• Urine production decreases

• Urine production increases

• Urine production remains the same

• Urine becomes more concentrated

What type of feedback loop is involved in water regulation in the body?

• Neutral feedback loop

• Negative feedback loop

• Cyclic feedback loop

• Positive feedback loop