Module 5.1.2 REVISION (Excretion)

This revision lesson uses a 15 question multiple-choice assessment to challenge the students on their knowledge of the content of module 5.1.2. In addition to the assessment, this lesson includes a PowerPoint where the answers are revealed, a series of key points linked to the OCR A-level biology A specification, and additional questions to challenge knowledge not directly covered by the 15 multiple-choice questions.

The topics challenged by the assessment are:

• The meaning of the term excretion (as opposed to egestion)
• The structure of the liver
• The formation of urea by the ornithine cycle
• The regions of the kidney
• Ultrafiltration in the glomerulus
• The structure and function of the PCT
• The countercurrent multiplier mechanism in the loop of Henle
• Osmoregulation
• Homeostasis
• The use of renal dialysis
• Monoclonal antibodies in diagnostic tests