OCR A Level Biology A lesson on Enzyme Inhibitors. This is one of eight lessons to meet the specification points for 2.1.4 Enzymes. Objectives for this lesson: • State the effects of inhibitors on the rate of enzyme-controlled reactions. • Describe how metabolic poisons and some medicinal drugs can act as enzyme inhibitors. • Explain the role of product inhibition and inactive precursors in metabolic pathways. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Theories on DNA. This is one of seven lessons to meet the specification points for 2.1.3 Nucleotides and Nucleic Acids. Objectives for this lesson: Recall the process of DNA replication. Know the importance of replication in conserving genetic information in accuracy and describe how random, spontaneous mutations can occur during replication. Evaluate experimental evidence for DNA. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on The Genetic Code. This is one of seven lessons to meet the specification points for 2.1.3 Nucleotides and Nucleic Acids. Objectives for this lesson: Recall the structure of an amino acid and polymerisation. Describe how a gene determines the sequence of amino acids in a polypeptide. Explain the nature of the genetic code. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

This is the first lesson in the Edexcel Combined Biology Topic 8 on Exchange and Transport in Animals. This lesson covers Specification points 8.1, 8.2 and 8.3. There are practice questions and examples on SA:V calculations and a knowledge recall plenary with answers.

OCR A Level Biology A lesson on Spirometry and Calculations. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (e) Objectives for this lesson: • Define the key terms; vital capacity, tidal volume, breathing rate and oxygen uptake. • Explain the relationship between vital capacity, tidal volume, breathing rate and oxygen uptake. • Analyse and interpret data of primary and secondary data. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

This is designed for the OCR A Level Biology A Module 3.1.1 Exchange Surfaces SLOP Booklet and Answers. It is a 35 page workbook for students to fill in and also has exam questions for each lesson. There is also answer books included. This workbook was designed with my lessons, so please check them out as well. Please leave a review.

OCR A Level Biology A lesson on Structure & Function of Gas Exchange System in a Bony Fish. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (f) Objectives for this lesson: • Describe the structure of gas exchange system in a bony fish. • Explain how ventilation works in fish. • Compare and contrast the human and fish respiratory system. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Structure and Function of Gas Exchange System in Insects. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (f) and (g) Objectives for this lesson: • Describe the structure of gas exchange system in an insect. • Explain how ventilation works in insects. • Demonstrate how the gaseous exchange system of an insect works through the use of modelling/dissection. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on The Requirements for Specialised Exchange Surfaces and their features. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (a) and (b) Objectives for this lesson: • Describe the features of an efficient exchange surface. • Calculate the surface area to volume ratio. • Explain the need for specialised exchange surfaces in both unicellular and multicellular organisms. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Dissection and Histology of Bony Fish Gills. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (f) and (g) Objectives for this lesson: • Recall how the gaseous exchange system of a fish works. • Know how to dissect the gaseous exchange system of a bony fish safely. • Demonstrate how to dissect, examine and draw the gaseous exchange system of a bony fish. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Ventilation. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 (d) Objectives for this lesson: • Name the components of the mammalian ventilation system. • Describe the mechanism for ventilation in mammals. • Explain the function of key components of the mammalian ventilation system. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on The Structure of the Mammalian Gas Exchange System. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 © Objectives for this lesson: • List the main components of the mammalian gaseous exchange system. • Describe the structures of the components of the mammalian gaseous exchange system. • Explain the functions of the components of the mammalian gaseous exchange system. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Histology of Gas Exchange System. This is one of eight lessons to meet the specification points for 3.1.1 Exchange Surfaces. Specification points: 3.1.1 © and (h) Objectives for this lesson: • Recall the main components of the mammalian gaseous exchange system. • Explain the functions of the components of the gaseous exchange system. • Examine practically the histology of the gaseous exchange system. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Vessel Structure. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 © Objectives for this lesson: • Describe the structure and function of different blood vessels. • Explain the distribution of different tissues within the vessel walls of blood vessels. • Link the structure and functions of arteries, arterioles, capillaries, venules and veins. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Haemoglobin – Role and Reactions. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (i) Objectives for this lesson: • Know the role of haemoglobin in the transportation of oxygen and carbon dioxide around the body. • Explain how carbonic anhydrase, haemoglobinic acid, HCO3- and the chloride shift are involved in oxygen and carbon dioxide transport. • Understand that oxygen molecules bind reversibly to haemoglobin. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Dissociation Curves. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (j) Objectives for this lesson: • Recognise the oxygen dissociation curves for human adult and fetal haemoglobin. • Explain the significance of the different affinities for oxygen. • Understand the changes to the dissociation curve at different carbon dioxide concentrations (the Bohr effect). Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on The Cardiac Cycle. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (f) Objectives for this lesson: • State the formula for calculating cardiac output. • Describe what happens during the cardiac cycle. • Calculate the cardiac output. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Heart Dissection PAG 2. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (e(ii)) Objectives for this lesson: • Recap the internal structures of the heart. • Dissect and examine the mammalian heart. • Draw the internal and external structures of the heart. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Tissue Fluid Formation and Retention. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (d) Objectives for this lesson: • Recap the names of the different blood vessels. • Describe how tissue fluid is formed from plasma. • Explain the differences in the composition of blood, tissue fluid and lymph. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.

OCR A Level Biology A lesson on Structure of the Mammalian Heart. This is one of ten lessons to meet the specification points for 3.1.2 Transport in Animals. Specification points: 3.1.2 (e(i)) Objectives for this lesson: • State the function of the coronary arteries. • Label the external and internal heart structures. • Explain the functions of the internal structures of the heart. Check out my other lessons and the accompanying workbook with exam questions (and answer booklet included). Please leave a review.