Unit 2H: Exchange, transport and reproduction in humans revision Go to www.spolem.co.uk, click on internet lessons, then unit 2H revision. Topic 2H.1 Exchanges with the environment Go to Epithelia. Work through the tutorial (follow the feet to get to the next page). Keep going until you have identified the mystery slides in the quiz. Go to Anatomy and physiology of the respiratory system. Answer the following questions: 1. List the structures (in order) that a molecule of oxygen will pass through on its journey from the air to the blood. ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… 2. Where and how are oxygen and carbon dioxide exchanged? ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… Go to Respiratory system to try a multiple choice test. Go to Lung toxicology problem set to try multiple choice questions on lung structure and the effects of smoking. Go to Life gas exchange in mammals. Work through tutorial 48.2 (airflow in mammals) and activities 48.1 and 48.3. The next section was to visit two sites on oxygen transport and carbon dioxide transport to explain how these are transported in the blood. Unfortunately these sites have gone so you’ll have to find this out for yourself! Go to GI system. Answer the following questions: 1. What type of epithelium lines the oesophagus? ………………………………………………………… 2. What is the name for the muscular contractions which move food through the system?………………………………………………………………………………… 3. How is the structure of the ileum adapted for maximum absorption? ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… Go to Life animal nutrition. Work through activity 50.2 Topic 2H.2 Transport of materials Go to Cardiovascular system anatomy and physiology. Answer the following questions: 1. 2. 3. 4. Where are the pacemaker cells located?…………………………………………………………………… What is systole?……………………………………………………………………………………………………………… What is diastole?…………………………………………………………………………………………………………… Draw and label a normal ECG wave below. Go to Primer on ECG for more information on these. Go to Cardiology the visible heart for an animation on blood flow through the heart. Go to Life circulatory systems. Work through tutorial 49.1 (the cardiac cycle) and activities 49.2 and 49.3. Go to Red blood cells. Look through the following slides to help you fill in the “drawing” column of the table below. Type of blood cell Erythrocyte Neutrophil Drawing Function Eosinophil Monocyte Lymphocyte Now go to Blood cell histology to help you fill in the “function” column. Go to Practice quiz for blood components to try some multiple choice questions. Go to Basic quiz for some questions on the above topics. Go to Circulation questions for some past exam questions – you need to click on Heart, T.Fluid and Cycle under Questions and Exercises. Finally go to Revision and answer questions 1-8 and 11-15 Topic 2H.3 Human ecology Go to Life temperature regulation. Work through the control regulation and feedback tutorial. Go to Homeostasis. Work through the sections on body temperature (section 2) and the skin. Go to Human adaptations to external environment for a set of revision notes on this topic. Go to the Human ecology links section of www.spolem.co.uk (look in A level biology) if you need to remind yourself of the effects of extreme temperature or high altitude on the body. Topic 2H.4 Human reproduction and development Go to S-cool reproduction. Answer the following questions: 1. What is spermatogenesis and where does it occur? ………………………………………………………………………………………………………………………………………………… 2. What is a Sertoli cell? ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… 3. Spot the mistake in the drawing of the sperm. ………………………………………………………………………………………………………………………………………………… 4. What is the production of eggs called? ………………………………………………………………………………………………………………………………………………… 5. What is a corpus luteum? ………………………………………………………………………………………………………………………………………………… 6. Name four substances that cross the placenta and in which direction they go. ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………………………… Go to Life animal reproduction. Work through tutorial 42.1 (ovarian and uterine cycles), then do activities 42.1, 42.2 and 42.3. Go to Reproduction and development for some multiple choice questions. Go to Human Reproduction problem set for lots more questions and tutorials. Then go to Basic quiz for yet more questions. General revision on this Unit Go to AS Guru organs and systems. Work through the animations and answer the questions. Go to Past exam questions. Look for suitable questions to tackle.