Form 4 Human & Social Biology

  Human and Social Biology -                   Form 4 
(11:31:30 2010-10-02) Test 1 Revision Questions
  1. What is excretion?
  2.  What is egestion?
  3. List the excretory organs and their excretory products. 
  4. How does blood get into and out of the kidney?
  5. List the four main parts of the kidney.
  6. What are the two main processes that occur in the nephrons to purify blood?
  7. Name the two places in the nephrons where water is reabsorbed?
  8. What is the composition of urine?
  9. The two main layers of the skin are?
  10. What substance gives the skin its colour?
  11.  What is homeostasis?
  12. List 2 mechanisms by which the body keeps cool?
  13. List 3 mechanisms by which the body keeps warm?
  14. Which organ is responsible for glucose regulation?
  15. Which two hormones are responsible for glucose regulation?
  16. Which hormone raises glucose level?
  17. Define 'osmoregulation'? 
  18. How does ADH affect structures in the nephrons? 
  19. What is the role of the hypothalamus?
  20. What is the role of the pituitary gland?
  21. Why do hair follicles stand erect when we are cold?
  22. What is considered normal blood glucose level?
  23. What effect does ADH have on structures in the nephrons? 
  24. Why does a person who is drinking alcohol have the urge to urinate often?
  25. What happens when blood glucose level is too low? too high? Explain in detail. 
  26. What happens when body fluids are too dilute? too concentrated? Explain in detail. 
  27. What happens when we get too hot? too cold? Explain in detail.
  28. The liver is not an excretory organ, but what is its role in excretion? 

Diagram of the internal structure of the skin 
Diagram of the internal structure of the kidney  
Diagram of a nephron  
09:46:55 2010-10-06 Article # 1
This article can be found at the following web address. Simply copy and paste it into a new browser.
 After you have finished reading the article, answer the following questions based on it. These answers are due on next Wednesday (13th Oct.).
  • All answers MUST come from the article 
  • Answers MUST be in your OWN words  
  • Answers MUST be written on a file page or typed 
 The aim of this type of assignment is two-fold: to help you improve your writing skills through the exposure of written work that is supplementary to your in-class material; to expose you to materials that shows the application and importance of Human and Social Biology in every-day life. 
  1. What are neurotransmitters?
  2. What is a synapse and where is it found? 
  3. What mostly influences our brain organisation?
  4. Explain what is meant by 'cortical plasticity'.
  5. Why are adult brains less flexible?
  6. Why are human brains larger than those of our ancestors?
  7. When your right hand touches something hot which hemisphere, the right or left, receives information about the hot substance touched? 
  8. What is 'lateralization'? 
  9. Is the male brain larger than the female brain?
  10. Why do many drugs work?
  11. What are endorphins? Which category of drugs are they similar to? 
  12. What is the affect of alcohol and caffeine on the brain? 
  13. What is the relationship between the knowledge of neurotransmitters and drug design? 
15:12:24  2010-10-15  Article # 2 
Read the following article and answer the questions in your own words. This is due on Thursday Oct. 21st although we have no class on that day.
 The article can be found at the following website: 
  1.  What happens to neurones as a person heads to deep sleep?
  2. What is one of the most useful tools used to study electrical currents in the brain? How does it represent brain activity?
  3. What type of "EEG squiggle" were Cash and the other researchers interested in? What does this show to a trained scientist? When does it show up on an EEG?
  4. What is Epilepsy? 
  5. Electrodes may be implanted deep within the brain of epileptic patients. Why are electrodes important?
  6. What is the K-complex a sign of?
  7. Do all or some neurones take a break? Provide evidence to support your answer.