Bishop Year 13 Biology

- Recap of the structure and function of adrenal glands including location (above the kidneys), different regions and the functions of different regions - LEARN! - Recap of the role of hormones in negative feedback - every hormone is released from a specific gland and travels in the blood around the entire body. The hormone is detected by certain TARGET CELLS and an EFFECT is produced - Control of blood glucose is regulated by the hormones GLUCAGON and INSULIN - They are released from the ISLETS OF LANGERHANS in the pancreas - Glucagon is released when blood glucose levels fall. It effects the liver and results in an INCREASE in the concentration of blood glucose - Insulin is released when blood glucose levels rise. It effects the liver and results in a DECREASE in the concentration of blood glucose New associated key words:  GLUCONEOGENESIS: Production of new glucose in the liver and muscle cells from lipid molecules. Stimulated by GLUCAGON GLYCOGEN...

- Summary of ecothermy and endothermy including adaptations to these lifestyles FOR EXAMPLE: Many reptiles with bask in the sun to increase their body temperature in the morning which enables them to become more active - Introduction of key words relating to the topic including: endocrine gland, exocrine gland, target organ, hormone, protein hormone, lipid hormone - Explanation of the different modes of action of protein hormones vs. lipid hormones - PROTEIN HORMONES - protein hormones bind to cell surface receptors and initiate G proteins which activates adenyl cyclase producing the second messenger cAMP - STEROID HORMONES - diffuse directly across the membrane and bind with receptor molecules in the cytoplasm forming hormone-receptor complexes. These then cross into the nucleus and act as transcription factors HOMEWORK - 1. revise for the mock exam! 2. Write an essay explaining how the release of insulin is controlled and how this helps to regulat...

Recap of the meanings of homeostasis, negative feedback and positive feedback Sorting of a range of communication pathways into positive and negative feedback: POSIVE - propagation of an action potential, oxytocin release during childbirth; NEGATIVE: temperature control in humans, control of blood water potential in humans Use of video to introduce difference in lifestyle between different organisms: Note that the lizard can move rapidly over short distances but cannot maintain a high level of activity - it mainly relies on AMBUSH PREDATION which is powered largely by anaerobic respiration. Its body temperature varies with the varying temperature of the environment - it is an ECTOTHERM The shrew on the other hand is always ready for large amounts of activity by having a high metabolic rate and a constantly high internal temperature - it is an ENDOTHERM Summary of the benefits and drawbacks of endothermy and ectothermy Summary of the BEHAVIOURAL and PHYSIOLOGICAL ada...

- The vast majority of you have now completed the PAG - The write up is due IN FULL by the final Friday of half term (19th October) See summary of what is required below. Please see me if you need any support WELL IN ADVANCE of the deadline

....is now with the academic mentors. You have until FRIDAY AFTERNOON ( 12th October) to complete this.

Student code Mark Grade I 10/11 A E 6/11 C G 6/11 C C 5/11 D M 8/11 A K 7/11 B H 6/11 C D 8/11 A A 5/11 D B 3/11 E

A reminder that Tuesday's lesson will involve a PAG - if you have your PAG book at home you need to bring it in