Bishop Year 13 Biology

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

- A reminder that on Monday's lesson you should all bring in your completed PAG research AND your copy of the progression exam re-sit if you were given it to take home

Student code Mark Grade I 12/19 B E 9/19 D G 12/19 A C 8/19 D M 13/19 A L 9/19 D K 10/19 C D 7/19 E A 7/19 E F 12/19 B N 8/19 D B 13/19 A