2022 AQA GCSE Biology Paper 2 with 100% Correct Answers Last document update:   ago

What is homeostasis? Homeostasis is the maintenance of a constant internal environment in order to maintain optimum conditions for enzyme and cellular function. Give examples of conditions maintained by homeostasis in the body ● Blood glucose concentration ● Body temperature ● Water levels What two types of responses are used in body control systems? Nervous and chemical What three components do all control systems have? ● Receptors ● Coordination centres

BIOL 1406 STUDY GUIDE: Lecture guide and Exam 1 review Last document update:   ago

BIOL 1406 STUDY GUIDE: Lecture guide and Exam 1 review What is matter and what are elements? What are the 4 most common types of elements in living things? *Matter is anything that takes up space & has mass. *Elements are substances that cannot be broken down to other substances by chemical reactions *The four most common elements in living things are Oxygen, Hydrogen, Nitrogen, & Carbon What are the 3 major components of an atom and their respective charges? Neutron (No charge) Proton...

GCSE BIOLOGY 8461/2H Last document update:   ago

The mark scheme for each question shows: • the marks available for each part of the question • the total marks available for the question • the typical answer or answers which are expected • extra information to help the Examiner make his or her judgement • the Assessment Objectives, level of demand and specification content that each question is intended to cover. The extra information is aligned to the appropriate answer in the left-hand part of the mark scheme and should o...