Aqa gcse biology pape - Study guides, Class notes & Summaries

What is homeostasis? - correct answer The maintenance of a constant internal environment. What is a stimulus? - correct answer A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - correct answer Detect the stimulus or change in environment. What happens after the receptors? - correct answer Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system...

What is homeostasis? - ANSWERThe maintenance of a constant internal environment. What is a stimulus? - ANSWERA change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - ANSWERDetect the stimulus or change in environment. What happens after the receptors? - ANSWERReceptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? - ANSWERThe brain or spinal cord ...

What is homeostasis? - correct answer The maintenance of a constant internal environment. What is a stimulus? - correct answer A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - correct answer Detect the stimulus or change in environment. What happens ...

AQA GCSE Biology Paper 1 Graded A+ Magnification equation ️Magnification= image size/actual object size Light microscope- how many um in 1 mm ️1000 um light microscope- how many nm in 1 um ️1000 nm Light microscope- why can we see the nucleus and cell wall but not the mitochondria ️Too small and not stained light microscope- how can we see smaller parts of cells ️An electron microscope has much more resolution and magnification What is osmosis? ️The movement of water ...

Name the main organelles in an animal cell: - ANSWER > nucleus > cytoplasm > cell membrane > ribosomes > mitochondria What organelles does a plant cell have but animal cell doesn't? - ANSWER > chloroplast > cell wall > vacuole What organelles does a Bacteria cell have? - ANSWER > no nucleus > circular strand of DNA > rings of plasmid > cell wall > cell membrane

Name the two types of Eukaryotic cells - ANSWER Plant cells, animal cells What type of cells are Prokaryotic cells? - ANSWER Bacteria cells Where are chromosomes found in an animal cell - ANSWER Nucleus Describe the DNA in a bacteria cell - ANSWER A single DNA loop or a DNA ring (plasmid) What is 'centi' in standard form? - ANSWER 10 to the power of -2

What is homeostasis? - correct answer The maintenance of a constant internal environment. What is a stimulus? - correct answer A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - correct answer Detect the stimulus or change in environment. What happens after the receptors? - correct answer Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system...

AQA GCSE Biology Paper 2 Practice Questions and Answers What is homeostasis? - ANSWER-The maintenance of a constant internal environment. What is a stimulus? - ANSWER-A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - ANSWER-Detect the stimulus or change in environment. What happens after the receptors? - ANSWER-Receptors send messages to the CNS via the sensory neurone. What makes up the ce...

AQA GCSE Biology Paper 2 280 questions and answers. AQA GCSE Biology Paper 2 280 questions and answers. AQA GCSE Biology Paper 2 280 questions and answers. AQA GCSE Biology Paper 2 280 questions and answers. AQA GCSE Biology Paper 2 280 questions and answers.

AQA GCSE Biology Paper 2 Questions and Answers 100% Pass What is homeostasis? - Answer️️ -The maintenance of a constant internal environment. What is a stimulus? - Answer️️ -A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - Answer️️ -Detect the stimulus or change in environment. What happens after the receptors? - Answer️️ -Receptors send messages to the CNS via the sensory ...