Hyperpolarisation Guides d'étude, Notes de cours & Résumés

AQA A Level Biology Revised Test : Year 2- Nervous Coordination 2023What is the value of the resting potential of a neurone? - ANSWER -70mV Why is the resting potential of a neurone negative? - ANSWER There are more positive ions outside the cell than inside How is the resting potential maintained? - ANSWER Sodium-potassium pump actively transports 3 Na+ out for ever 2 K+ into the neurone (ATP Hydrolysed) Membrane more permeable to K+ and less permeable to Na+ What happens if the ...

Summary of all you need to know about neuromuscular junction for you AQA Biology Alevel exam.

Suggest the advantages of the change in blood flow in blood vessels during exercise. [3 marks] - answer--more blood flow to muscles during exercise -supplying more glucose and oxygen/ removing carbon dioxide/ lactic acid/ heat -for high rate of respiration/ to meet increased demand for energy Explain how microorganisms contributed to the increase in temperature during processing of organic waste. [2 marks] - answer-respiration produces heat explain the advantage of showing the data using...

Suggest the advantages of the change in blood flow in blood vessels during exercise. [3 marks] - answer--more blood flow to muscles during exercise -supplying more glucose and oxygen/ removing carbon dioxide/ lactic acid/ heat -for high rate of respiration/ to meet increased demand for energy Explain how microorganisms contributed to the increase in temperature during processing of organic waste. [2 marks] - answer-respiration produces heat explain the advantage of showing the data using...

A summary of what you need to know about action potential and nerve impulses for your AQA Biology A-level exam.

1. Alleles that are neither dominant nor recessive to one another, so both alleles are always expressed in the phenotype. Codominant 2. The inheritance of a single gene Monohybrid inheri- tance 3. Physical, behavioural, biochemical expression of an organisms genotype Phenotype 4. The type of genes an individual has Genotype 5. Alles that is always expressed in the phenotype Dominant 6. Only expressed in the phenotype when homozy- gous Recessive 7. both alleles are...

Test Quiz Exam 2023 (AQA A biology paper 2) describe and explain the steps in the light dependent reaction of photosynthesis - CORRECT ANSWER-1. photoionisation: light reaches chlorophyll in PSII, which is absorbed by an electron, which becomes excited and moves to a higher energy level. 2. the electron passes to a carrier protein in the thylakoid membrane, and is passed down a series of carrier molecules called an electron transfer chain. 3. as the electron moves down, energy is lost ...

Molecular phylogeny It compares the structure of a particular molecule from different organisms to discover their degree of evolutionary relation. Somatic cell A cell in an organism which isn't a gamete. DNA Deoxyribose nucleic acid. Carries the genetic information for cells and some viruses. mRNA Messenger ribose nucleic acid (single stranded). The product of transcription. Speciation The process through which a species is created Sympatric Due to repro...

What is negative feedback? correct answerA response that returns a change in levels, back to normal. What is positive feedback? correct answerA response that amplifies a change from the normal level. Which factors influence blood glucose concentration? correct answerEating food containing carbohydrates, glucose absorbed from intestine to blood. Exercising, more glucose is used in respiration to release energy. What is the effect of insulin? correct answerDecreases blood glucose concen...

Notes containing detailed information about the Pancinian Corpuscle, Neurones, Nervous Transmission and Synapses, corresponding to information from the OCR Biology A textbook