Repolarisation Study guides, Class notes & Summaries

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 ...

BTEC Applied Science Unit 1 Biology Exam 118 Questions with Answers Describe the function of the nucleolus - CORRECT ANSWER Produces ribosomes and RNA Describe the function of the cell wall - CORRECT ANSWER Provides rigidity and protection to the cell Describe the function of the chloroplasts - CORRECT ANSWER Site of photosynthesis as they contain chlorophyll Describe the function of the plasmodesmata - CORRECT ANSWER A channel through the cell wall the allows transport of materials ...

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...

A summary of what you need to know about Action potential in myelinated and non-myelinated neurones for your AQA Biology A-level exam.

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

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...

• A chronic inflammation disorder of the airways • Reversible airway obstruction due to: o Bronchial spasm o Airway swelling o Excessive mucous production - ANSWER-What is asthma? • Atopic - extrinsic asthma - most common inflammation mediated by IgE cells • Non-atopic - intrinsic asthma - far less common inflammation mediated by IgE production - this means it is not an ingested allergen - ANSWER-What are the two types of asthma? Salbutamol is a receptor agonist at beta-2 ...

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...

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

These are my notes from my 3-hour 'Introduction to ECGs' Lecture. It involves some basic physiology surrounding myocytes and the contraction the heart, electrolytes and why they are applicable. It then explains depolarisation and repolarisation of the heart and the conduction system of the heart. It then details how to actually read ECG paper and the waves. Further, it explains how and where to place ECG leads and some theory behind this also. At the end is notes on how to recognise different ...