Neurones and synapses Study guides, Study notes & Summaries
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Biology GCSE AQA - Keywords - Paper 2 summary 2022
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Biology GCSE AQA - Keywords - Paper 
2 summary 2022 
Homeostasis - ANS-A tendency to maintain a balanced or constant internal state; the 
regulation of any aspect of body chemistry, such as blood glucose, around a 
particular level 
nervous system - ANS-A conglomeration of billions of cells specifically designed to 
provide a communication network within the human body. 
receptors - ANS-Special structures that allow living organisms to sense the 
conditions of their internal or external env...
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Edexcel A level Biology with 100% correct questions and and answers
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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...
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3.6.2 Synapses Questions And Answers Review Update A+
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3.6.2 Synapses Questions And Answers Review 
Update A+ 
(synapses) inhibitory neurotransmitters - ANS-hyperpolarise postsynaptic membrane so 
potential difference is more negative, preventing an action potential from firing / eg 
GABA opens Cl- channels so hyperpolarises membrane 
(synapses) synapse definition - ANS-a junction between neurones and effectors 
(synapses) process - ANS-action potential reaches pre-synaptic knob and triggers 
release of neurotransmitters from vesicles / diffuse a...
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3.6.2 Synapses Questions And Answers Review Update A+
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3.6.2 Synapses Questions And Answers Review 
Update A+ 
(synapses) inhibitory neurotransmitters - ANS-hyperpolarise postsynaptic membrane so 
potential difference is more negative, preventing an action potential from firing / eg 
GABA opens Cl- channels so hyperpolarises membrane 
(synapses) synapse definition - ANS-a junction between neurones and effectors 
(synapses) process - ANS-action potential reaches pre-synaptic knob and triggers 
release of neurotransmitters from vesicles / diffuse a...
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Endocrine System MCQ QUESTIONS 100% correct Answers
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Which statement below about hormones is true? 
A. Hormones are enzymes that catalyse reactions 
B. Hormones are released into the blood circulation 
C. Hormones affect all cells of the body 
D. Hormones are released by neurones at synapses - answer-B 
Which hormones are soluble in blood? 
A. Steroid hormones 
B. Hormones produced by the adrenal cortex 
C. The sex hormones 
D. Those released by the pituitary gland - answer-D 
Which statement about the hypothalamus is correct? 
A. The hypothalamus...
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Neurones Notes
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Notes containing detailed information about the Pancinian Corpuscle, Neurones, Nervous Transmission and Synapses, corresponding to information from the OCR Biology A textbook
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BIOL 235: Chapter 12, questions and answers| Latest updated
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BIOL 235: Chapter 12, questions and answers| Latest updated 
nerve 
a bundle of hundreds of thousands of axons plus associated connective tissue and blood vessels that lies outside of brain and spinal cord (in the PNS) 
 
 
 
cranial nerves 
21 pairs emerge from the brain 
 
 
 
spinal nerves 
31 pairs emerge from the spinal cord 
 
 
 
ganglia 
small masses of nerve tissue, consisting primarily of neuron cell bodies, located outside the CNS 
 
 
 
enteric plexuses 
extensive networks of neurons...
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AQA A-Level Biology Paper 2
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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...
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GCSE AQA Biology Paper 2 2022 Foundation
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Homeostasis 
The regulation of the conditions inside your body and cells to maintain a good internal environment 
 
 
Receptors 
detect stimuli 
 
 
 
 
 
 
00:37 
01:38 
Coordination centre 
Receives and processes the information from the receptors then organises a response 
 
 
Effectors 
Producers a response to counteract change and restore optimal conditions 
 
 
What are the 3 things maintained by homeostasis? 
Body temperature, blood glucose levels, water content 
 
 
What are neurones? 
C...
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Biology essay titles
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AQA BIOLOGY ESSAY TITLES VERSION 2 
 
 
 
 
 
 
 
 
 
 
 
Biology essay titles 
 
Version 2 
 
 
 
 
This document contains the essay titles and mark schemes used in AQA A-level Biology examinations since 2007. The specifications these exam questions came from are no longer in use, but the marking method has largely remained unchanged. Further guidance on the marking method used with the essay can be found in Paper 3 Essay marking guidance. 
 
 
Year	Questio	nTitle 
7402/3 
2017	7.1	The impo...
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