Neurones and synapses Study guides, Class notes & Summaries
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All sample questions with matching correct answer in chapter 5
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negative tropisms - Answer-growth away from a stimulus 
Define homeostasis - Answer-Homeostasis is the regulation of internal conditions in the 
body. It is necessary to maintain optimal conditions for body functioning. These internal 
conditions can change as a result of processes within the body and as external 
conditions change. 
systems responsible for homeostasis - Answer-the nervous system - uses electrical 
impulses to communicate 
the endocrine system - uses chemical molecules to commun...
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Edexcel A-level biology 2023 with complete solutions questions and answers
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Describe the events of fertilisation that occur after the acrosome reaction. 
-Membrane of sperm and egg cell fuse together 
-cortical granules release contents into zona pellucida 
-Zona pellucida thickens 
-Haploid nuclei fuse 
 
 
 
Explain how phospholipids form a cell surface membrane 
-Hydrophilic parts associate with water 
-Hydrophobic parts repel water 
-a bilayer forms with hydrophobic parts pointing in towards the centre of the bilayer 
 
 
 
Describe the role of the CFTR protein in e...
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AQA Biology Paper 2 ALL SOLUTION LATEST EDITION 2023 GUARANTEED GRADE A+
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homeostasis 
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 
A conglomeration of billions of cells specifically designed to provide a communication network within the human body. 
receptors 
Special structures that allow living organisms to sense the conditions of their internal or external environment 
stimuli 
Changes, occurring within or outside the body, that affect...
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AQA BIOLOGY ESSAY TITLES VERSION 2
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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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AQA A Level Biology : Year 2- Nervous Coordination Graded A
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AQA A Level Biology : Year 2- Nervous Coordination Graded A 
What is the value of the resting potential of a neurone? 
Why is the resting potential of a neurone negative? -70mV 
There are more positive ions outside the cell 
than inside 
How is the resting potential maintained? 
actively transports 
3 Na+ out for ever 2 K+ into the neurone 
(ATP Hydrolysed) 
Sodium-potassium pump 
Membrane more permeable to K+ and less permeable to Na+ 
What happens if the sodium ion channels rema...
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5.1.3 Neuronal communication - OCR Biology A level notes (2015-present syllabus)- A* notes
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Detailed A* level notes covering the whole topic of neuronal communication(specification point 5.1.3). This is for the OCR A level Biology A course. These notes cover every single specification point within this topic and are concise but contain everything you need to know. Topics covered: 
- sensory receptors 
- neurones 
- action potentials 
- synapses
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Summary Exam for Biological foundations of mental health 2023
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Summary Exam for Biological 
foundations of mental health 2023 
Striatal Dopamine neurotransmission abnormalities in obesity and addiction - 
CORRECT ANSWER-Such persistent activation of the reward pathway occurs in the 
case of chronic drug abusers or even in individuals consuming unusually large quantity 
of food. 
To answer this question, scientists have quantified dopamine neurotransmission in the 
brains of addicted or obese individuals, using positron emission tomography-- PET. 
They...
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Chapter 10: Endocrine System Martin Caon Examination Questions and Answers in Basic Anatomy and Physiology Third Edition
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Martin Caon Examination Questions and Answers in Basic Anatomy and Physiology Third Edition 
 
Chapter 10: Endocrine System 
10.1	Endocrine System and Hormones in General 
 
1.	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 is B: Hormones are circulating messengers that are transported in blood...
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3.6.2 Synapses Questions And Answers Review Update A+
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(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 across synaptic cleft to post-synaptic 
neurone or effec...
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AQA BIOLOGY ESSAY TITLES and Marking Scheme
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AQA Education (AQA) is a registered charity (number ) and a company limited by guarantee registered in 
England and Wales (number ). Our registered address is AQA, Devas Street, Manchester M15 6EX. 
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 unchan...
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