Neurones and synapses Study guides, Class notes & Summaries

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...

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...

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...

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...

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

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...

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...

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...

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...

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...