A2 Personal Target Grade: People always say to be careful when in A2 and not do so many retakes as you may spend less time on the A2 units which is worth more but at the same time I need an A grade and if j can improve the Unit 2 mark. This thread may be a little early but I'm sure by now it would be worrying if not people know whether or not they will carry on Sociology for A2 We are officially the last year to do the old spec thank god! B A2 Personal Target Grade:
Getting On Your Nerves: Neurones and Drug Mode of Action The people: Avengers is the most ambitious crossover event in history Me: Biological psychology assumes that behaviour comes from our biology — that is, our genes, hormones, brain structure etc — and one of the behaviours that it explains is how the body can become addicted.
There are two types of nervous system clusters of nervesthe other being the Peripheral Nervous System. The CNS consists of the brain and the spinal cord and is pretty much where all communication and decisions occur since messages are sent around the body from the CNS.
Nerves are made up of bundles of specialised cells called neurones. A neuron is pictured below: They receive impulses from the neuron before in a process called neurotransmission.
The cell body contains a nucleus, which has the information for the cell.
The length of a neuron is called an axon, made up of insulating myelin sheath. Gaps within it are called nodes of Ranvier — electrical impulses jump along these.
At the end of the neuron there are axon terminals where neurotransmission takes place over a synapse. So now you know about the structure of a neuron, the next thing to learn is how messages are passed between them.
Imagine a nerve made up of two neurons. The pre-synaptic neuron is stimulated and action potential is reached. This is kind of like an electrical impulse that travels down the axon towards the terminals. Between two neurons, there is a gap called the synapse.
Neurotransmission is sometimes referred to as synaptic transmission, so it kind of makes sense why the first neuron is called the pre-synaptic neuron. At one end of the presynaptic neuron, where the terminals are, there are neurotransmitters chemical messages in vesicles, which essentially just contain them.
When the action potential stimulates the vesicles, they then fuse with the terminal button and release neurotransmitters into the synaptic gap. On the post-synaptic neuron, there are specific receptor sites on the dendrites that the neurotransmitters are attracted to.
The lock and key model is important here; a certain neurotransmitter can only bind to a complementary receptor site.Disappointment gift essay pti peshawar jalsa analysis essay aqa psychology unit 3 essay plans, uid cards essay writing.
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In order to cover the topic in sufficient depth, and because students can answer questions on only one Unit 3 topic in the examination, it is expected that students will be taught one topic only. The options are: • • • • Beliefs in Society Global Development Mass Media Power and Politics.
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