9-1: Why are human psychologists concerned with human biology? Psychologists working from a biological perspective study the links between biology and behavior. We are biopsychosocial systems, in which biological, psychological and social-cultural factors interact to influence behavior.
9-2: What are the parts of a neuron and how are neural impulses generated? Neurons are the elementary components of the nervous system, the body 's speedy electrochemical information system. A neuron receives signals through the branching dendrites, and sends signals through its axons. Some axons are encased in a myelin sheath, which enables faster transmission. If the combined receive signals exceed a minimum threshold, the neuron fires, transmitting an electrical impulse (action potential) down it 's axon by means of the chemistry to electricity process. The neuron 's reaction is an all or none process.
9-3: How do nerve cells communicate with other nerve cells? When the action potentials reach the end of an axon (the axon terminals), they stimulate the release of neurotransmitters. These chemical messengers carry a message from the sending neuron across the synapse to receptor sites on a receiving neuron. The sending neuron, in a process called reuptake, then reabsorbs the excess neurotransmitter molecules in the synaptic gap. If incoming signals are strong enough, the receiving neuron generates its own actions potential and relays the message to other incoming cells.
9-4: How do
Neurons, nerve cells, have three basic parts: the cell body, dendrites, and axon. Neurons transmit signals to other nerve cells and throughout the body. They are simple components in the nervous system. The cell body includes the nucleus, which is the control center of the neuron. The dendrite branches off the cell body and receives information. The axon is attached to the cell body and sends information away from the cell body to other cells. When the axon goes through myelination, the axon part of the neuron becomes covered and insulated with fat cells, myelin sheath. This increases the speed and efficiency of information processing in the nervous system. Synapse are gaps between neurons, this is where connections between the axons and dendrites.
As well as these there are also the axon of the cell which is covered in myelin sheaths which carried information away from the cell body and hands the action potentials, these are small short bursts of change in the electrical charge of the axon membrane through openings of ion channels, off to the following neurons dendrites through terminal buttons at the end of the axons. Whenever an action potential is passed through these terminal buttons it releases a chemicals that pass on the action potential on to the next neuron through the terminal button and dendrite connection. The chemicals that are
Describe the process of synaptic transmission. Include in this description the differences between excitatory and inhibitory transmitters.Sypnaptic transmission is the method in which obe nerve cell communicate to another nerve cell .The communication between nerve cells is done by branching or processing the nerve cell singnals that are passed by t have e nerve cell body or "soma", dentristes, and electrical axon or chemical signals
1. Neurons is a basic building block of the nervous system. The sensory nerves carry the message from body tissues to the brain and spinal chord to be processed. The motor neurons are then used to send instructions to the body tissue from the brain and spinal cord. Dendrites, which are connected to the body cell (soma) receive information and pass it through the axon. Myelin sheath covers the axon and helps speed the process. When triggered by a signals from our senses or other neurons, the neuron fires an impulse called the action potential. The resting potential is the neuron’s visual charge of positive
Neurons are nerve cells that transmit nerve signals to and from the brain at up to 200 mph. The neuron consists of a cell body (or soma) with branching dendrites(signal receivers) and a projection called
Biological psychology, of biopsychology, is the application of the principles of biology to the study of mental processes in terms of bodily mechanisms. The view that psychological processes have biological (or physiological) correlates, is the basic assumption of the whole field of biological psychology. Biological psychology is a hopeful domain, one that has much to offer in terms of improving the quality of life of the healthy as well as those suffering from disorders. It also contributed important therapeutic data on a variety of conditions, including: Parkinson 's Disease, Alzheimer 's Disease, Clinical depression, Schizophrenia and a lot others. Humans have very complex nervous system, they use neurons and neurotransmitters to make the highest active communication network throughout the body. “most of the body’s neurons are found in the central nervous system(CNS), which consists of the brain and spinal cord” (psychology 5th edition). “Neuroscience emphasizes that the brain and nervous system are central to understanding behavior, thought, and emotion. (Van Horn, 2014; Zhao & others, 2014). Therefore, for biological psychologist all that is psychological is first physiological. All thoughts, feeling & behavior ultimately have a biological cause.” We are benefited from biological approach for diagnosing and treating human brains Ex. Schizophrenia. Scientists are also able to create medications for different types of illnesses. Besides having psychologists
The biological approach focuses on both the physiological and evolutionary aspects which explain human behaviour.
Whether it is the study of biopsychology and other fields of psychology or neuroscience, all psychologists and scientists are trying to understand the functions of the brain. The body and mind connection and how it reacts to certain behaviors or illnesses. Most all psychological functioning can be reduced to underlying brain processes. This should serve as reason alone as to why biology plays an important part in the study of psychology. Psychological factors play a role in whether a person develops a mental illness and in how well they recover from a mental illness, yet biological and genetic risk factors, or predispositions, are
Once in the synapses, the impulses triggers the release of chemical messages called neurotransmitters; which then bind to receptors on the receiving cell as the transmission of the impulse repeated again. The message or impulse continues traveling from one neuron to the next throughout the body until it reaches its destination as it relays a signal. All of this activity happens in less than a split second and without conscious thought. At the end of this process, the brain has the task of interpreting the message and making the decision as to what to do with this new information. (Carlson, 2011.Pg.45-52)
Neurons communicate with each other through an electrochemical process in three steps (Stufflebeam, 2008). An electrical impulse will travel down the axon to axon terminals. This causes the vesicles to open and neurotransmitter molecules are released into the synaptic gap. Neurotransmitter molecules then cross the synaptic gap and enters the receptor sites located on the dendrites of the receiving neuron. The information is carried along axons and dendrites because of changes in electrical properties which we call action potential. An action potential is initiated when a messenger attaches itself to a receptor. This occurrence causes an electrical signal to be triggered and is generated through the neuron. Once the signal reaches the end of an axon, which is at the end of a neuron, a neurotransmitter molecule will return to the synaptic gap where they are received by the sending neuron and the process is repeated or are destroyed by enzymes (Griggs, 2014, p. 41-45).
Neurons (also known as neurons, nerve cells and nerve fibers) are electrically excitable and the most important cells in the nervous system that functions to process and transmit information. Neurons have a large number of extensions called dendrites. They often look likes branches or spikes extending out from the cell body. It is primarily the surfaces of the dendrites that receive chemical messages from other neurons.
The first thing I’m going to talk about are the neurons. (Dendrites)-The Dendrites of the Neuron are the segments of the Neuron that receive Stimulation in order for the cell to become active. They conduct electrical messages to the Neuron cell body for the cell to function.
The Biological Perspective: This is the study of exactly how the physical events within the physical body interact with the events in the external environment. This is expressed by our perceptions, memories, behaviors and interactions with everything around us. We can think about our heredity and genetic makeup and the influences that has on each one of us as an individual. Then think about the stress of poor health and illness and how we may express our emotions with those around us. Since we are diverse as individuals we rely on our physiological make up and the stimuli of our environment to adapt to each situation. This human biology helps us to constantly adapt and survive in an ever-changing world.
Human brain consists of billions of cells interconnected together, with each performing its separate functions. It consists of two explicit categories of nerves: neurons and glia cells. Neuron is a single nerve cell in the entire nervous system; which is electrically excitable cell that carries information after being processed via chemical or electrical signals. One of its key characteristics is that it does not undergo cell division. In addition, it maintains a voltage gradient for all the neurons across its membranes. Glia cells, on the other hand, its functionality is to maintain homeostasis.
Nerve cells generate electrical signals to transmit information. Neurons are not necessarily intrinsically great electrical conductors, however, they have evolved specialized mechanisms for propagating signals based on the flow of ions across their membranes.