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Where does stimulus occur?
Assuming you are referring to the different types of "environmental stimuli," as in biology, the answer would include many sources. All living things (organisms) respond to environmental stimuli; this is one of the seven key characteristics of living things (including evolution, order, regulation, growth and development, reproduction, and energy utilization). So, for example, our bodies can respond to physical damage by making us aware of it through our feeling of pain. The "fight or flight" response can be triggered by threatening environmental stimuli. Or, a Venus fly trap will snap shut when an insect lands in its trap.
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Answer The "Threshold" just means the point at which something occurs, such as sound. The threshold of a sound would be the volume at which you would first start… to hear the sound.
A response is an action of change in behavior that occurs as a result to a stimulus. The stimulus can be either internal or external.
According to Baddely & Hitch's multi-store model of memory, the store you are most likely referring to is the sensory store, also known as sensory memory. It features a relati…vely unlimited storage capacity, and a very brief duration of retention. Upon reception of a sensory stimulus, it will first be sent here before shortly either, if paid conscious attention to, being transferred to the short-term store, or lost. Different types of sensory information will be stored for varying durations. For example, visual stimuli (iconic memory) will be retained for approximately 0.2-0.4 seconds, and auditory stimuli (echoic memory) will be stored for around 2-4 seconds.
Is the decrease in response to a stimulus that occurs after repeated presentations of the same stimulus?
Habituation - Chapter 9 - development from the Robert Feldman Textbook entitled Essentials of Understanding Psychology
Voltage-gated Na+ channels change shape, and their activation gates open.
The principle that governs this is called the All-or-none Law. The best way to explain how it works may be best illustrated by an analogy. Are you familiar with ho…w a spark of electricity can jump a gap? Or how lighting seems to come down as a huge flash? Both of these are acting very much like what a muscle cell must do to contract. The impulse that triggers either of these is electrical, and so it needs so have a certain amount of charge to be strong enough to jump either the gap between two wires or between the clouds and the ground and crash down as lighting. Just like you can't have just a little bit of lightening, a muscle cannot do just a little bit of contracting, it has to do it all or do none at all. So it waits until the current is strong enough to run the length of its sarcomeres in the myofibrils that make up the muscle cell and it gives it all its got. The reason this may seem counterintuitive is that we rarely ever experience just one single muscle cell contract because they usually act in a group called a motor unit. You can think of a motor unit as a taxi cab service, and when it goes out to do its job it sends all of its taxis (muscle fibers in its company) to do all the work they can. The way you contract a muscle made of many motor units that are made of many individual cells is that the central nervous system select how many motor units (taxi companies) it calls into action. To us it feels like we are using different amounts of effort, but we are just selecting how many companies of taxi cabs (motor units) to call into action. To the taxi cars, themselves, they are all driving around at their highest capacity, just like the all-or-none law says they should.
What is the response to the conditioned stimulus that occurs after the pairing of a conditioned stimulus and an unconditioned stimulus?
You will get a conditioned response. Since i know that this topic can be complicated i'll try and make it a little easier to understand. An unconditioned stimulus is one that …occurs naturally without any kind of training. As an example, look at the innate fears that we have due to evolution. Certain animals, bitter tastes elicit a response (such as running away or spitting out the bitter food). This is the unconditioned response. Another example is the eye blink response. When a puff of air hits your eye, you automatically blink. Now say for example when the puff of air hits your eye, a bell rings (a conditioned stimulus) and you blink. After this connection between the puff of air, the bell and eye blink has been learned, the bell ringing itself will cause you to blink in absence of the air puff. This is the conditioned response as naturally, hearing a bell ring, does not make you blink.
No, "metabolism" is the process of breaking down (food) sugars to power an animal for movement or for the synthesis of new organic chemicals needed by an organism to live and …grow.