Table of Contents
What is a cell that is sensitive to a stimulus?
Receptors are groups of specialised cells. They can detect a change in the environment (stimulus ) and produce electrical impulses in response. Sense organs contain groups of receptors that respond to specific stimuli .
What are the 4 types of stimuli?
Broadly, sensory receptors respond to one of four primary stimuli:
- Chemicals (chemoreceptors)
- Temperature (thermoreceptors)
- Pressure (mechanoreceptors)
- Light (photoreceptors)
What are the types of stimulus?
There are two main types of stimulus –the external stimulus and the internal stimulus.
What is the structure process stimuli?
Sensation processing: The brain has dedicated areas to the processing of stimuli, including: (a) thalamus and (b) the auditory, visual and somatosensory processing regions.
What is meant by stimulus and sensitivity?
:- Stimulus is an agent that bring about a behavioral or physiological change in the body. :- Sensitivity is the measure for how strong a stimulus has to be, before a system reacts to it.
Is a cellular structure that can detect a specific stimulus?
In one, a neuron works with a sensory receptor, a cell, or cell process that is specialized to engage with and detect a specific stimulus. Stimulation of the sensory receptor activates the associated afferent neuron, which carries information about the stimulus to the central nervous system.
What is an example of a response to a stimulus?
What is a response? Response: how the organism reacts to a stimulus and results in a change in behavior. (It is a fancy way of saying “effect”.) Example: Getting a drink when you are thirsty.
What cellular structure detect stimuli and send information to the control center?
The receptor senses environmental stimuli, sending the information to the integrating center. The integrating center, generally a region of the brain called the hypothalamus, signals an effector (e.g. muscles or an organ ) to respond to the stimuli.
What is sensitivity or response to stimuli?
In physiology, a stimulus is a detectable change in the physical or chemical structure of an organism’s internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity (excitability).
Is the Behaviour for a stimulus?
In behavioral psychology (i.e., classical and operant conditioning), a stimulus constitutes the basis for behavior. The stimulus–response model emphasizes the relation between stimulus and behavior rather than an animal’s internal processes (i.e., in the nervous system).
What is a cellular structure that can detect a specific stimulus?
What happens when a stimulus is detected by a sensory receptor?
When a stimulus is detected by a sensory receptor, it can elicit a reflex via stimulus transduction. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response.
What is the difference between perception and sensory activation?
A sensory activation occurs when a physical or chemical stimulus is processed into a neural signal (sensory transduction) by a sensory receptor. Perception is an individual interpretation of a sensation and is a brain function. Humans have special senses: olfaction, gustation, equilibrium, and hearing, plus the general senses of somatosensation.
How are receptors sensitive to mechanical and thermal changes?
Other transmembrane proteins, which are not accurately called receptors, are sensitive to mechanical or thermal changes. Physical changes in these proteins increase ion flow across the membrane, and can generate a graded potential in the sensory neurons.
How does the central nervous system respond to a stimulus?
The stimulus causes the sensory cell to produce an action potential that is relayed into the central nervous system (CNS), where it is integrated with other sensory information—or sometimes higher cognitive functions—to become a conscious perception of that stimulus. The central integration may then lead to a motor response.