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What causes response in an organism?
A change in the environment is the stimulus; the reaction of the organism to it is the response.
What are organism responses examples?
A dog salivating at the smell of food, a flower opening in sunlight and a worm crawling towards moisture are examples of organisms responding to stimuli from their surroundings. All organisms respond to their surroundings in order to improve their chances of survival and reproduction.
What do you call the ability of an organism to respond to stimuli?
The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity (excitability).
What is a response in biology?
A response is a change in the organism resulting from the detection of a stimulus.
What is stimulation in biology?
(Science: physiology) To excite; to irritate; especially, to excite the activity of (a nerve or an irritable muscle), as by electricity.
What helps us to respond to such signals?
Answer: Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus.
Which of these can respond to stimuli?
Answer: Stimuli- it is a sensation which is felt by organisms which are living. Explanation: from above , only plant can respond to stimuli .
What is something that causes a response in an organism?
Stimulus: Something that can elicit or evoke a response in a cell, a tissue, or an organism. Response: A reaction to a specific stimulus. Example : The body temperature is raised by the release of chemicals in white blood cells.
What is an example of an organism’s response to a stimulus?
Orthokinesis is the increased or decreased speed of movement of an organism in response to a stimulus. Woodlice, for example, increase their speed of movement when exposed to high or low temperatures. This movement, although random, increases the probability that the insect spends less time in the unfavorable environment. Another example is klinokinesis , an increase in turning behaviors.
What do organisms respond to a stimulus?
All living organisms need to respond to changes in the environment. Although this happens in different ways the pattern of events is always the same: Plants can also respond to stimuli but the response is usually slower than that of animals. Receptors are specialised cells that detect a stimulus.
What organisms can respond to stimuli?
– When an external stimulus causes input in the form of taste, glands may secrete saliva to make digestion easier. In addition, people sweat in response to heat and the adrenal glands secrete adrenaline in response to fear. – As the brain processed nervous system input, EEG brain waves occur when it receives action potentials.