Question

Environmental change that triggers a definite action on the part of the organism serves as a(n) _____. stimulus response effector

Answer 1

Answer;

-Stimulus

Environmental change that triggers a definite action on the part of the organism serves as a stimulus.

Explanation;

-A stimulus (plural stimuli) is a detectable change in the internal or external environment.

-A stimulus can be internal or external. Sense organs, such as the ear, and sensory receptors, such as those in the skin, are sensitive to external stimuli such as sound and touch. For instance;  A tropism is a response that an organism makes to a stimulus. An example of a common tropism in plants is phototropism.  Plants grow towards light sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.

Answer 2

In biology, any change that t riggers a definite action from the organism is known as a stimulus. The response is the action that is carried out as a result of the stimulus and the effector is the muscle or muscles that are involved in bringing about the specific response. For example, in the case of touching a hot stove, the heat is the stimulus, the response is the j erking of the hand away from the stove and the effector muscles are those that are in the arm.