Stimulus, Taxes, and Tropisms Quiz

6 Questions

What is the difference between taxes and tropisms?

Taxes involve the whole organism's movement, whereas tropisms involve the movement of a specific part of the organism.

Give an example of a positive tax.

Single-celled algae moving towards light (positive phototaxis).

Explain kinesis and how it differs from taxes.

Kinesis is a random movement where the rate of activity is determined by the intensity of the stimulus rather than the direction. Unlike taxes, it is not directional.

What is the role of a receptor in the process of responding to a stimulus?

Receptor detection helps in detecting the stimulus and initiating a response.

Give an example of a negative tropism.

Worms moving away from light (negative phototaxis).

How does light affect movement in an experiment?

Light can be a factor controlling behavior, influencing the movement of organisms.

Study Notes

Stimulus is a change in the internal or external environment that leads to a response, followed by receptor detection, coordination of a response, and effector production.
Taxes are directional movements in response to a stimulus, with positive taxes moving towards the stimulus and negative taxes moving away.
Examples of taxes include single-celled algae moving towards light (positive phototaxis) and worms moving away from light (negative phototaxis).
Kinesis is a random movement where the rate of activity is determined by the intensity of the stimulus rather than the direction.
Differences between taxes and tropisms include taxes involving the whole organism's movement, while tropisms involve the movement of a specific part of the organism.
Tropisms can be positive (growth towards a stimulus) or negative (movement away from a stimulus) like phototropism and gravitropism.
In an experiment, behaviors exhibited by groups suggest factors controlling behavior, such as light affecting movement.