1. differentiate between nastic and tropic movement.( 3 points)
2. differentiate between receptors and effectors.(3 points)
plz help...
Tropic movement | Nastic movement |
A tropic movement is the type of biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant induced by some external stimuli. This response is dependent on the direction of the stimulus. | Nastic movement is that type of movement that is not governed by the direction of the stimulus. Whatever be the direction of stimulus, the movements always occur in a particular direction. |
Receptor | Effectors |
Receptors are special structures located on the different parts of the body that are capable of recognizing and receiving messages. | Those cells which produce response after receiving a particular stimulus are known as effectors. |
For example - olfactory receptors for detecting smell, gustatory receptors for detecting taste, etc. | For example- contraction of muscles for movement of different body parts, release of hormones from glands etc. |