When you smell a favourite food your mouth begins to water(that is, you secrete saliva). Write down what the following are examples of:(a) the smell of the food (b) the cells in your nasal passages which perceive the smell(c) the gland which is stimulated to secrete saliva.
(a) The smell of the food is an example of Stimulus.
(b) The cell in your nasal passages which perceive the smell is an example of Olfactory receptors.
Volatile chemical substances suspended in the air is the stimuli for the smell. These molecules stimulate the olfactory receptors.
(c) The gland which is stimulated to secrete saliva is an example of Salivary gland (effector).
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