When you walk into the Mess Hall and smell the wonderful lun

When you walk into the Mess Hall and smell the wonderful lunch of com dogs and fries you start to salivate Construct a diagram to show, the components of the anticipatory reflex are that lads to this response and explain why it is important for the efficient digestion of this meal.

Solution

Smell of food - positive effect on salivary centres - positive effect on saliva production - transmission mechanisms (adrenergic, noradrenergic, cholinergic ) - effect on major and minor glands - acinar cells produce mucin, enzymes and water , duct cells produces electrolytes, and pathways such as synergism and addition - results in dilation of blood vessels, myoepethelial cell contraction .

In mouth mastication result in mechanic digestion of food along with saliva contact. Salivary glands results in secretion of saliva which contains enzyme salivary amylase which is necessary for digestion of starch present in food. Saliva also helps in lubrication of the food and also a component named hydrogen carbonate maintains the pH by keeping it alkaline which is the ideal condition for working of amylase enzyme. After this process, food is converted into a bolus which then passes on to esophagus and then stomach.