Assertion: The sight, smell and presence of food in the oral cavity can stimulate secetion of saliva.
Reason: The activities of the gastro-intestinal tract are only under neutral control for proper coordination of different parts.

Assertion: The sight, smell and presence of food in the oral cavity can stimulate secretion of saliva. Reason: About 70 per cent of the starch is hydrolyzed in oral cavity by salivary amylase.

Assertion: The sight, smell and presence of food in the oral cavity can stimulate secretion of saliva. Reason: About 70 per cent of the starch is hydrolyzed in oral cavity by salivary amylase.

Assertion: The slight, smell and presence of good in the oral cavity can stimulate secretion of saliva. Reason: About 70 per cent of the starch is hydrolyzed in oral cavity by salivary amylase.

Assertion: Endocrine cells present in different parts of the gastro-intestinal tract secrete four major peptide hormones namely gastrin, secretin, CCK and GIP. Reason: These hormones regulates the secretion of digestive juices and help in digestion.