CO ORDINATION IN LIFE PROCESS
1-Amylase breaks starch into sugars (glucose).
2-Animals which are active during nights are called nocturnal animals.
3-Animals which are active during day are called diurnal animals.
4- Increasing ghrelin levels results in sensation of hunger.
5- pH beyond ‘7’ is alkaline and below ‘7’ is acidic.
6-Nervous system in digestive system is often called as second brain.
7-Saliva secreted by salivary glands changes the medium to alkaline.
8-Pavlov conducted experiments on conditional reflexes
9-The formula of teeth is 2:1:2:3 (incisors, canines, premolars, molars).
10-Leptin suppresses hunger.
11-The grinding and chewing of food by tooth is called mastication.
12- Ville which are present on in surface of small intestine absorb the digested food.
13-Peristalsis movement is controlled by autonomous nervous system.
14-The 5th cranial nerve controls the movement of muscles in the jaw.
15-Production of secretin and cholecystokinin stimulate to release of pancreatic juice, bile juice and succus
16-Saliva secretion and movements in digestive system are under the action of autonomous nervous system.
17-The chemo receptors in nose are also called olfactory receptors.
18- Food forms into bolus as a result of chewing.
19-The motion that propels the bolus into stomach is called peristalsis.
20-Emptying of stomach takes place in 4-5 hrs and small intestine is 30-40 hrs.
21- Reverse peristalsis occurs in ruminants (cow, buffalo).
22. Mucus lubricates and protects the walls of oesophagus.
23-Pyloric sphincter is present at the opening of stomach and duodenum.
24-Digestive juices turn the food into chime.
25-The burning and belching sensation in stomach is due to the secretion of HCL.
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