DIGESTION N ABSORPTION
this a for the course of human digestive system
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DIGESTION N ABSORPTION - Marcador
DIGESTION N ABSORPTION - Detalles
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Preguntas:
75 preguntas
| 🇬🇧 | 🇬🇧 |
| Major components of food | Carbs protein n fats |
| What are required in small quantities ? | Mineral n water |
| What does food provide us with n for what ? | *energy n organic material *growth n repair of tissue |
| Role of water in our body ? | *metabolic processes *prevents dehydration of the body |
| What is digestion ? | Complex food --------------> simple ABSORBABLE form |
| Digestion is carried out by which 2 methods ? | Mechanical n biochemical methods |
| The mouth first leads to ? | Oral /buccal cavity |
| What does oral cavity contains ? | Teeth , tongue |
| Characteristics of human teeth | *thecodont *diphyodont *heterodont |
| Different type of dentation ? | Incisors , canine , premolars , molars |
| Dental formula for adults | 2123/2123 |
| What does enamel help in ? | Mastication of food |
| What is epiglottis made up of ? | Cartilaginous flap |
| Opening of windpipe | Glottis |
| Sphincter that regulates opening of oesophagus into stomach ? | Gastro-oesophageal sphincter |
| Where is stomach located ? | Upper left portion of abdominal cavity |
| Parts of stomach | Cardiac fundus body pyloric |
| Parts of small intestine | *duodenum *jejunum *ileum |
| Points on caecum | *small blind sac *hosts symbiotic microorganism |
| Shape of vermiform appendix | Narrow finger like tubular projections |
| Parts of colon ? | Ascending transverse descending n sigmoid |
| Which parts open into rectum | Sigmoid / descending |
| Layers of alimentary canal | *serosa *muscularis *sub mucosa *mucosa |
| Serosa made up of ? | *smooth muscles *thin mesothelium |
| Mesothelium ? | Epithelium of visceral organs |
| Muscularis is made up of ? | Smooth muscles arranged into *inner circular *outer longitudinal |
| Sub mucosal layer is formed of ? | Loose connective tissues with nerves blood n lymph vessels |
| What does mucosa form in stomach ? | Irregualr folds (rugae) n villi (finger like projections ) |
| Which modification increases the surface area ? | Brush border appearnce in small intestine |
| What are villi supplied with ? | Network of capillaries n lacteals (large lymph vessels ) |
| What does goblet cells of mucosal epithelium secrete | Mucus (lubrication) |
| Glands by mucosa | Gastric gland --- stomach crypts of lei ----small intestine (crypts r btw villi bases ) |
| The three salivary glands | *parotids---cheek *sub maxillary/ mandible ---lower jaw *sub lingual---below tongue |
| Weight of liver | 1.2 to 1.5 kg |
| Position of liver in the body ? | Abdominal cavity just below diaphragm |
| The structural n functional units of liver ? | Hepatic lobules |
| Each lobule is covered in ? | Glissons capsule (thin connective tissue sheath) |
| Bile is secreted by ? | Hepatic cells |
| Bile is stored n conc in ? | Gall bladder |
| Gall bladder is ? | Thin muscular sac |
| What forms the common bile duct ? | Cystic duct + hepatic duct |
| Bile +pancreatic duct is ? | Common hepato-pancreatic duct |
| Common hepato pancreatic duct is gaurded by ? | Sphincter of oddi |
| Where is pancreas situated ? | Btw the limbs of c shaped duodenum |
| Process of digestion is accomplished by ? | Mechanical n chemical process |
| Function of buccal cavity | *mastication of food *facilitation of swallowing |
| Function of teeth n tongue ? | With saliva masticate n mix up the food thoroughly |
| Fucntion of mucus in saliva ? | Lubricating n adhering the masticated food into bolus |
| The act of swallowing | Deglutition |
| Movement thru which bolus passes down ? | Peristalsis |
| Components of saliva | *electrolytes(Na , K , Cl,HCO3) *salivary enzymes *lysozyme |
| Role of lysozyme in saliva | Antibacterial agent that prevents infection |
| The 3 cells of gastric gland | *mucus neck cell *peptic or chief cell *parietal or oxyntic cell |
| Peptic or chief cells secrete | Pepsinogen |
| Parietal or oxyntic cell | HCl n intrinsic factors |
| What is chyme ? | Bolus mixed with acidic gastric juice n churned |