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Questions and Answers
The parotid glands are traversed by the facial nerve (VII cranial nerve).
True
Saliva contains 85% water.
True
Ptialin or salivary amylase is responsible for the primary degradation of proteins.
False
Lysozyme in saliva has antimicrobial properties.
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The liver's function is to form bile to emulsify carbohydrates.
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The gallbladder stores bile.
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The pancreas produces both pancreatic juice and insulin.
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Holozoic organisms primarily include carnivores and herbivores.
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Saprophytic organisms live off decaying organic matter.
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The common bile duct is part of the liver.
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Study Notes
Types of Digestive Systems
- Complete: Has 2 openings (one for entrance and one for exit) - mouth and anus
- Incomplete: Has 1 opening (serves as both entrance and exit) - mouth = anus
Types of Digestion
- Intracellular: Digestion occurs inside the cell
- Extracellular: Digestion occurs outside the cell
- Mixed: Some organisms have both intracellular and extracellular digestion (first extracellular, then intracellular)
Heterotrophic Organisms
- Include animals and protozoa
- Most animals (carnivorous, herbivorous, omnivorous)
- Live on organic matter in decay
- Do not confuse with intracellular parasites
Fungi
- Micorrhiza system: enzymes are secreted by the mushroom, which is being digested by glucocorro
Porifera
- Food enters the osculum and then goes through the digestive system to be digested intracellually
Protozoa
- Different digestive processes: cell takes in food and then excretes waste
- Examples: Ameba, pseudoporo, and another unnamed organism
Glands and Saliva
Salivary Glands
- Sublingual
- Submaxillary
- Parotid: traversed by the facial nerve (VII)
Composition of Saliva
- Water (85%)
- Enzymes:
- Ptialin or salivary amylase: primary degradation of starch or carbohydrates
- Lysosome: antimicrobial (molecule that kills bacteria)
Function of Saliva
- Formation of the food bolus
- Protection through lysosome
Liver
Function: to form bile (emulsify fats)
- Stores bile: Gallbladder
Stomach
- Hepatic duct
- Common bile duct
- Pancreas
Pancreas
Function: forms pancreatic juice
Enzymes:
- Lipase
- Amylase
- Trypsin
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Description
Assess your knowledge of digestive systems, including types of digestive systems and digestion processes.
