Term
| What digests and absorbs food |
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Definition
| The Alimentary or Gastrointestinal Tract |
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Term
| what parts make up the alimentary canal |
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Definition
| mouth, pharynx, esophagus, stomach, small intestine, and large intestine |
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Term
| Name the 7 accessory digestive organs |
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Definition
| Teeth, Tongue, gallbladder, salivary glands, liver, and pancreas. |
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Term
| " The GI tract is a disassembly line" what does this phrase mean. |
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Definition
| Nutrients become more available to the body in each step. |
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Term
| what are the 6 essential activities of the Digestive Process |
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Definition
| Ingestion, propulsion, mechanical digestion, chemical digestion, absorption, defication. |
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Term
| What takes place during Ingestion? |
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Definition
| Taking food into the digestive tract |
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Term
| What takes place during Propulsion? |
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Definition
| Swallowing and peristalsis |
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Term
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Definition
| Waves of contraction and relaxation of muscles in organ walls |
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Term
| What takes place during mechanical digestion |
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Definition
| Chewing, mixing, and churning food. |
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Term
| what takes place during chemical digestion |
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Definition
| catabolic breakdown of food |
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Term
| what takes place during absorption |
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Definition
| movement from the gastrointestinal tract to the blood or lymps. |
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Term
| What does the regulation of digestion involve? |
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Definition
Mechanical and chemical stimuli – stretch receptors, osmolarity, and presence of substrate in the lumen
Extrinsic control by CNS centers
Intrinsic control by local centers |
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Term
| what do mechano and chemoreceptors respond to? |
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Definition
| stretch receptors,osmolarity, PH, presence of substrate, and end products of digestion |
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Term
| What types of nervous controls exist in the GI tract? |
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Definition
| Intrinsic and Extrinsic Controls |
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Term
| What does the intrinsic control? |
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Definition
Nerve plexuses near the GI tract initiate short reflexes
Short reflexes are mediated by local enteric plexuses (gut brain) |
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Term
| what does the extrinsic control? |
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Definition
Long reflexes arising within or outside the GI tract
CNS centers and extrinsic autonomic nerves |
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