Domanda del libro di testo
Describe the regulation of the cephalic, gastric, and intestinal phases of gastric secretion.
1148
views
Ch. 23 The Digestive System
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 The Human Body: An Orientation24
- Ch. 2 Chemistry Comes Alive25
- Ch. 3 Cells: The Living Units21
- Ch. 4 Tissue: The Living Fabric20
- Ch. 5 The Integumentary System11
- Ch. 6 Bones and Skeletal Tissues19
- Ch. 7 The Skeleton14
- Ch. 8 Joints7
- Ch. 9 Muscles and Muscle Tissue26
- Ch. 10 The Muscular System26
- Ch. 11 Fundamentals of the Nervous System and Nervous Tissue19
- Ch. 12 The Central Nervous System26
- Ch. 13 The Peripheral Nervous System and Reflex Activity32
- Ch. 14 The Autonomic Nervous System19
- Ch. 15 The Special Senses26
- Ch. 16 The Endocrine System23
- Ch. 17 Blood25
- Ch. 18 The Cardiovascular System: The Heart24
- Ch. 19 The Cardiovascular System: Blood Vessels27
- Ch. 20 The Lymphatic System and Lymphoid Organs and Tissues14
- Ch. 21 The Immune System: Innate and Adaptive Body Defenses27
- Ch. 22 The Respiratory System21
- Ch. 23 The Digestive System31
- Ch. 24 Nutrition, Metabolism, and Energy Balance26
- Ch. 25 The Urinary System26
- Ch. 26 Fluid, Electrolyte, and Acid-Base Balance24
- Ch. 27 The Reproductive System24
- Ch. 28 Pregnancy and Human Development25
- Ch. 29 Heredity11
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034Non è quello che usi tu?Cambia libro di testo
Capitolo 23, Problema 22
Describe the role of these cells found in gastric glands: parietal, chief, mucous neck, and enteroendocrine.
Guida verificata passo dopo passo1
Identify the location of the gastric glands in the stomach lining, which contain different specialized cells responsible for digestion and protection.
Explain that parietal cells secrete hydrochloric acid (HCl), which helps create an acidic environment for digestion and activates enzymes, and intrinsic factor, which is essential for vitamin B12 absorption.
Describe chief cells as the producers of pepsinogen, an inactive enzyme that is converted into pepsin in the acidic stomach environment to break down proteins.
Clarify that mucous neck cells secrete mucus that protects the stomach lining from the corrosive effects of acid and digestive enzymes, maintaining the integrity of the stomach wall.
Discuss enteroendocrine cells, which release hormones such as gastrin into the bloodstream to regulate digestive processes, including stimulating acid secretion and gastric motility.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
2mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Parietal Cells
Parietal cells are specialized cells in the gastric glands responsible for secreting hydrochloric acid (HCl), which helps maintain the stomach's acidic environment necessary for digestion. They also produce intrinsic factor, essential for vitamin B12 absorption in the small intestine.
Video consigliato:
Percorso guidato
05:33
Cell Junctions
Chief Cells
Chief cells are gastric gland cells that secrete pepsinogen, an inactive enzyme precursor. Once exposed to the acidic stomach environment, pepsinogen converts into pepsin, an enzyme that breaks down proteins into smaller peptides during digestion.
Video consigliato:
Percorso guidato
05:33Cell Junctions
Mucous Neck and Enteroendocrine Cells
Mucous neck cells produce mucus that protects the stomach lining from acid damage and mechanical injury. Enteroendocrine cells secrete hormones like gastrin, which regulate gastric secretions and motility, coordinating digestive processes.
Video consigliato:
04:19The Head and Neck
Pratica correlata
Domanda del libro di testo
Lara was on a diet but she could not eat less and kept claiming her stomach had a mind of its own. She was joking, but indeed, there is a 'gut brain' called the enteric nervous system. Is it part of the parasympathetic and sympathetic nervous system? Explain.
772
views
Domanda del libro di testo
a. What is the relationship between the cystic, common hepatic, bile, and pancreatic ducts?
b. What is the point of fusion of the bile and pancreatic ducts called?
958
views
Domanda del libro di testo
Describe the two phases of swallowing, noting the organs involved and the activities that occur.
73
views
Domanda del libro di testo
a. Describe the boundaries of the oral cavity.
b. Why do you suppose its mucosa is stratified squamous epithelium rather than the more typical simple columnar epithelium?
108
views
Domanda del libro di testo
Explain why fatty stools result from the absence of bile or pancreatic juice.
1209
views