Domanda del libro di testo
Name the six functional activities of the digestive system.
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Ch. 23 The Digestive System
Marieb, Hoehn11th EditionHuman Anatomy & PhysiologyISBN: 9780136874034
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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 14
Trace the path of a single protein molecule that has been ingested.
The protein molecule will be digested by enzymes made by
a. The mouth, stomach, and colon
b. The stomach, liver, and small intestine
c. The small intestine, mouth, and liver
d. The pancreas, stomach, and small intestine
Guida verificata passo dopo passo1
Step 1: Understand the process of protein digestion, which involves breaking down proteins into smaller peptides and amino acids by specific enzymes produced in different organs.
Step 2: Identify the organs involved in protein digestion. The mouth primarily uses mechanical digestion and saliva, which contains amylase for carbohydrates but not enzymes for protein digestion.
Step 3: Recognize that the stomach produces pepsin, an enzyme that begins protein digestion by breaking proteins into smaller peptides.
Step 4: Know that the pancreas secretes proteolytic enzymes like trypsin and chymotrypsin into the small intestine, where most protein digestion occurs.
Step 5: Understand that the liver produces bile, which aids fat digestion but does not produce enzymes for protein digestion, and the colon mainly absorbs water and electrolytes, not involved in protein digestion.
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Protein Digestion Process
Protein digestion begins in the stomach where enzymes like pepsin break proteins into smaller peptides. This process continues in the small intestine with enzymes such as trypsin and chymotrypsin from the pancreas, further breaking peptides into amino acids for absorption.
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Percorso guidato
02:50
Proteins
Role of Digestive Organs and Enzymes
Different organs contribute specific enzymes for digestion: the stomach produces pepsin, the pancreas secretes proteases like trypsin, and the small intestine completes digestion and absorbs nutrients. The liver produces bile but does not secrete protein-digesting enzymes.
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6:28Organs of the Digestive System
Pathway of Ingested Protein Molecule
An ingested protein molecule travels from the mouth (mechanical digestion), to the stomach (chemical digestion by pepsin), then to the small intestine where pancreatic enzymes finish digestion. The colon mainly absorbs water and does not digest proteins.
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Percorso guidato
4:40Alternative Pathway
Pratica correlata
Domanda del libro di testo
Trace the path of a single protein molecule that has been ingested.
The protein molecule must be digested before it can be transported to and utilized by the cells because
a. Protein is only useful directly
b. Protein has a low pH
c. Proteins in the circulating blood produce an adverse osmotic pressure
d. The protein is too large to be readily absorbed
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Domanda del libro di testo
Trace the path of a single protein molecule that has been ingested.
Before the blood carrying the products of protein digestion reaches the heart, it first passes through capillary networks in:
a. The spleen
b. The lungs
c. The liver
d. The brain
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Domanda del libro di testo
Make a simple line drawing of the organs of the alimentary canal and label each organ. Then add three labels to your drawing—salivary glands, liver, and pancreas—and use arrows to show where each of these organs empties its secretions into the alimentary canal.
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Domanda del libro di testo
Someone has eaten a meal of buttered toast, cream, and eggs. Which of the following would you expect to happen?
a. Compared to the period shortly after the meal, gastric motility and secretion of HCl decrease when the food reaches the duodenum
b. Gastric motility increases even as the person is chewing the food (before swallowing)
c. Fat will be emulsified in the duodenum by the action of bile
d. All of these
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Domanda del libro di testo
a. What is the normal number of permanent teeth? Of deciduous teeth?
b. What substance covers the tooth crown? Its root?
c. What substance makes up the bulk of a tooth?
d. What and where is pulp?
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