Domanda del libro di testo
What are fluid shifts? What is their function, and what factors can cause them?
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Ch. 27 Fluids & Electrolytes
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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TOC.tableOfContents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Non è quello che usi tu?Cambia libro di testo
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Martini, Nath, Bartholomew 11th EditionCh. 27 Fluids & ElectrolytesProblema 13
Martini, Nath, Bartholomew 11th EditionCh. 27 Fluids & ElectrolytesProblema 13Capitolo 26, Problema 13
When the pH of body fluids begins to decrease, free amino acids and proteins will
(a) Release a hydrogen from the carboxyl group
(b) Release a hydrogen from the amino group
(c) Release a hydrogen at the carboxyl group
(d) Bind a hydrogen at the amino group
Guida verificata passo dopo passo1
Understand that pH is a measure of hydrogen ion (H\(\textsuperscript{+}\)) concentration, and a decrease in pH means an increase in H\(\textsuperscript{+}\) concentration, making the environment more acidic.
Recall that amino acids and proteins have both amino (\-NH\(\textsubscript{2}\)) and carboxyl (\-COOH) groups, which can act as acids or bases depending on the pH of the environment.
At lower pH (more acidic), amino groups tend to accept hydrogen ions (H\(\textsuperscript{+}\)), becoming positively charged (\-NH\(\textsubscript{3}\)\(\textsuperscript{+}\)), while carboxyl groups tend to remain protonated (\-COOH) and do not release hydrogen ions.
Therefore, when body fluid pH decreases, free amino acids and proteins are more likely to bind hydrogen ions at the amino group rather than releasing hydrogen ions from either group.
Conclude that the correct response is that amino acids and proteins bind a hydrogen at the amino group in response to decreasing pH.
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pH and Body Fluid Acidity
pH measures the acidity or alkalinity of a solution; a decrease in pH means the environment becomes more acidic with more free hydrogen ions (H+). Body fluids maintain a narrow pH range to ensure proper biochemical function, and changes in pH affect the ionization state of molecules like amino acids and proteins.
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Percorso guidato
07:58
pH Scale
Ionizable Groups in Amino Acids and Proteins
Amino acids and proteins contain ionizable groups, mainly the amino (-NH2) and carboxyl (-COOH) groups. These groups can either release or bind hydrogen ions depending on the pH, influencing the molecule's charge and structure. The carboxyl group typically releases H+ in basic conditions, while the amino group can bind H+ in acidic conditions.
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Percorso guidato
04:37Amino Acids
Buffering Role of Amino Acids and Proteins
Amino acids and proteins act as buffers by accepting or donating hydrogen ions to resist pH changes. When pH decreases (more acidic), amino groups tend to bind free hydrogen ions to minimize acidity, helping maintain pH balance in body fluids. This buffering capacity is crucial for physiological stability.
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11:42Amino Acid Oxidation 2
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In a protein buffer system, if the pH increases:
(a) The protein acquires a hydrogen ion from carbonic acid
(b) Hydrogen ions are buffered by hemoglobin molecules
(c) A hydrogen ion is released and a carboxylate ion is formed
(d) A chloride shift occurs
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Drinking a solution hypotonic to the ECF causes the ECF to:
(a) Increase in volume and become hypertonic to the ICF
(b) Decrease in volume and become hypertonic to the ICF
(c) Decrease in volume and become hypotonic to the ICF
(d) Increase in volume and become hypotonic to the ICF
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The osmotic concentration of the ECF decreases if an individual gains water without a corresponding:
(a) Gain of electrolytes
(b) Loss of water
(c) Fluid shift from the ECF to the ICF
(d) All of these
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