Domanda del libro di testo
Decreased blood calcium level would result in increased:
(a) Secretion of calcitonin
(b) Secretion of PTH
(c) Elimination of calcium by the kidneys
(d) Osteoclast activity
(e) Excitability of neural membranes
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Ch. 18 The Endocrine System
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy & PhysiologyISBN: 9780137854011
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TOC.tableOfContents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- 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 Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy & PhysiologyISBN: 9780137854011Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 19
In what ways can a hormone modify the activities of its target cells?
Guida verificata passo dopo passo1
Understand that hormones modify the activities of their target cells by binding to specific receptors either on the cell surface or inside the cell, depending on the hormone type.
Recognize that once the hormone binds to its receptor, it can trigger a cascade of intracellular events that alter the cell's function, such as activating or inhibiting enzymes, opening ion channels, or changing gene expression.
For peptide or protein hormones, which are generally water-soluble, the hormone binds to membrane receptors and activates second messenger systems (e.g., cAMP), leading to rapid changes in cell activity.
For steroid hormones, which are lipid-soluble, the hormone typically crosses the cell membrane and binds to intracellular receptors, directly influencing gene transcription and protein synthesis, resulting in longer-term effects.
Summarize that hormone effects can include altering membrane permeability, stimulating synthesis of proteins or enzymes, activating or deactivating enzymes, inducing secretory activity, or promoting mitosis, all of which modify the target cell's activity.
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Hormone-Receptor Interaction
Hormones modify target cell activities by binding to specific receptors on or inside the cell. This binding triggers a cascade of cellular events, ensuring that only cells with the appropriate receptors respond to the hormone.
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Review of Major Hormones
Signal Transduction Pathways
Once a hormone binds to its receptor, it activates signal transduction pathways that convert the extracellular hormone signal into intracellular actions. These pathways often involve second messengers like cAMP, leading to changes in enzyme activity or gene expression.
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Percorso guidato
4:40Alternative Pathway
Cellular Responses to Hormones
Hormones can alter target cell activities by changing membrane permeability, stimulating protein synthesis, activating or inhibiting enzymes, or modifying gene expression. These responses adjust the cell’s function to meet physiological needs.
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13:06Review of Major Hormones
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