Textbook Question
The glomerular filtration rate is regulated by all of the following, except
(a) Autoregulation
(b) Sympathetic neural control
(c) Cardiac output
(d) Angiotensin II
(e) The hormone ADH
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Ch. 26 The Urinary System
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011
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Table of contents
- 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 and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
Chapter 25, Problem 6
Changing the luminal diameters of the afferent and efferent arterioles to alter the GFR can be an example of
(a) Hormonal regulation
(b) Autonomic regulation
(c) Autoregulation
(d) All of these
Verified step by step guidance1
Step 1: Understand the key terms in the question. The afferent and efferent arterioles are small blood vessels that regulate blood flow into and out of the glomerulus in the kidney, which directly affects the Glomerular Filtration Rate (GFR).
Step 2: Define the types of regulation mentioned: (a) Hormonal regulation involves hormones like angiotensin II or atrial natriuretic peptide affecting arteriole diameter; (b) Autonomic regulation involves nervous system control, such as sympathetic nervous system input; (c) Autoregulation refers to the kidney's intrinsic ability to maintain a stable GFR by adjusting arteriole diameter without external signals.
Step 3: Recognize that changing the luminal diameter of afferent and efferent arterioles to alter GFR can occur through intrinsic mechanisms (autoregulation), hormonal signals, and autonomic nervous system input.
Step 4: Since all three mechanisms can influence arteriole diameter and thus GFR, consider that the correct answer might encompass all these regulatory methods.
Step 5: Conclude that the process described is an example of (d) All of these, because hormonal, autonomic, and autoregulatory mechanisms all contribute to changing arteriole diameter and regulating GFR.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Glomerular Filtration Rate (GFR)
GFR is the rate at which blood is filtered through the glomeruli of the kidneys. It depends on the pressure within the glomerular capillaries, which is influenced by the diameter of afferent and efferent arterioles. Changes in these diameters directly affect filtration efficiency.
Recommended video:
3:15
Glomerular Filtration Rate
Autoregulation of Kidney Function
Autoregulation refers to the kidney's intrinsic ability to maintain a stable GFR despite fluctuations in blood pressure. It involves adjusting the luminal diameter of afferent and efferent arterioles to control blood flow and filtration pressure without external signals.
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1:00The Kidneys Example 1
Hormonal and Autonomic Regulation
Hormonal regulation involves substances like angiotensin II and atrial natriuretic peptide that alter arteriole diameter to influence GFR. Autonomic regulation uses sympathetic nervous system signals to constrict or dilate arterioles, affecting kidney blood flow and filtration.
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Guided course
13:06Review of Major Hormones
Related Practice
Textbook Question
The process of urine formation involves all of the following, except
(a) Filtration of plasma
(b) Reabsorption of water
(c) Reabsorption of certain solutes
(d) Secretion of wastes
(e) Secretion of excess lipoprotein and glucose molecules
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Textbook Question
What are the primary functions of the urinary system?
Textbook Question
Trace the pathway of the protein-free filtrate from where it is produced in the renal corpuscle until it drains into the renal pelvis in the form of urine. (Use arrows to indicate the direction of flow.)
Textbook Question
What are the primary functions of the urinary system?
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Textbook Question
The distal convoluted tubule is an important site for
(a) Active secretion of ions
(b) Active secretion of acids and other materials
(c) Selective reabsorption of sodium ions from the tubular fluid
(d) All of these