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Anti-diuretic hormone (ADH) - The role of the kidneys in homeostasis – WJEC - GCSE Biology (Single Science) Revision - WJEC - BBC Bitesize

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Revise the structure of the excretory system including the kidney and the nephrons. How can dialysis or transplantation help when our kidneys fail?

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Biology - How the Kidneys Work - (Kidneys Part 1/3)

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Biology - Structure of the Kidneys - (Kidneys Part 2/3)

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Fluid Balance (Antidiuretic Hormone - ADH)

Hormone involved: Antidiuretic Hormone (ADH) (produced by the hypothalamus and released by the pituitary gland)

Process:

1. Stimulus: Blood water levels decrease (e.g., dehydration) or blood osmolarity increases.

2. Receptor: Osmoreceptors in the hypothalamus detect the change in blood osmolarity.

3. Control Centre: The hypothalamus triggers the release of ADH from the pituitary gland.

4. Effector: ADH causes the kidneys to reabsorb more water by increasing the permeability of kidney tubules (collecting ducts).

5. Response: Blood water levels increase, osmolarity returns to normal, and ADH secretion decreases (negative feedback).

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Understand -

The role of the components in performing the functions pf the renal system.

The mechanism of osmoregulation

The development, impact and management of chronic kidney disease (CKD).

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Afferent - 'leading in'

Efferent - 'leading out'

Medulla - 'inner part of the organ'

Proximal - near the main 'body'

Distal - far from the main 'body'

Convoluted - intricately folded, twisted or coiled.

osmosis – the process of distributing water across semi-permeable membranes to dilute higher concentrations of particles.

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Kidney Structure | Cambridge (CIE) A Level Biology Revision Notes 2023

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Revision notes on Kidney Structure for the Cambridge (CIE) A Level Biology syllabus, written by the Biology experts at Save My Exams.

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Biology - Kidney Failure (Kidneys Part 3/3)

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Urinary System, Part 1: Crash Course Anatomy & Physiology #38

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Urinary System, Part 2: Crash Course Anatomy & Physiology #39

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Kidneys and homeostasis test questions - WJEC - GCSE Biology (Single Science) Revision - BBC Bitesize

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Revise the structure of the excretory system including the kidney and the nephrons. How can dialysis or transplantation help when our kidneys fail?

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The nephron - Higher tier only - The role of the kidneys in homeostasis – WJEC - GCSE Biology (Single Science) Revision - WJEC - BBC Bitesize

# data[].attributes.attachment_link.description
Revise the structure of the excretory system including the kidney and the nephrons. How can dialysis or transplantation help when our kidneys fail?