IB Biology Topic D3.3.7 Role of the Kidney in Osmoregulation and Excretion Revision Notes (HL)

IB Biology Topic D3.3.7 Role of the Kidney in Osmoregulation and Excretion Revision Notes (HL) | RevisionDojo

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The Kidney Is Crucial in Osmoregulation and Excretion

The kidney filters water and solutes from blood plasma, then selectively reabsorbs the substances the body needs.
This makes it central to both osmoregulation and excretion, the two jobs that keep the internal environment stable.

Note

Osmoregulation controls the water and solute balance of the blood.
Excretion removes the waste products of metabolism from the body.

Osmoregulation Keeps the Blood's Water Balance Stable

Definition

Osmoregulation

Osmoregulation is the process of maintaining the balance of water and solutes in the body.

Osmoregulation controls the water and solute balance of the body's fluids.
It keeps the osmotic concentration of blood stable at about 300 mOsm/L.
The kidney does this by adjusting how much water it reabsorbs and how concentrated the urine becomes.

Theory of Knowledge

How does the nephron of a desert mammal reflect evolutionary adaptation to a dry environment?

Excretion Removes Metabolic Waste Such as Urea

Definition

Excretion

Excretion is the removal of metabolic waste products.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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The Kidney Is Crucial in Osmoregulation and Excretion

The kidney filters water and solutes from blood plasma, then selectively reabsorbs the substances the body needs.
This makes it central to both osmoregulation and excretion, the two jobs that keep the internal environment stable.

Note

Osmoregulation controls the water and solute balance of the blood.
Excretion removes the waste products of metabolism from the body.

Osmoregulation Keeps the Blood's Water Balance Stable

Definition

Osmoregulation

Osmoregulation is the process of maintaining the balance of water and solutes in the body.

Osmoregulation controls the water and solute balance of the body's fluids.
It keeps the osmotic concentration of blood stable at about 300 mOsm/L.
The kidney does this by adjusting how much water it reabsorbs and how concentrated the urine becomes.

Theory of Knowledge

How does the nephron of a desert mammal reflect evolutionary adaptation to a dry environment?

Excretion Removes Metabolic Waste Such as Urea

Definition

Excretion

Excretion is the removal of metabolic waste products.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D3.3.7: Role of the Kidney in Osmoregulation and Excretion Notes

The Kidney Is Crucial in Osmoregulation and Excretion

Osmoregulation Keeps the Blood's Water Balance Stable

Excretion Removes Metabolic Waste Such as Urea

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

The Kidney Is Crucial in Osmoregulation and Excretion

Osmoregulation Keeps the Blood's Water Balance Stable

Excretion Removes Metabolic Waste Such as Urea

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics