Otro

Controlling Blood Water Potential

6 vistas 0 veces vendidas

Grado
Unit 5

Institución
OCR

Controlling blood water potential process flashcard. OCR A: A level biology revision notes. Module 5: Communication, Homeostasis and Energy. A* biology student's notes. Summary of key content to be memorised. Process that needs to be memorised from specification.

[Mostrar más]

Vista previa 1 fuera de 1 páginas

Ver ejemplo

Subido en 5 de diciembre de 2023
Número de páginas 1
Escrito en 2023/2024
Tipo Otro
Personaje Desconocido

blood
water potential
osmosis
ions
diffusion
active transport
adh
control
isotonic
hypertonic
hypotonic
a level
biology
ocr a
communication
energy
homeostasis
flashcard
process

Nivel de Estudio
A/AS Level
Editores
OCR
Tema
Biology A
Curso
Unit 5

5,54 €

Añadido

Añadir al carrito

Añadir a la lista de deseos

100% de satisfacción garantizada
Inmediatamente disponible después del pago
Tanto en línea como en PDF
No estas atado a nada

Controlling Blood Water Potential: Controlling Blood Water
Potential:
Osmoreceptors in the hypothalamus monitor blood
passing through the hypothalamus.
When the water potential in the blood is too low, water
moves out of these cells into the blood vessels by
osmosis – causing the osmoreceptor cells to shrink.
This causes neurosecretory cells in the hypothalamus to
be stimulated to produce ADH.
When the neurosecretory cells are stimulated, they
cause ADH to be released into the blood capillaries in
the posterior pituitary gland
ADH uses a secondary messenger system as it is too
large & polar, so cannot cross the plasma membrane
since it is not lipid soluble.
ADH molecules combine with receptors on the plasma
membrane on cells of the collecting duct.
This activates an enzyme, which in turn causes vesicles
within the cell to fuse with the cell surface membrane.
These vesicles contain aquaporins (water permeable
channels) making the collecting duct membrane more
permeable to water.
More water leaves the collecting ducts by osmosis &
will be reabsorbed into the blood, resulting in more
concentrated urine.
This causes an increase in water potential in the blood.
When water potential of the blood is high, water moves
into osmoreceptor cells, causing them to swell.
This inhibits the release of ADH.
In the presence of less ADH, the plasma membrane
folds inwards around the aquaporins, forming vesicles
around them.
Making the membrane less permeable to water.

Los beneficios de comprar resúmenes en Stuvia estan en línea:

Garantiza la calidad de los comentarios

Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!

Compra fácil y rápido

Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.

Enfócate en lo más importante

Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!

Preguntas frecuentes

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

100% de satisfacción garantizada: ¿Cómo funciona?

Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.

Who am I buying this summary from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller flcarr23. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for 5,54 €. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

45,681 summaries were sold in the last 30 days

Founded in 2010, the go-to place to buy summaries for 14 years now

Empieza a vender

Vistos recientemente

Examen ·

(0)

Institución educativa

Libros populares