Resumen

Summary Topic 1

0 veces vendidas

Grado
Topic 1

Institución
PEARSON (PEARSON)

Transport of substances, water, blood vessels, heart and cardiac cycle, atherosclerosis, blood clotting, energy balance, carbohydrates, lipids, high and low density lipoproteins, treatment of CVD

[Mostrar más]

Vista previa 3 fuera de 29 páginas

Ver ejemplo

Subido en 17 de marzo de 2023
Número de páginas 29
Escrito en 2022/2023
Tipo Resumen

topic 1lifestyle

Nivel de Estudio
A/AS Level
Editores
PEARSON (PEARSON)
Tema
Biology 2008
Curso
Topic 1

9,16 €

Añadir al carrito

Guardar

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

TOPIC 1: LIFESTYLE,
HEALTH AND RISK
TRANSPORT OF SUBSTANCES, WATER, BLOOD VESSELS, HEART
AND CARDIAC CYCLE, ATHEROSCLEROSIS, BLOOD CLOTTING,
ENERGY BALANCE, CARBOHYDRATES, LIPIDS, HIGH AND LOW
DENSITY LIPOPROTEINS, TREATMENT OF CVD

, TRANSPORT OF SUBSTANCES

• In order to survive, animals require essential substances to enter and
leave the body in sufficient quantities and be transported around the
body. The needs of small organisms can be served through diffusion
due to large SA:vol ratio of the body. However, as the size of the
organism increases:
Surface area to vol ratio decreases
Diffusion distance increases
Metabolic rate increases

, • Diffusion becomes insufficient for more complex organisms. Larger
organisms have a mass transport system, consisting of the heart
and circulation which moves the substances around the body and
allows exchange of substances to take place.
Features of a mass transport system:
• A network to move through e.g. vessels.
• A medium for movement a fluid like blood.
• Controlled direction- to move substances to/from where they are
needed e.g. blood is moved along a pressure gradient created by the
heart, the direction of flow is controlled by valves.
• Maintenance of speed, e.g. contraction of the heart and elastic recoil
of arteries helps to maintain the pressure gradient, thus speed.

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 aylinrahmani. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for 9,16 €. 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 15 years now

Empieza a vender