Summary
Summary OCR A/AS-Level Biology 2.6.4 Diversity in Animal Cells
- Institution
- OCR
Revision Summary of key knowledge from OCR A/AS-Level Biology 2.6.4 Diversity in Animal Cells.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
Seller
Follow
Content preview
Diversity In Animal CellsErythrocytes (Red Blood Cells)
Carry oxygen from lungs to respiring cells
Very small (7.5μm in diameter) – therefore high sa:v ratio
Biconcave shape increases sa:v
High sa:v ratio means oxygen can easily diffuse across the membrane and reach all
areas of the cell
Well developed cytoskeleton makes them flexible allowing them to fit through narrow
capillaries
Most organelles are lost during differentiation to free up space for haemoglobin
(including nucleus, mitochondria, ER, Golgi apparatus and a lot of cytoplasm)
Neutrophils
Most abundant type of phagocyte, a type of white blood cell (leukocyte)
Ingest invading pathogen by phagocytosis
12-15μm in diameter
Identifiable by multi-lobed nuclei
Travel to site of infection due to chemotaxis
Large number of lysosomes – die soon after ingesting a few pathogens and dead
neutrophils form pus around infection sites
Other forms of leukocyte exist such as macrophages, monocytes, and lymphocytes
Both red and white blood cells derive from stem cells in the bone marrow
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
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.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller izzylewington04. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
66579 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now