Revision - Cells by Jane Sim https://padlet.com/janesimtll/6x2puxnj39krb480 SEC 1 - RGS - Fri (7.30om) en-us 2020-08-05 10:55:43 UTC 2021-09-28 12:40:40 UTC hello@padlet.com Red blood Cells (natasha) janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012770 - Contains haemoglobin
    -> Haemoglobin combines with oxygen easily, and this helps to absorb and transport oxygen around the body
- Does not contain a nucleus
   -> To contain more haemoglobin for transport of more oxygen
- Circular, Biconcave shape
   -> Increases surface area to volume ratio of the cell, increasing rate of diffusion of oxygen in and out of the cell
- Elastic
   -> Allows it to change shape and easily squeeze through blood capillaries

- The RBCs lacks mitochondria
--> to ensure that the RBCs do not use up the oxygen for respiration that is supposed to be transported to the cells]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012770 Xylem Tissue janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012771  Muhan
- xylem vessels are found in plants. They transport water and mineral salts.

Structure 1:
- in the xylem vessel, there are dead cells along long hollow tubes, without cross walls and does not have protoplasm.

Function 1:
to allow the transport of water and mineral salts upwards easily and quickly without resistance.

Structure 2:
- xylem vessel walls are deposited with lignin.

Function 2: 
to provide mechanical support to the plant and prevent collapse of xylem vessels.

]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012771 Root hair cell janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012772 Sze Hann
- long and narrow extension--> which increases the surface area to volume ratio for the root hair cell to absorb water and mineral salts from the soil to the rest of the plants, increasing the rate of absorption]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012772 Guard cells janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012773 roxanne
- function: open and close the stomata to facilitate gaseous exchange]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012773 Eukaryotic cell janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012774 Reanne
- contain a nucleus - genetic material (DNA - Linear DNA)
- contains many membrane bound organelles
- enclosed by a plasma membrane
- reproduce slowly (24 hour)
e.g. fungi, plants, animals]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012774 Prokaryotic cell janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012775 Chloe
Prokaryotic cells
- no nucleus as the DNA exists as nucleoids
- its DNA is circular
- it has no membrane-bound organelles
- reproduce quickly
- genetic material are not enclosed in nucleus,
- eg. bacteria, archaea

]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012775 What is a cell made up of? janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012776 1. Cells consists of protoplasm: consists of cytoplasm, nucleus, cell surface membrane

2. Cells contain organelles: organized and specialised structures within the cell that each have a specific function]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012776 Animal cell [1] janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012777 Parts of animal cells
Karissa
1) Cytoplasm/Cytosol - is the site of most chemical reactions occur
Cytosol - fluid portion of the cytoplasm
Cytosol + organelles = cytoplasm

2) Cell surface membrane- selectively permeable and controls movement of substances in and out of the cell.


]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012777 Plant cells [1] janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012778 Aathmika
1) Cellulose cell wall
- It is made up of cellulose
- supports the cell
- gives the cell a regular shape.
- fully permeable --> allows all substances to pass through

2) Vacuole 
- Large central vacuole 
- contains cell sap --> consists of water, sugar, salts and other dissolved substances
- It contains temporary storage of food, air and water]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012778 Animal cell [2] janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012779 Su Yeon
3) Vacuole has small vesicles containing temporary storage of food, air and water. They have many small temporary vacuoles.
4) Nucleus is the largest organelle in the cell that contains genetic material (DNA) in chromosomes. It controls activities of the cell including cell reproduction, growth, repair of worn-out parts and others. 

]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012779 Plant cells [2] janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012780 3) Chloroplast
Emily — Chloroplast contains chlorophyll which absorbs light energy from the sun and converts it into chemical energy in the synthesis of glucose during photosynthesis.

]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012780 Level of organizations chloe cheong janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012782 cell, tissue, organ, organ system, organism]]> 2020-08-05 10:55:43 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670012782 Definitions janesimtll https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670013232 Clarisse
1) Cells - a basic unit of organism
2) Tissue - a group of similar cells performing a specific function
3) Organ - consists of several different tissues working together to perform a specific function
4) Cell specialisation - each type of cell performing a specific function in a multicellular organism]]> 2020-08-05 10:57:00 UTC https://padlet.com/janesimtll/6x2puxnj39krb480/wish/670013232