St. George's College
across the Plant Cell
Date: June 9th
Link and Learn
8th Milton A ‐ Transport across the Plant Cell Name
Sergio María Fernanda Alejandra Almendra Anna Paula Sandra E‐C Maia María Belén Alfredo Kinley Arianne Sandra M. Fiorella Rodrigo Giulia Jaime Stefano Bruno
8th Milton Alpha ‐ Transport across the Plant Cell Name
Marcelo Antonella Paulo Alejandro Brenda Diego Gabriel Valeria Cristina Giuliana Joshua María Gracia Gonzalo N. Paolo Gonzalo R. Giorgio Nicolás María Claudia
Let's remember previous learned concepts...
Plant Cell 4
PLANT TRANSPORT • Living things require materials (substances, compounds, molecules) transported from one place to another inside and outside its structure. • However, transport presents certain difficulties. The size of the organism is the first one. • Can you imagine other ones?
Direction of Transport
DIFFUSION • Only very small organisms can carry things around their body by diffusion. • The very first type of plants, called non‐vascular plants, use diffusion from cell to cell to transport water and nutrients.
PLANT TRANSPORT SYSTEM • Plants have a transport system formed by thin tubes inside them. • This transportation system carries liquids up and down stem and all around the plant. • Some tubes are called Xylem, they carry water and mineral salts. The roots take in water and dissolved salts, they pass up the stem in the xylem to the leaves. • Some tubes are called Phloem, they carry dissolved food like sugars and amino acids which are made in the leaves by photosynthesis. The phloem carries the food to all parts of the plant. • The phloem also carries hormones around the plant. These hormones control cell division for growth of the stems, roots and leaves, as well as the growth of flowers and fruits.
PLANT ANATOMY Inside the Root
Inside the Stem
ROOTS • Plant roots have two major functions: 1. The roots anchor the plant in the soil. 2. The roots take up water and mineral salts. • Root Hairs: located just behind the root tip, as microscopic hairs. Water passes into the root hairs by Osmosis, until it reaches the xylem that transports it to the leaves.
Transpiration • Water is pulled up the Xylem in the stem from the roots to the leaves. • This water is used for photosynthesis and to maintain the plant turgid and from wilting. • In the leaves,water evaporates into the air by the process of transpiration. • The water that is used or lost by transpiration, more water is pulled up through the Xylem. Example, like sucking water up a straw. • This causes a continuous flow of water up the Xylem called transpiration stream. • More transpiration takes place during the day than at night, because the stomata are open during the day and close at night. • The stomata can also close in very dry conditions, because the water lost is not being replaced with water from the soil.
Transporting Food • The process of photosynthesis happens in the leaves, producing: sugar, amino acids and fatty acids. • The process through which food is carried to all parts of the plant through the Phloem is called Translocation. • Xylem are dead tubes, but Phloem is living tissue, which means that moving substances through it involves active transport.
K-W-L Chart What I KNOW about this topic
What I WANT to know about this topic
What I LERANED about this topic
SURVEY If you want to contribute in improving your Biology class, click in the survey link:
Google Forms Term II ‐ 8th Biology ‐ Class 3
Resources Used Slide Resource (Group )
G1 ‐ 2 Image
G1 ‐ 5 Image
G1 ‐ 6 Video
Inner Life of the Cell
G1 ‐ 8 Image
G1 ‐ 9 Video
G1 ‐ 10 Video
Endo‐ and Exocytosis
G1 ‐ 11 Images
Lipids Proteins Carbohydrates
http://bit.ly/16WUmF http://bit.ly/191FrS http://bit.ly/HAqG5
G1 ‐ 12 Image
G1 ‐ 13 Animation Cell Models
G1 ‐ 14 Images
Glycogen in Liver Cells Lipids in Liver Cells
G1 ‐ 15 Image
Types of Polysaccharides Unknown
G1 ‐ 16 Images
Adipose Tissue 1 Adipose Tissue 2
G1 ‐ 17 Image
G1 ‐ 17 Video G1 ‐ 17
Teacher's Notes This class has been designed to cover the topics of Transport across the Plant Cell from June 8th till Friday June 12th. For further knowledge about this topic: 1. Conduct a thorough search under the topic: Transport across the Plant Cell on the Web, books and magazines. 2. If findings are not specific, ask your teacher for suggestions.
Objectives • Learn and understand the process and importance of transporting substances across the plant membrane.
Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.
Vocabulary • • • • •
Osmosis: Root: Stem: Transpiration: Hormones:
Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.
Link and Learn You can visit the following websites to improve your understanding on the present topic: • • • •
http://science‐learning2009.wikispaces.com http://learningandscience.blogspot.com http://bit.ly/hCg8Z http://bit.ly/15vd0q
Gerardo LAZARO Science Lead Teacher Email: firstname.lastname@example.org Wiki: http://science‐learning2009.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro