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687 results for “cell”
What each part of a cell does, how plant and animal cells differ, and the ladder from organelle to organism. The previous lesson. General Science 2.1 The Cell A cell is not a bag of jelly. It is an organised structure wi…
Build a concept map from organelle to organism, and say why the cell is the basic unit of life. How the parts of a cell do their jobs. General Science 2.1 The Cell The inquiry for this sub-strand is what makes up an orga…
The thin layer that surrounds every cell and decides what may enter and leave. The cell wall. Integrated Science 2.1 The Cell Every single cell, plant or animal, is surrounded by a cell membrane. It is far thinner than t…
All six parts of a plant cell together, and how to recognise each one. Observing and drawing onion cells. Integrated Science 2.1 The Cell Put the observations together and a plant cell has six named parts. Three of them …
…nt electrodes in an electrolyte convert chemical energy into a voltage and a current in the external circuit. Cells and batteries (lesson 1). Electrical Technology 1.4 Cells and Batteries Lesson 1 named the cell. This le…
Control, energy and traffic inside a cell, seen as biology, chemistry and physics working at once. Plant and animal cells under light and electron microscopes. General Science 2.1 The Cell Naming parts is not the same as…
The bag of cell sap that keeps a plant firm, and what happens when it runs short of water. The nucleus. Integrated Science 2.1 The Cell Leave a kale plant unwatered for a day and it goes limp. Water it and it stands up a…
The similarities and the three differences, set out so they can be recalled under pressure. The plant cell and the animal cell. Integrated Science 2.1 The Cell Both cell types have been studied separately. Now put them s…
The jelly that fills the cell and where nearly all its chemistry happens. The cell membrane. Integrated Science 2.1 The Cell Inside the membrane the cell is not hollow. It is filled with a clear jelly called cytoplasm. T…
Turgid, flaccid and plasmolysed, and why a wall means a plant cell can never burst. What osmosis is, and the vacuole from sub strand 2.1. Integrated Science 2.2 Movement of Materials in and out of the cell A plant cell i…
The three parts every animal cell has, and why it has no fixed shape. Observing animal cells. Integrated Science 2.1 The Cell An animal cell is simpler than a plant cell. It has three named parts, not six. Everything it …
The cellulose layer that gives a plant cell its shape, and why it lets everything through. The parts of a plant cell. Integrated Science 2.1 The Cell A plant has no skeleton, and yet a tree stands up. The support comes f…
With no wall to push back, an animal cell bursts in water and shrivels in strong salt solution. Osmosis in plant cells. Integrated Science 2.2 Movement of Materials in and out of the cell Put a red blood cell in pure wat…
The control centre of the cell, what it holds, and what happens without it. The cytoplasm. Integrated Science 2.1 The Cell The dark round spot in your onion cells was the nucleus. It is the smallest part you could see cl…
Primary cells cannot be recharged; the zinc-carbon dry cell, alkaline and button cells, their 1.5 V rating, and everyday Kenyan uses. Investigating a simple cell. Electrical Technology 1.4 Cells and Batteries A laborator…
Connecting cells positive-to-negative so voltages add, measuring the total, and matching cells in a string. Secondary cells. Electrical Technology 1.4 Cells and Batteries The outcome says: connect series and parallel bat…
The parts of a typical animal cell, their arrangement, and how a cheek cell looks under the school microscope. Preparing onion epidermis, and the first lesson on cell parts. Biology 1.3 Cell Structure and Specialization …
Plot terminal p.d. against current for a cell, read E from the intercept and r from the slope, and explain lost volts. The equation E = I(R + r) from the first lesson, and how to plot a straight-line graph. Physics 3.2 C…
The largest human cell, its food store, and the coat that changes after fertilisation. The sperm cell. Integrated Science 2.3 Reproduction in human beings The egg cell is the largest cell in the human body. At about 0.1 …
A cell built entirely for travelling, and how each part of it serves that one purpose. Functions of the male parts. Integrated Science 2.3 Reproduction in human beings A sperm cell is one of the smallest cells in the bod…
…ons must match. The previous lesson. Biology 3.2 Transport Blood is not simply a red liquid. It is a tissue - cells suspended in a fluid - and each component does a different job. Components of blood Blood clotting 1. A …
Explain cell division and the structure of chromosomes. Taxonomy II. Biology 1.4 Cell Division Cell division is the process by which one cell divides to form new cells. It is how organisms grow, repair and reproduce. Our…
How a simple cell turns chemical energy into electricity, primary and secondary cells, connecting cells in series and parallel, charging and maintaining secondary batteries, and the safe handling and disposal of batterie…
What is actually visible in an onion slide, what is not, and how to tell a cell from a bubble. Preparing a temporary slide. Integrated Science 2.1 The Cell Focus your onion slide on low power and the first surprise is ho…
How a cell's shape follows from the job it has to do. The previous lesson - you should know the parts of a cell and what they do. Biology 1.3 Cell Structure and Specialization Every cell in your body carries the same ins…
Zooming in from a whole organism to a single cell, and why the cell is where life begins. That living things are made of matter. Integrated Science 2.1 The Cell Take any living thing and look closely enough, and you arri…
The cellulose wall gives plant cells shape and support and stops them bursting; it does not control entry. The vacuole. You know turgor presses against a wall. Biology 1.3 Cell Structure and Specialization The cell wall …
Match donor antigens to recipient antibodies. O cells travel widely; O people cannot receive widely. Donate if you can. The lymphatic system and blood clotting. Biology 3.2 Transport The overview lesson named the four AB…
Why a cell must let some things in and some things out, and what decides which. The cell membrane, from the last sub strand. Integrated Science 2.2 Movement of Materials in and out of the cell A cell is not sealed. If it…
Rechargeable cells: lead-acid (2 V cells making a 12 V vehicle battery), lithium-ion packs, capacity in ampere-hours, and why charging must reverse the reaction. Primary cells. Electrical Technology 1.4 Cells and Batteri…
The parts of a typical green plant cell and why wall, chloroplasts and a large vacuole belong together. The animal cell in detail, and onion epidermis. Biology 1.3 Cell Structure and Specialization A typical green plant …
Turning the size of a drawing back into the true size of a cell, in millimetres and micrometres. Calculating magnification. Integrated Science 2.1 The Cell Your drawing of a cell is 40 mm across. The cell certainly is no…
The three quantities every circuit is described by, and what a cell really supplies. Sub-strand 3.1, for the idea of charge in coulombs. Physics 3.2 Current Electricity Static electricity was charge sitting still. Curren…
Two separate pipelines, and how water gets from soil to leaf with no pump anywhere. Sub-strand 2.1 for cell structure. Osmosis is explained here from scratch. General Science 2.3 Transport in plants A tall tree lifts wat…
…at. Measuring p.d. on the bench 1. Identify the two points: the two ends of a lamp, or the two terminals of a cell. 2. Connect the voltmeter across those two points only. It is a branch, not a new series component. 3. + …
…ree very different kinds of organism, the diseases they cause, and the routes they travel. Sub-strand 2.1 for cell structure. General Science 2.6 Microorganisms Microorganisms are organisms too small to see without a mic…
… and how plant and animal ultrastructure compare. What a school light microscope can show of plant and animal cells. General Science 2.1 The Cell The last lesson left a list of parts you could not see. This lesson is tha…
What a school microscope actually shows of plant and animal cells, and how to prepare and compare them. Seeing the cell, and the labelled plant and animal cell from the previous lessons. General Science 2.1 The Cell The …
Guard cells, the pore, and why only those epidermal cells have chloroplasts. The leaf as a gas-exchange organ. Biology 2.3 Gaseous Exchange and Respiration A stoma is not a hole punched in a leaf. It is a pore whose size…
The membrane as a partially permeable boundary that controls what enters and leaves every cell. The nucleus. You know plant cells also have a wall outside the membrane. Biology 1.3 Cell Structure and Specialization Every…