YV4 - Cells - 4.3 Animal and Plant cells

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

YV4 Cells

4.3 Animal and Plant cells

Cells

This chapter we will mainly look at the organisation level of cells.

You have seen some cell parts in year one, but we will look at some more this year.

The next slide includes a video that you can use to help you

Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.

What are the three differences between a plant cell and an animal cell? Write these differences down as:
1 =...
2 =...
3 =...

1) Cell wall (plants only)

2) Chloroplasts (plants only)

3) Centrioles (animal only)

What is number 1?

1. VACUOLE
2. CHLOROPLASTS
3. RIBOSOME
4. CYTOPLASM

What is number 6?

1. NUCLEUS
2. CELL MEMBRANE
3. CELL WALL
4. VACUOLE

What is number 2?

1. NUCLEUS
2. CELL MEMBRANE
3. CELL WALL
4. VACUOLE

What does a plant cell have that an animal cell has not?

1. nucleus
2. cytoplasm
3. celmembrane
4. chloroplasts

Which one is a plant cell?

1. 1
2. 2
3. 3
4. 4

An animal cell has

1. a nucleus - a cell wall - chloroplasts
2. a nucleus - NO cell wall - NO chloroplasts
3. NO nucleus - a cell wall - NO chloroplasts
4. NO nucleus - a cell wall - chloroplasts

Which organelles build proteins in the cell?

1. chloroplasts
2. cytoplasm
3. ribosomes
4. mitochondrion

The firm layer around the cell made of cellulose is called

1. Cell Wall
2. Cell membrane
3. Vacuole
4. Nucleus membrane

Lab skills

Microscopes

Learning goals

• What are the parts of the microscope 
• How should you operate the microscope 
• The drawings rules for microscope drawings 

The microscope

eyepiece lens = lens, magnifies 10x

tube = holds the eyepiece lens

revolver = holds the objective lenses, turns around

objective lenses = lenses hold by the revolver. Magnify 4x, 10x and 40x

stage = holds the slide

arm = used to hold the microscope when carrying

focus knob = lets you move the stage up and down. This helps you focus the image. There is a coarse and a fine knob. 

lamp = source of light

condensor = lets you control the amount of light passing through the slide

base = this is the base the microscope stands on

Through which part of the microscope do you look?

1. condensor
2. objective lens
3. eyepiece lens
4. revolver

revolver

objective lens

eyepiece lens

tube

turning piece that holds objective lenses

holds the eyepiece lens

lens, magnifies 10x

lens, magnifies 4x, 10x and 40x

What is the function of the condensor?

1. magnify the object
2. control amount of light
3. to hold the microscope
4. turn microscope on/off

What is the use of the objective lenses?

1. magnify image
2. control amount of light
3. move the object up and down
4. sturdiness

base

focus knob

condensor

stage

objective lens

tube

What are you no longer allowed to do once you switch form the red objective lens to one of the others?

1. make changes to the amount of light
2. turn the revolver
3. turn the coarse focus knob
4. turn the fine focus knob

In what state should you hand in the microscope?

1. stage down, smallest objective lens above stage
2. stage up, smallest objective lens above stage
3. stage down, largest objective lens above stage
4. stage up, largest objective lens above stage

Make a plan of action on how to properly focus the microscope on your object. Take a picture of this list (on paper) and upload here

03:19

Most of the rules in this video are the same as we discussed in class, but there are also some differences. State the differences you noticed.

Summarise (on paper) the drawing rules for yourself and upload a picture of it below

Next lesson we will have a microscope lesson.

You are allowed to use:

• your plan of action for focussing the microscope. 
• your summary of the drawing rules 
• a pencil, eraser and ruler.