cells Flashcards
(17 cards)
Identify which of the following statements about cells are true
Most cells are microscopic.
Cells are not alive.
Cells are the basic units of structure and organization in organisms.
Some organisms are not made up of one or more cells
Most cells are microscopic
cells are the basic units of structure and organization in organisms
Determine which of the following organisms are unicellular. Snakes Mosquitoes Bacteria Humans
Bacteria
What are organs?
Heart, Brain, Lungs
What is the organ system?
The nervous system, digestive system, skeletal system
A student’s microscope has an ocular lens with a 10x magnification. Calculate the total magnification, if the objective lens is set to 30x.
3x
30x
40x
300x
300x
Define the field of view.
The area that can be seen through the microscope.
The image is blurry but you can still identify the specimen.
The ability of the microscope to make an object appear larger.
The image looks clear and is not blurred
The area that can be seen through the microscope
A student's microscope image is nearly in focus but slightly blurry. Identify what she should do to fix it. Adjust the fine focus knob. Adjust the coarse focus knob. Close the diaphragm more. Open the diaphragm more.
Adjust the fine focus knob.
Recall the name of the small structures inside cells that have different jobs. Organelles Organisms Cytosol Tissues
Organelles
Determine whether the above diagram shows a plant cell or an animal cell.
Plant
Animal
Plant
Recall which of the following organelles are only found in plant cells. Cell membrane Cell wall Chloroplast Nucleus
cell wall
Identify which of the following statements are true.
All cells are round in shape
Cells have different shapes and sizes
All cells have the same types and numbers of organelles
Most cells in an organism contain exactly the same DNA
Cells have different shapes and sizes
dentify two rules of scientific drawing that the student has broken.
Rules the student has broken include (two needed, 1 mark each):
Draw a sample of cells only
Don’t shade
Include total magnification
Don’t cross over label lines
Explain what is meant by the term specialized cells.
Specialized cells are cells that have a special job to do (function).
Different types of specialized cells have different structures and organelles to help them do their particular job effectively. This makes the types look different to each other.
Choose one type of specialized animal cell.
Write the name of the cell.
Describe its function in the body.
Explain how one of its structures or features helps it to do its job.
Red blood cell
- Red blood cell
- A red blood cell carries oxygen around the body, in the blood. Oxygen is needed by all of the cells in the body because it is used by mitochondria to release the energy stored in sugars. Cells need this energy to carry out the processes that keep them alive.
- Red blood cells contain a red pigment called haemoglobin, which attaches to oxygen and allows it to be moved from the lungs to another part of the body. Other features of red blood cells include their small size, their disc-like shape, their flexibility and their lack of nuclei.
Explain why repeating the experiment 24 times improved the quality of the results.
Repeating the experiment 24 times greatly increased the number of samples tested in the investigation. This improved the quality of the results because it made it more likely that the averages for each group were closer to the true values.
Identify the independent variable in this investigation.
Hint: The independent variable is the factor that is purposefully varied to investigate its effect. Average size of leaf cells Number of chloroplasts per leaf cell Amount of water received by each plant Amount of light received by each plant
Amount of light received by each plant
Identify two controlled variables in this investigation. Amount of water received by each plant Amount of light received by each plant Air temperature around each plant Number of chloroplasts per leaf cell
Amount of water received by each plant
Air temperature around each plant
