Cell Organelles
This part of the cell contains DNA and controls cell functions.
Nucleus
What does unicellular mean?
Consisting of a single cell
Diffusion is the movement of molecules from an area of ___ concentration to an area of ___ concentration
High....low
Animal cells shape
Round or irregular
An increase in concentration _____ the rate of diffusion
Increases
This gel-like substance inside the cell holds the organelles in place.
Cytoplasm
What do you call an organism that consists of more than one cell.
Multicellular
In facilitated diffusion, what is needed to help molecules across a cell membrane?
Leakage / channel proteins
This term refers to the outer layer of a plant cell that gives it structure and support.
Cell wall
What is the energy molecule called?
ATP (adenosine triphosphate)
Cell membrane
This part of the cell acts as a protective barrier, controlling what enters and exits the cell.
Cell membrane
When does diffusion stop?
When substance becomes equal throughout / when the substances reaches equilibrium
What is the function of Chloroplasts?
Chloroplasts produce energy through photosynthesis
What types of molecules require active transport to move across the cell membrane?
Large molecules, charged molecules, polar molecules
Does the processes of cellular respiration to produce energy.
Mitochondria
Groups of cells that have the same structure and function are called...
Tissues
Why don’t we immediately smell perfume when someone sprays it across the room, but after a few seconds, we do?
Perfume molecules spread by diffusion, moving from high to low concentration. It takes time for enough molecules to reach your nose, which is why you don’t smell it instantly.
Name two differences between plant and animal cells
Plant cells have a cell wall, chloroplasts, a large vacuole, and are rectangular. Only animal cells have lysosomes.
What type of concentration gradient needs active transport?
To pump from low to high concentration because the molecules want to spread out and not go to the high concentration.
What is the function of Ribosomes?
Ribosomes synthesise proteins.
Name all the levels of organisation of living things, from smallest to largest.
Cells, tissues, organs, organ systems
What is a concentration gradient?
A concentration gradient exists when there is a region of high concentration leading to a region of low concentration.
Explain why plants have chloroplasts and animal cells do not.
Animals are heterotrophs which mean they must eat other things to get food. Plants use chloroplasts to make their own food.
What does ATP do for the cell, where is it made, and what is the process called?
Energy molecule is made in the mitochondria through the process of cellular respiration.