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This part of the cell contains DNA and controls cell functions.
Nucleus
What does unicellular mean?
Consisting of a single cell
Groups of cells that have the same structure and function are called...
Tissues
Diffusion is the movement of molecules from an area of ___ concentration to an area of ___ concentration
High....low
An increase in concentration _____ the rate of diffusion
Increases
This gel-like substance inside the cell holds the organelles in place.
Cytoplasm
When does diffusion stop?
When substance becomes equal throughout / when the substances reaches equilibrium
What do you call an organism that consists of more than one cell.
Multicellular
Animal cells shape
Round or irregular
This term refers to the outer layer of a plant cell that gives it structure and support.
Cell wall
Diffusion is a ______ process
Passive
Name all the levels of organisation of living things, from smallest to largest.
Cells, tissues, organs, organ systems
How does temperature effect the rate of diffusion?
Higher temperatures give molecules more energy, making them move faster and speeding up diffusion.
What is the main organ of the circulatory system?
Heart
Name two examples of diffusion
Tea, coffee, ink, smoke, food aroma, water in a cell, perfume.
Known as the "powerhouse" of the cell, this organelle produces energy.
Mitochondria
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.
This part of the cell acts as a protective barrier, controlling what enters and exits the cell.
Cell membrane
Name three different types of cells
Ciliated Cells, RBCs, Neurons, Xylem, Root hair, sperm, egg, palisade
Specialised cells that send messages throughout your body. They have long extensions called axons and dendrites that help them transmit electrical signals quickly to and from the brain and other parts of the body.
Neurons
What is the function of Ribosomes?
Ribosomes synthesise proteins.
Name two organ systems.
...the respiratory system, digestive and excretory system, circulatory system, urinary system, integumentary system, skeletal system, muscular system, endocrine system, lymphatic system, nervous system, and reproductive system.
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.
What is the function of Chloroplasts?
Chloroplasts produce energy through photosynthesis
What is a concentration gradient?
A concentration gradient exists when there is a region of high concentration leading to a region of low concentration.