anabolic - a process involving chemical reactions that produce complex molecules from simpler substances, catabolic - a process involving chemical reactions that breaks down complex molecules into smaller ones, diffusion - the movement of particles of a substance from an area of high concentration to an area of low concentration concentration , enzyme - a chemical that speeds up a rate of reaction, metabolism - all the chemical reactions occurring in the cells, effectors - muscles or glands that put the messages into effect, central nervous system (CNS) - the brain and spinal cord, cerebellum - the part of the brain that is responsible for coordination and balance, cerebrum - the part of the brain that controls conscious thoughts, and the movement of every body part, and receives sensory messages from each body part,  , dendrites - branches from the cell body that receive messages from other neurons, axon - a nerve fibre that sends nerve impulses away from the cell, motor neurons - nerve cells that carry messages from the CNS to effectors, receptor - a specialised cell that detects stimuli, sensory neurons - nerve cells that carry messages from cells in the sense organs to the CNS, synapse - the space between two neurons,

Year 9 Biology Glossary

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