Neurones Study guides, Revision notes & Summaries

AQA GCSE Biology - B5 What is homeostasis? The regulation of conditions inside the body to maintain a stable internal environment in response to changes in both internal and external conditions What things do automatic control systems regulate? Body temperature, blood glucose level and water content What are the three main components that work together in automatic control systems? Receptors, coordination centres and effectors What does negative feedback do? When the level of some...

AQA A Level Biology - Topic 6 - Survival And Response What is a stimulus? A change in the environment of an organism What is a tactic response? What is a kinetic response? Directional movement in response to a stimulus Non directional random movement in response to a stimulus What is a positive and negative taxis? Positive taxis- organism moves towards stimulus Negative taxis - organism moves away from stimulus What Are receptors? different types What are effec...

negative tropisms - Answer-growth away from a stimulus Define homeostasis - Answer-Homeostasis is the regulation of internal conditions in the body. It is necessary to maintain optimal conditions for body functioning. These internal conditions can change as a result of processes within the body and as external conditions change. systems responsible for homeostasis - Answer-the nervous system - uses electrical impulses to communicate the endocrine system - uses chemical molecules to commun...

What is homeostasis? - CORRECT ANSWER-The maintenance of a constant internal environment. What is a stimulus? - CORRECT ANSWER-A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - CORRECT ANSWER-Detect the stimulus or change in environment. What happens after the receptors? - CORRECT ANSWER-Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? -...

what did multicellularity lead to? - need for a highly coordinated system to regulate and integrate the physiological functioning of different cells within one organism mode of hormonal communication? - chemical signalling examples of types on triggers? - location, visual, language, sound, gesture visual trigger - circadian rhythms location trigger - sender to receiver language trigger - chemical signalling gesture trigger - social, stress, sex sound trigger - lactation what is the unit...

AQA GCSE Biology Paper 2 Graded A+ What is homeostasis? ️The maintenance of a constant internal environment. What is a stimulus? ️A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? ️Detect the stimulus or change in environment. What happens after the receptors? ️Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? ️The brain or spi...

Role of neurones - Answer To transmit electrical impulses rapidly around the body to allow the organism to respond to changes in internal and external environment Parts of a general neurone - Answer Cell body, Dendron, axon, Role of the cell body - Answer To produce neurotransmitters Structure of cell body - Answer Nucleus, cytoplasm, lots of endoplasmic reticulum, mitochondria Function of dendrons - Answer To transmit electrical impulses towards the cell body Function o...

AQA GCSE Biology Paper 2 With All Answers What is homeostasis? - ANSWER The maintenance of a constant internal environment. What is a stimulus? - ANSWER A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - ANSWER Detect the stimulus or change in environment. What happens after the receptors? - ANSWER Receptors send messages to the CNS via the sensory neurone. ...