Neurones Study guides, Class notes & Summaries

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 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. ...

homeostasis A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level nervous system A conglomeration of billions of cells specifically designed to provide a communication network within the human body. receptors Special structures that allow living organisms to sense the conditions of their internal or external environment stimuli Changes, occurring within or outside the body, that affect...

Outline how a negative feedback mechanism works (4) Oct/Nov 2017 V1 - 1 change in factor away from, the norm / set-point 2 detected / sensed by, receptor 3 hormone released or (nerve) impulse sent 4 (hormone / impulse) reaches, target organ / effector ; 5 (effector) performs corrective action- counteracts change 6 (factor) returns to, norm / set-poin Describe the role of the nervous system in the control of blood glucose concentration (4) Oct/Nov 2017 V1 - 1 hypothalamus detects cha...

Auxin is a plant hormone produced in the shoot tip. Auxin causes cell elongation and travels down the stem from the tip. Auxin is destroyed by sunlight. Explain how this leads to positive phototropism in the plant. Correct Answer Auxin is broken down on the sunny side of the plant. Cells on the shaded side will elongate due to auxin, causing curvature of the stem so that the plant grows towards the light. Ivy plants often use walls or other plants as a support when growing. State the type of ...

AQA GCSE Biology Homeostasis Exam Questions With All Correct Answers What is homeostatis? - CORRECT ANSWER The regulation of the conditions in our body maintaining stable internal environment What does it do? - CORRECT ANSWER Responds to any change in internal or external conditions What are the 3 main components in automatic control systems? - CORRECT ANSWER Receptors, coordination centres and effectors What is a stimulus? - CORRECT ANSWER A change in your env...

AQA A Level psychology- Biopsychology Questions and Answers 100% Pass What components make up the Central Nervous system The brain and spinal cord The peripheral nervous system has two divisions, what are they? Autonomic nervous system and Somatic Nervous system Which division of the Peripheral Nervous System contains the sympathetic and parasympathetic divisions? Autonomic What is the somatic nervous systems role? To communicate with sense organs and voluntary muscles Which part of the cent...

Describe the events of fertilisation that occur after the acrosome reaction. -Membrane of sperm and egg cell fuse together -cortical granules release contents into zona pellucida -Zona pellucida thickens -Haploid nuclei fuse Explain how phospholipids form a cell surface membrane -Hydrophilic parts associate with water -Hydrophobic parts repel water -a bilayer forms with hydrophobic parts pointing in towards the centre of the bilayer Describe the role of the CFTR protein in e...