Nervous system and homeostasis (B13) 0.0 / 5 ? BiologyDNA and inheritanceGCSEAQA Created by: rebeccastorey2003Created on: 17-02-20 11:22 What is the function of the nervous system? It enables organisms to react to their surroundings and coordinations behaviour 1 of 20 What are the two parts of the central nervous system? Brain and spinal cord 2 of 20 Why are reflex actions describes as rapid and automatic? They do not involve the conscious part of the brain 3 of 20 Why are reflex actions important? For survival and to prevent damage to the body 4 of 20 Give the pathway of a nervous system Stimulus —> receptor —> coordinator —> effector —> response 5 of 20 Give the function of the cerebral cortex Outer layer of the brain playing an important role in consciousness 6 of 20 Give the function of the medulla oblongata Part of the brain above the spinal cord that controls breathing and heart rate 7 of 20 Give the function of the cerebellum Part at the back of the brain involved in coordinating muscle activity 8 of 20 Why is the difficult to treat brain disorders? Brain is very complex and delicate 9 of 20 What is a synapse? Gap between two neurones, allowing impulse to cross 10 of 20 What is the function of neurones? Carry electrical impulses around the body 11 of 20 What is homeostasis? Maintenance of a constant internal environment 12 of 20 Give three internal conditions controlled In homeostasis Body temperature, blood glucose concentration, and water levels 13 of 20 Give three things all control system include Receptors, coordination centres, and effectors 14 of 20 What is accommodation? Process of changing shapes of the lens to focus on near/distant objects 15 of 20 Give two common defects of the eyes Myopia (short-sighted) and hyperopia (long-sighted) 16 of 20 How can eye defects be treated? Spectacle lenses, contact lenses, laser surgery, and replacement lenses in the eye 17 of 20 Where is the body temperature monitored and controlled Thermoregulatory canter in the brain 18 of 20 What happens if body temperature is too high? Blood vessels dilate (vasodilation) and sweat is produced 19 of 20 What happens if body temperature is too low? Blood vessels constrict (vasoconstriction), sweating stops, and shivering takes place 20 of 20
Comments
No comments have yet been made