Examining Skeletal Muscle Under a Microscope Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they allow for ...
Ultrastructure of Striated Muscle Striated muscle?makes up the muscles in the body that are attached to the skeleton Striated muscle is made up of?muscle fibres A muscle fibre is a?highly sp...
Transmission Across a Neuromuscular Junction Striated muscle?contracts?when it receives an?impulse?from a?motor neurone?via the?neuromuscular junction Neuromuscular junctions work in a very ...
Predicting the Effects of Drugs on a Synapse Chemical or?drugs?can have a major impact on the functioning of the brain and nervous system Some prescription drugs can have a?beneficial effect...
Transmission Across a Cholinergic Synapse There are over 40 different known neurotransmitters One of the key neurotransmitters used throughout the nervous system is?acetylcholine?(ACh) Synap...
Edexcel IGCSE Biology 復習筆記 2.5.9 Humans: Digestive Enzymes The Role of Digestive Enzymes The purpose of digestion is to?break down large, insoluble molecules?into?smaller, soluble molecu...
Cholinergic Synapses Where two neurones meet, they do not actually come into physical contact with each other – a very small gap, known as the?synaptic cleft, separates them The ends of the ...
Edexcel IGCSE Biology 復習筆記 2.5.8 Humans: The Digestive System The Structure & Function of the Alimentary Canal The digestive system is an example of an?organ system?in which several ...
Edexcel IGCSE Biology 復習筆記 2.5.7 Humans: Balanced Diet The Importance of a Balanced Diet A?balanced diet?consists of all of the food groups in the?correct proportions The necessar...
Calculating the Maximum Frequency of Impulse Conduction After an action potential passes through a section of an axon it undergoes a?period of recovery?and is?unresponsive This is known as t...
Edexcel IGCSE Biology 復習筆記 2.5.6 Practical: Investigating Chlorophyll & Photosynthesis Practical: Investigating Chlorophyll and Photosynthesis Starch is stored in chloroplasts where ...
Factors that Affect the Speed of Conduction The?speed of conduction?of an impulse refers to?how quickly the impulse is transmitted?along a neurone It is determined by multiple factors: The?p...
