CIE A Level Biology复习笔记16.1.1 Haploidy & Diploidy
Haploid & Diploid Cells A diploid cell is a cell that contains two complete sets of chromosomes (2n) These chromosomes contain the DNA necessary for protein synthesis and cell function Nearly a...
CIE A Level Biology复习笔记15.2.3 The Role of Gibberellin in Germination of Barley
The Role of Gibberellin in Germination of Barley Gibberellins are a type of plant growth regulator involved in controlling seed germination and stem elongation When a barley seed is shed from the p...
CIE A Level Biology复习笔记15.2.2 The Role of Auxin in Elongation Growth
The Role of Auxin in Elongation Growth Plant hormones (also known as plant growth regulators) are responsible for most communication within plants Auxins are a type of plant growth regulator that i...
CIE A Level Biology复习笔记15.2.1 Electrical Communication in the Venus Flytrap
Electrical Communication in the Venus Flytrap Plants possess communication systems that enable them to coordinate the different parts of their bodies The Venus flytrap is a carnivorous plant that g...
CIE A Level Biology复习笔记15.1.12 Sliding Filament Model of Muscular Contraction
Sliding Filament Model of Muscular Contraction Structure of thick & thin filaments in a myofibril The thick filaments within a myofibril are made up of myosin molecules These are fibrous protei...
CIE A Level Biology复习笔记15.1.11 Ultrastructure of Striated Muscle
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 specialis...
CIE A Level Biology复习笔记15.1.10 Stimulating Contraction in Striated Muscle
Stimulating Contraction in Striated Muscle Striated muscle contracts when it receives an impulse from a motor neurone via the neuromuscular junction When an impulse travelling along the axon of a m...
CIE A Level Biology复习笔记15.1.9 Cholinergic Synapses
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 two neu...
CIE A Level Biology复习笔记15.1.8 The Refractory Period
The Refractory Period Very shortly (about 1 ms) after an action potential has been generated in a section of the axon membrane, all the sodium ion voltage-gated channel proteins in this section clo...
