Nerve Coordination A2

Synapses

Structure Neurons are separated by a synaptic cleft (approx. 20-30nm wide) Presynaptic neurone refers to the neuron that released the ...
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Slow Twitch and Fast Twitch Muscle Fibres

Skeletal muscles are made up of two types of muscle fibres Different muscles have different proportions of slow and fast ...
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Responses in Plants

Tropism A tropism is the response of a plant to a directional stimulus (a stimulus coming from a particular direction) ...
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Receptors

Resting Potential There is a difference in charge between the inside and outside of the cell The inside is negatively ...
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Photoreceptors

Light enters the eye Light hits the photoreceptor and is absorbed by light sensitive pigments Light bleaches the pigments resulting ...
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Passage of an Action Potential

Resting Potential Concentration of Na+ outside axon membrane is high (relative to inside) Concentration of K+ inside axon membrane is ...
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Pacinian Corpuscles

    Mechanoreceptors – detects a mechanical stimulus (i.e. pressure) Anatomy Found in the deeper layers (Dermis)  of the skin ...
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Neurone

Neurone Structure Name Structure Function Cell body · Contains nucleus and large amounts of Rough Endoplasmic Reticulum · Associated with ...
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Nerve Impulses

Resting Potentials Movement of ions, such as Na+ and K+, across the axon membrane is controlled by: Phospholipid bilayer of ...
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Muscle Structure

Types of Muscle Smooth Does not require conscious Found in walls of internal organs (excluding heart) g. Intestines, blood vessels ...
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