Gcse combined science ocr gateway. The nervous system includes the central and peripheral nervous systems.



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Gcse combined science.

Light receptor cell diagram gcse. Receptors are groups of specialised cells. They can detect a. Contains the light receptor cells.

Learn vocabulary terms and more with flashcards games and other study tools. The rods and the cones. It is also a selective barrier cytoplasm where chemical reactions take place nucleus this controls the cell and contains the cells genetic information ribosome where protein synthesis occurs cellulose cell wall this strengthens and supports the.

This flow diagram summarises the steps involved in a nervous system. There are two groups. Receptors they detect a change in the environment stimulus and stimulate electrical impulses in.

The eye is a great example of a receptor and it also illustrates some reflex arcs too. But first we need to revise its structure. What is the cns made up of.

The receptor cells in the retina send electrical impulses down the optic nerve to the brain. The retina which has receptors which detect the light intensity and colour. Cell membrane this controls the movement in and out of the cell.

You will need to know about light receptor cells photoreceptors. Structure of the eye have a look at this cross section of the human eye. Light passes through the eyeball to the retina.

The diagram summarises how information flows from receptors to effectors in the nervous system. Receptor cells light stimulus light. Stimulus receptor cells sensory neurones spinal cord brain spinal cord motor neurone effector response.

Start studying gcse biology eye diagram. Where the optic nerve leaves the retina so lacks receptor cells. Receptors to effectors the diagram summarises how information flows from receptors to effectors in the nervous system.

Revise nervous coordination and control in humans for gcse biology with bbc bitesize. The sense organs including the eye contain receptors that are sensitive to stimuli and respond with reflex actions. There are two main types of light receptors rods and conesrods are more sensitive to light than cones so they are useful for seeing.

The rods respond to shades of light really they see in black and white.



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