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B1 Part 1 B1 Lesson 11 Antibiotic Resistance B1 Lesson 13 Reflex actions
Year 9

Learning outcomes and Specification referenceEdit

B1.2.1 The nervous system B1 Lesson 12 Nervous System
a The nervous system enables humans to react to their surroundings and coordinate behaviour. Describe the functions of the main structures in the nervous system.
b Receptors detect stimuli. Match receptors of the eye, ear, tongue and skin with the stimuli they detect.
c Basic structure of a light receptor cell. Label a light receptor cell with a nucleus, cytoplasm and cell membrane.
Explain the importance of being able to respond to environmental changes.

Full Specification TextEdit

a) The nervous system enables humans to react to their surroundings and coordinate their behaviour.
b) Cells called receptors detect stimuli (changes in the environment). Receptors and the stimuli they detect include:
■ receptors in the eyes that are sensitive to light
■ receptors in the ears that are sensitive to sound
■ receptors in the ears that are sensitive to changes in position and enable us to keep our balance
■ receptors on the tongue and in the nose that are sensitive to chemicals and enable us to taste and to smell
■ receptors in the skin that are sensitive to touch, pressure, pain and temperature changes.

c) Light receptor cells, like most animal cells, have a nucleus, cytoplasm and cell membrane.

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LinksEdit

References to lessons and resources in commercial schemesEdit

Nelson ThornesEdit

OUPEdit

Harper CollinsEdit

Longman/PearsonEdit

HodderEdit

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