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Organisms respond to changes in their internal and external environments - A Level only (3.6)
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Nerve impulses - AL only (3.6.2.1)
Study notes
Overview
Favourites
A Level essentials
Practical biology for exams
Biological molecules (3.1)
Cells (3.2)
Organisms exchange substances with their environment (3.3)
Genetic information, variation and relationships between organisms (3.4)
Energy transfers in and between organisms - A Level only (3.5)
Organisms respond to changes in their internal and external environments - A Level only (3.6)
Survival and response - AL only (3.6.1.1)
Receptors - AL only (3.6.1.2)
Control of heart rate - AL only (3.6.1.3)
Nerve impulses - AL only (3.6.2.1)
Synaptic transmission - AL only (3.6.2.2)
Skeletal muscles are effectors - AL only (3.6.3)
Principles of homeostasis and negative feedback - AL only (3.6.4.1)
Control of blood glucose concentration - AL only (3.6.4.2)
Control of blood water potential - AL only (3.6.4.3)
Genetics, populations, evolution and ecosystems - A Level only (3.7)
The control of gene expression - A Level only (3.8)
Study notes
Overview
Favourites
A Level essentials
Practical biology for exams
Biological molecules (3.1)
Cells (3.2)
Organisms exchange substances with their environment (3.3)
Genetic information, variation and relationships between organisms (3.4)
Energy transfers in and between organisms - A Level only (3.5)
Organisms respond to changes in their internal and external environments - A Level only (3.6)
Survival and response - AL only (3.6.1.1)
Receptors - AL only (3.6.1.2)
Control of heart rate - AL only (3.6.1.3)
Nerve impulses - AL only (3.6.2.1)
Synaptic transmission - AL only (3.6.2.2)
Skeletal muscles are effectors - AL only (3.6.3)
Principles of homeostasis and negative feedback - AL only (3.6.4.1)
Control of blood glucose concentration - AL only (3.6.4.2)
Control of blood water potential - AL only (3.6.4.3)
Genetics, populations, evolution and ecosystems - A Level only (3.7)
The control of gene expression - A Level only (3.8)