A3 Structure and function of biological tissues: Pearson BTEC National Applied Science (AAQ) Questions

Practise a3 structure and function of biological tissues with Pearson BTEC National Applied Science (AAQ) questions and mark schemes. Revise A3.1 The structure and function of epithelial tissue, A3.1.1 squamous as illustrated by the role of alveolar epithelium in gas exchange, A3.1.2 columnar as illustrated by goblet cells and ciliated cells in the lungs to include their role in protecting lungs from pathogens.

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What to revise

• A3.1 The structure and function of epithelial tissue
• A3.1.1 squamous as illustrated by the role of alveolar epithelium in gas exchange
• A3.1.2 columnar as illustrated by goblet cells and ciliated cells in the lungs to include their role in protecting lungs from pathogens
• A3.1.3 the effect of chronic obstructive pulmonary disease (COPD)
• A3.2 The structure and function of endothelial tissue, as illustrated by blood vessels in the cardiovascular system
• A3.2.1 risk factors that damage endothelial cells and lead to the development of atherosclerosis
• A3.3 The structure and function of muscular tissue
• A3.3.1 microscopic structure of a skeletal muscle fibre
• A3.3.2 structural and physiological differences between fast- and slow-twitch muscle fibres and their relevance to short term and endurance-based activities
• A3.4 The structure and function of nervous tissue
• A3.4.1 non-myelinated and myelinated neurones
• A3.4.2 the conduction of a nerve impulse along an axon, to include changes in membrane permeability to sodium and potassium ions and the role of the myelination in saltatory conduction
• A3.4.3 interpretation of graphical displays of a nerve impulse
• A3.4.4 synaptic structure and the role of neurotransmitters
• A3.4.5 imbalances of brain chemicals that can contribute to ill health, including dopamine in Parkinson’s disease
• A3.4.6 effects of drug interaction on synaptic transmission, to include agonists, antagonists and precursors

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