Skip to content
Login Register

#pharmaceuticals

4 public questions tagged with this topic.

Applied Ecology

Which method do many pharmaceuticals enter freshwater ecosystems?

Many pharmaceuticals are consumed, incompletely metabolised, and excreted in urine or faeces. Sewer systems carry the parent compounds and active metabolites to treatment plants, where conventional processes may not remove them completely; treated effluent or untreated sewage then reaches rivers and lakes. Improper disposal can add to this route. Aerosols, fertilisers, and forest runoff are not the dominant general pathway. Because conventional polymers persist, fragmentation redistributes plastic into smaller pieces rather than removing its mass from the ecosystem. Trophic transfer can occur

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

View Details
Applied Ecology

Which type of pollution is caused by estrogen from pharmaceuticals?

Pharmaceutical estrogens entering water act as endocrine-disrupting contaminants because they mimic or alter normal hormonal signalling at very low concentrations. Binding to estrogen receptors changes gene expression, reproductive development, vitellogenin production, sex differentiation, and fertility in exposed organisms. This mode of action is distinct from direct neurotoxicity, DNA mutation, or acidification, although one chemical can sometimes have more than one biological effect. Monitoring should include appropriate controls, spatial replication, temporal variation, and validated analy

Ref: Campbell Biology, Urry et al., 12th Ed., Unit 8 Ecology

View Details