Biology / Topic collection
Living systems.
Control over intelligence. Computational models of reality.
Evidence, assumptions and consequences.
10 articles
Biology / Visual analysis
Cetirizine: what an H1 antihistamine changes
H1 inverse agonism explains selected symptom relief. Drowsiness and rare severe itching after stopping long-term use remain relevant safety considerations.
Biology / Visual analysis
Collagen supplements: from digestion to uncertain benefit
Collagen-derived peptides can reach blood after ingestion. Human efficacy depends on the formulation, outcome and trial quality.
Biology / Visual analysis
Cough, sneeze, fever: three responses, many possible causes
Airway reflexes and fever have protective functions but multiple causes. Mechanisms alone do not identify an illness or determine assessment needs.
Biology / Visual analysis
Dark-spot serums: mechanisms and efficacy evidence
Pigment production, transfer and turnover offer different targets. A promising ingredient is not proof that every serum treats every dark spot.
Biology / Visual analysis
Dopamine and cocaine: a transporter is not a receptor
Cocaine inhibits neurotransmitter transporters. Its effects on learning, behavior and health extend beyond a single dopamine mechanism.
Biology / Visual analysis
Hormones: signals, receptors and feedback
Hormone families differ in transport and signaling. Receptors, tissue context and feedback determine responses and interpretation.
Biology / Visual analysis
Ice and injury: pain relief is not proof of faster healing
Cooling can relieve pain. Human evidence for faster tissue regeneration remains uncertain, and trial comparators limit the conclusions.
Biology / Visual analysis
Inside blood: flow, diffusion and selective binding
Convection, diffusion and selective binding govern molecular transport in blood. Cell adhesion and coagulation involve the vessel wall.
Biology / Visual analysis
Melatonin is a night signal. Melanin is a pigment.
Melatonin conveys circadian timing; melanin contributes pigmentation. Supplement evidence differs across sleep conditions and does not establish a skin-color treatment.
Biology / Visual analysis
Sunscreen: SPF, coverage and protection
SPF measures a standardized sunburn-protection ratio. Filter properties, coverage, reapplication and exposure affect practical protection.