Topic 25Biology
C3.1 Integration of body systems
Hierarchical organisation of organisms, coordination by nervous and endocrine systems, CNS/PNS and reflex arcs, and (HL) the hypothalamus-pituitary axis plus fight-or-flight integration via adrenergic receptor diversity.
123
Hierarchical organisation and two coordination systemsSign up
Hierarchy: cells → tissues → organs → systems · Nervous + endocrine coordination
30 min
Central nervous system and reflex arcsSign up
CNS / PNS and sensory + motor neurons · Reflex arcs (monosynaptic + polysynaptic)
30 min
Hypothalamus-pituitary axis and fight-or-flight (AHL)HLSign up
Hypothalamus + anterior + posterior pituitary · Epinephrine fight-or-flight + adrenergic receptor subtypes
30 min