Organism Response and Homeostasis Questions and Answers

Organism Response and Homeostasis
Questions and Answers
Homeostasis

Organisms' response and adaptation to the environment

Coordinated response requires

stimulus, receptor, and effector

Stimuli

Detectable changes in the environment

Receptors

Detect stimuli and signal changes

Effectors

Cause response to stimuli

Nervous system

Sends electrical messages via nerves

Endocrine system

Secretes hormones directly into the bloodstream

Central nervous system

brain and spinal cord

Sense organs

Linked to CNS by nerves

Neurotransmitters

Carry chemical signals between nerve cells

Sensory neuron

Transmits impulses from receptor to CNS

Motor neuron

Transmits impulses from CNS to effector

Relay neuron

Connects sensory and motor neurons