Circulatory System
What organ pumps blood around the body?
Heart
What gas do humans breathe in?
Oxygen
Which body system uses nerves to send messages?
Nervous system
What does homeostasis mean?
Maintaining stable internal conditions
Define stimulus
A change detected by the body
Which blood vessel carries blood away from the heart?
Artery
What gas do humans breathe out?
Carbon Dioxide
Which body system uses hormones to send messages?
Endocrine system
Name one thing the body keeps stable.
Temperature / water / glucose etc.
What is the role of receptors?
Detect changes/stimuli
What is the name of the tiny blood vessels where gas exchange occurs?
Capillaries
What structures in the lungs are responsible for gas exchange?
Alveoli
Name 3 things the endocrine system is responsible for.
ANY 3
Growth, puberty, metabolism, stress response, mood, sleep, reproduction, blood sugar regulation, water balance, body temperature regulation, adrenaline
What happens to sweat production when body temperature rises?
It increases
What is the role of the control centre?
Processes information and sends instructions
What blood vessel carries deoxygenated blood back to the heart?
Veins
What muscle underneath the lungs helps breathing?
Diaphragm
The nervous system is made up of what body parts
Brain, spinal cord and nerves
What would happen to your organs if the body can't maintain homeostasis for extended time?
Organ failure
What is an effector?
A muscle or gland that carries out a response
Why does heart rate increase during exercise?
To deliver more oxygen and nutrients to muscles
Explain why breathing rate increases during exercise.
Muscles need to receive more oxygen, and we produce more carbon dioxide that needs to be removed
Why are nervous system responses usually faster than endocrine responses?
Nerve impulses travel faster than hormones in blood
What would likely happen to body temperature if a person could not sweat?
Body temperature would continue increasing / overheating
During exercise, identify the response pathway for increased sweating.
Stimulus: ↑ body temp → Receptors: thermoreceptors → Control centre: hypothalamus → Effectors: sweat glands → Response: sweating