Body Responses
What system increases blood flow to the skin to help release heat?
Cardiovascular system
Mild heat illness with heavy sweating and fatigue.
Heat exhaustion
Name one long-term adaptation from repeated heat exposure.
Heat acclimatization
Endurance is typically decreased in hot conditions because of…
Cardiovascular strain and dehydration
Athletes at the 2020 Tokyo Summer Olympics faced extreme heat. True or False?
True
What is the main way the body cools itself in hot conditions?
Sweating / Evaporation
Dangerous condition when sweating stops and core temp rises.
Heat stroke
How does plasma volume change with heat adaptation?
Plasma volume increases
Short-term sprint performance in heat is affected mainly by…
Muscle fatigue and dehydration
Which U.S. city had a major heat wave in 2023 affecting outdoor workers?
phoenix
Name the nervous system response that triggers sweating.
Sympathetic
What can happen if dehydration becomes severe in the heat?
Heat-related collapse, organ failure
Why does core temperature rise more slowly after acclimatization?
Body becomes more efficient at cooling
Name one benefit of heat acclimatization for athletes.
Improved performance / less risk of heat illness
Marathon runners in which region face desert heat challenges?
middle eastttttt
When heart rate rises in heat, what is it trying to do?
Deliver more blood to the skin for cooling
What electrolyte imbalance often occurs in extreme heat?
hyponatremia
Name a cellular-level adaptation to repeated heat exposure.
Increased sweat gland
How does heat affect perceived exertion?
Exercise feels harder / higher perceived effort
Military personnel often use this method to prepare for hot conditions.
Heat acclimatization protocol
What happens to respiratory rate during heat stress?
It increases to help remove heat through evaporative cooling
Which organ is most at risk during heat stroke?
brain
How does acclimatization affect electrolyte loss in sweat?
Electrolyte loss decreases
Why might hot environments improve some short-term explosive activities?
Warmer muscles increase speed of contraction and flexibility
What real-world factor can make heat illness worse for athletes during competition?
high humidity/ lack of shade