thermoregulation

Question 1

what is thermoregulation

Answer 1

the way in which the body adjusts its temperature
in response to external; conditions
or the amount of exercise being taken

Question 2

how does body fluid balance affect thermoregulation

Answer 2

fluid loss deceases plasma volume which reduced blood pressure
hence reducation in blood flow to skin and muscles
hence the heart has to work harder, body temp, hence fugue occurs, hence fluid intake is important during endurance activities

Question 3

how does temperature regulation happen

Answer 3

thermoregulatroty centre is situated in the hypothalamus
changes in body temp are sensed by central and peripheral receptors
body temp is maintained by balancing heat input and heat loss

Question 4

how does heat input happen

Answer 4

exercise
shivering
metabolic heat

Question 5

how does heat loss occur

Answer 5

radiation
conduction
convection
evaporation

Question 6

what happens in hot conditions relating to thermoregulation

Answer 6

evaporation of water from the skin to surface
body also tries to reduce its core temp by ensuring high blood flow to rho shell of the body where heat is stored and radiated to surroundings- causes flush red skin due to more blood than usual in facial skin
high humidity decreases te capacity to lose heat by evaporation
exercise in hot weather creates competition between the act muscles and the skin for lites blood supply

Question 7

temperature regulation in cold conditions

Answer 7

achieved by repeated muscular contractions
and is accompanied by withdrawal of blood from the edge parts of the body, such as the ski on hands and feet, fluid is then stored in the core and the kidneys will begin to exert water as urines to reduce the total fluid volume held centrally
hence fluid loss in cold conditions