Chapter 5

Question 1

function of the heart

Answer 1

• transport of gases (oxygen, carbon dioxide)
  -transpiration of fuel ( glucose and triglycerides)
• thermoregulation (manage body temp)

Question 2

Acute cardiac responses to exercise

Answer 2

• increased hr
• increased stroke volume
• increased cardiac output
• increased bp
• redistribution of blood flow

Question 3

increased hr

Answer 3

the amount of times your heart beats per minute (bpm)
- our hr increases during exercise as our heart needs to beat faster in order to supply more oxygen to the working muscles

Question 4

increased stroke volume

Answer 4

how much blood your left ventricle pumps out each contraction (measured in ml)
- heart needs to squeeze out more blood each beat in order to supply more blood and oxygen to the working muscles

Question 5

cardiac output

Answer 5

measure of how much blood is pumped out of LEFT ventricle each min

Question 6

vascular acute responses

Answer 6

thermoregulation
redistribution of blood

Question 7

thermoregulation (+hyper and hypothermia)

Answer 7

• keeping homeostasis
  hyper- body gains more heat than it loses
  hypo- when core body temp falls below min temp required

Question 8

redistribution of blood (constriction and dilation)

Answer 8

• blood flow is redirected away from organs and inactive muscles to ensure working muscles receive the greatest % of cardiac output
• vasoconstriction - arterioles constrict to stop blood flow to areas
• vasodilation- arterioles dilate to allow blood flow into areas
• increased bf to assist temp reg
• decreased blood flow to the skin if at max intensity