Control of Heart Rate A2

Question 1

where can you find chemoreceptors

Answer 1

in the walls of the aorta and the carotid artery

Question 2

how does CO2 concentration affect the pH of the blood

Answer 2

increase in concentration of CO2 causes a decrease in the pH

Question 3

process of sending impulses to increase the heart rate

Answer 3

increased frequency of impulses to the medulla
increase in frequency of impulses to the SAN via sympathetic nerve
SAN increases frequency of impulses speeding up heart rate

Question 4

what detects and increase in blood pressure

Answer 4

baroreceptors

Question 5

process of impulses to lower heart rate when there’s too high blood pressure

Answer 5

increased frequency of impulses to the medulla oblongata
increased frequency of impulses to the SAN via parasympathetic nervous system
SAN will decrease number of impulses slowing the heart rate