AQA BTEC APPLIED SCIENCE: THE HEART QUESTIONS AND ANSWERS WITH SOLUTIONS 2024

AQA BTEC APPLIED SCIENCE: THE
HEART QUESTIONS AND ANSWERS
WITH SOLUTIONS 2024
What is the heart made of? - ANSWER cardiac muscle

What does the heart contain? - ANSWER two pumps

Where does the right side of the heart pump blood to? - ANSWER lungs

Where does the left side of the heart pump blood to? - ANSWER all around the body

What are the top chambers of the heart known as? - ANSWER atria

What are the lower chambers of the heart known as? - ANSWER ventricles

What do valves in the heart do? - ANSWER stop blood going backwards

What type of muscular wall do atria have? - ANSWER thin

what type of muscular wall do ventricles have? - ANSWER thick

How does the heart work? - ANSWER -blood enters atria from the veins during diastole
-passes into the ventricles
-atria contract and push blood into the ventricles
-ventricle muscle contracts and blood is pushed out of the heart through arteries
-right and left sides pump together

What side pumps oxygenated blood? - ANSWER left

What side pumps deoxygenated blood? - ANSWER right

What is the heart tissue? - ANSWER myogenic (beats by itself)

What can the activity of the heart be controlled by? - ANSWER cardiovascular centre in the medulla of
the brain

What do the chemoreceptors in the main blood vessels do? - ANSWER detect the level of CO2

What happens if there are high levels of CO2? - ANSWER -lead to impulses being sent to the medulla
-medulla sends impulses to the SAN and makes it speed up the heart rate

What is an increase in CO2 caused by? - ANSWER exercise

What do baroreceptors in the main blood vessels do? - ANSWER -detect higher than normal blood
pressure