Explain how pressure differences in the heart ensure sufficient pumping of blood into the arteries. (3)

increased pressure in the ventricles the pressure in the ventricles is higher than the pressure in the atria causing the atrioventricular valves to closecausing the semilunar valves to open and the blood flows into the arteries -

KW
Answered by Kelly W. Biology tutor

3434 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Can you explain the importance of the refractory period within the axon?


Tetrodotoxin (TTX) is a chemical found in pufferfish which binds to voltage-gated sodium channels causing inactivation via a conformational change. Poisoning can result in paralysis leading to death. How might this occur? (4 marks)


Outline the action of B lymphocytes following initial contact with an antigen or antigen presenting cell. (6 marks)


Explain how increased blood CO2 leads to an increased heart rate


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences