B2 Keeping Healthy part 2

HideShow resource information
  • Created by: 1i22y
  • Created on: 27-01-16 20:30

1. what does the lumen do

  • ensure it is smooth to allow efficient blood flow
  • recoil, which allows normal conditions to return after contraction
  • ensure that there is thick outer walls to protect them from bursting due to high pressure
  • contract and increase blood pressure
1 of 20

Other questions in this quiz

2. what is homeostasis

  • keeping a constant internal environment
  • keeping a constant external environment
  • keeping an non constant internal/external environment

3. what is an open-label trial

  • doctors know who is in which group but patients do not
  • both the patient and the doctor know whether the patient is given the new drug. these trials are used when the patient cannot affect the outcome of using the drug
  • neither doctors or patients know who is in which group

4. what does the elastic fibres of an artery do

  • ensure that there is thick outer walls to protect them from bursting due to high pressure
  • ensure it is smooth to allow efficient blood flow
  • recoil, which allows normal conditions to return after contraction
  • contract and increase blood pressure

5. why is the amount of muscle and elastic fibres small

  • because high pressure does not need to be maintained as the blood is at a lower pressure in veins than in arteries
  • because there is less blood being pumped from th right lower chamber
  • because there is more fat surrounding themwhat do cappilaries do

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Microbes and disease resources »