Respiratory and Circulatory System Q&A Quiz 3

RESPIRATORY AND CIRCULATORY SYSTEM
QUIZ 3


Question 1
● Which is used to diagnose hypertension in adults?
BLOOD PRESSURE OF >140 MM HG SYSTOLIC AND/OR >90 DIASTOLIC


Question 2
● Damage to the sinoatrial node in humans
WOULD DISRUPT THE RATE AND TIMING OF CARDIAC MUSCLE
CONTRACTIONS.


Question 3
● The blood level of which gas is most important in controlling human respiration
rate?
CARBON DIOXIDE


Question 4
● A human red blood cell in an artery of the left arm is on its way to deliver oxygen
to a cell in the thumb. From this point in the artery, how many capillary beds must
this red blood cell pass through before it returns to the left ventricle of the heart?
TWO


Question 5
● Why is the velocity of blood flow the lowest in capillaries?
THE TOTAL SURFACE AREA OF THE CAPILLARIES IS LARGER THAN THE
TOTAL SURFACE AREA OF THE ARTERIOLES.