Respiratory
We breathe due to changes in ______ levels
CO2
Where are all blood cells made?
red bone marrow
What blood vessels carry blood away from the heart?
arteries
T or F
Regulating blood volume and pressure is a homeostatic function of the urinary system
True
What reduces the surface tension of water in the alveoli?
surfactant
Where does the left atrium receive blood from?
pulmonary veins
What hormone stimulates red blood cell production to carry more O2?
erythropoietin
What do macula densa cells do?
sense changes in NaCl
Elasticity
Erythropoietin is a hormone released by the ______ in response to ______.
kidneys; hypoxia (lowered oxygen concentration)
What are three important sources of resistance?
1) blood viscosity
2) total blood vessel length
3) blood vessel diameter/radius
What is the stimulus for renin?
low blood pressure
What are three ways CO2 is transported in blood?
1) dissolved in plasma as CO2
2) bound to hemoglobin Hb-CO2
3) As HCO3- in plasma
these white blood cells are first responders and fight bacterial infection
neutrophils
T or F
The lungs are collapsed in fetal circulation
True
if colloid osmotic pressure increases, filtration ______-
decreases
What kind of receptors respond to changes in lung volume?
stretch receptors
chordae tendineae
What is perfusion pressure seen by organs in the body known as?
Mean Arterial Pressure (MAP)
What is the cause of respiratory alkalosis?
hyperventilation due to oxygen deficiency from high altitude or pulmonary disease, stroke, or severe anxiety