Exploring Glomerular Filtration Rate and Kidney Function

Dr. O explains the importance of glomerular filtration rate (GFR) in kidney function. The video covers how cardiac output affects kidney blood flow, the mechanics of glomerular filtration, and the sensitivity of kidneys to blood pressure changes. It also discusses the stages of kidney disease based on GFR and methods to measure GFR using inulin and creatinine.

What percentage of cardiac output is directed to the kidneys in a healthy individual?

• 20-25%

• 40-45%

• 30-35%

• 10-15%

How much blood should ideally reach the kidneys per minute in a healthy person?

• 1250 ml

• 1000 ml

• 750 ml

• 500 ml

Tags

NGSS.HS-LS1-3

What is the normal glomerular filtration rate (GFR) in a healthy individual?

• 120 ml/min

• 110 ml/min

• 100 ml/min

• 90 ml/min

Tags

NGSS.HS-LS1-3

What is the primary factor that influences the glomerular filtration rate?

• Blood pressure

• Heart rate

• Respiratory rate

• Body temperature

What happens to the GFR if the blood pressure in the kidneys drops by 10 mm Hg?

• It becomes zero

• It doubles

• It increases

• It remains the same

Tags

NGSS.HS-LS1-3

Which system is activated in response to a drop in blood pressure to maintain kidney function?

• Central nervous system

• Parasympathetic nervous system

• Renin-angiotensin-aldosterone system

• Sympathetic nervous system

Tags

NGSS.HS-LS1-3

At what GFR value does stage 4 kidney disease occur?

• 60-89 ml/min

• Below 15 ml/min

• 30-59 ml/min

• 15-29 ml/min

What is the GFR range for stage 1 kidney disease?

• 90 or higher

• 60-89

• 30-59

• 15-29

Which substance is commonly used to estimate GFR due to its non-reabsorption by the kidneys?

• Inulin

• Glucose

• Urea

• Creatinine

Why is creatinine a good indicator for estimating GFR?

• It is reabsorbed by the kidneys

• It is secreted by the kidneys

• It is neither reabsorbed nor secreted by the kidneys

• It is a protein