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Renal System and Hormonal Regulation Quiz

#1

Which hormone is responsible for increasing blood pressure by promoting sodium reabsorption in the kidneys?

Aldosterone
Explanation

Aldosterone promotes sodium reabsorption in the kidneys, leading to increased blood pressure.

#2

Where does filtration occur in the nephron?

Bowman's capsule
Explanation

Filtration occurs in Bowman's capsule, the initial part of the nephron.

#3

What is the functional unit of the kidney responsible for filtration, reabsorption, and secretion?

Nephron
Explanation

The nephron is the functional unit of the kidney, responsible for filtration, reabsorption, and secretion.

#4

Which hormone stimulates the production of red blood cells in the bone marrow and is produced in response to low oxygen levels in the blood?

Erythropoietin
Explanation

Erythropoietin stimulates red blood cell production in the bone marrow in response to low blood oxygen levels.

#5

What is the function of the glomerulus in the nephron?

Filtration of blood
Explanation

The glomerulus in the nephron is responsible for the initial filtration of blood.

#6

Which of the following hormones regulates blood calcium levels?

Parathyroid hormone (PTH)
Explanation

Parathyroid hormone (PTH) regulates blood calcium levels by increasing calcium release from bones and absorption in the intestines.

#7

What is the primary function of antidiuretic hormone (ADH) in the kidneys?

Promote water reabsorption
Explanation

Antidiuretic hormone (ADH) promotes water reabsorption in the kidneys, reducing urine volume.

#8

Which enzyme produced by the kidneys plays a role in regulating blood pressure by converting angiotensinogen to angiotensin I?

Renin
Explanation

Renin is produced by the kidneys and converts angiotensinogen to angiotensin I, regulating blood pressure.

#9

Which hormone is produced by the juxtaglomerular cells of the kidney in response to low blood pressure or low sodium levels?

Renin
Explanation

Renin is produced by juxtaglomerular cells in response to low blood pressure or sodium levels, initiating the renin-angiotensin-aldosterone system.

#10

Which part of the nephron is responsible for the reabsorption of water and ions?

Loop of Henle
Explanation

The Loop of Henle is responsible for the reabsorption of water and ions in the nephron.

#11

Which structure connects the kidneys to the bladder?

Ureter
Explanation

The ureter connects the kidneys to the bladder, facilitating the flow of urine.

#12

Which of the following is NOT a function of the kidneys?

Production of insulin
Explanation

The kidneys do not produce insulin; their functions include filtration, reabsorption, and secretion of substances in the urine.

#13

What is the hormone responsible for stimulating uterine contractions during childbirth and milk ejection during breastfeeding?

Oxytocin
Explanation

Oxytocin is the hormone responsible for stimulating uterine contractions during childbirth and milk ejection during breastfeeding.

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