The Urinary System Structure And Functions Quiz!
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What do you know about the urinary system, its structure, and functions? Urine is formed in the kidneys. It flows from the kidneys, through the bilateral ureters, and into the urinary bladder. Urine is the fluid waste product of the human body, and it is a result of metabolism in humans and many other animals. If you would choose to discover more regarding the urinary system, this is the quiz for you.
- 1.
Which part of the kidney is responsible for urine production?
- A.
Ureters
- B.
Pelvis
- C.
Nephrons
- D.
Capsule
Correct Answer
C. NephronsExplanation
The nephrons are responsible for urine production in the kidney. These microscopic structures filter waste products, excess water, and other substances from the blood. They also reabsorb necessary nutrients and regulate the balance of electrolytes in the body. The nephrons consist of a renal corpuscle and a renal tubule, which work together to filter and process the blood to produce urine.Rate this question:
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- 2.
What term is used to describe the fluid in the renal tubules?
- A.
Filtrate
- B.
Solvent
- C.
Plasma
- D.
Urine
Correct Answer
A. FiltrateExplanation
The term used to describe the fluid in the renal tubules is "filtrate." This refers to the fluid that is formed by the filtration of blood in the glomerulus of the kidney. It contains water, electrolytes, and waste products, but does not include larger molecules such as proteins. The filtrate is further processed and modified as it passes through the renal tubules, eventually leading to the formation of urine.Rate this question:
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- 3.
Which of the following is NOT a function of the kidneys?
- A.
Fluid and electrolyte balance
- B.
Maintenance of pH balance
- C.
Regulation of blood pressure
- D.
Production of adrenaline
Correct Answer
D. Production of adrenalineExplanation
The kidneys are responsible for maintaining fluid and electrolyte balance, regulating pH balance, and controlling blood pressure. However, the production of adrenaline is not a function of the kidneys. Adrenaline is produced by the adrenal glands, which are located on top of the kidneys. These glands release adrenaline in response to stress or danger, helping to prepare the body for a fight-or-flight response.Rate this question:
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- 4.
What is the name of the cup-like structure surrounding the glomerulus?
- A.
Distal convoluted tubule
- B.
Glomerular (or Bowman's) capsule
- C.
Renal capsule
- D.
Glomerular membrane
Correct Answer
B. Glomerular (or Bowman's) capsuleExplanation
The cup-like structure surrounding the glomerulus is called the glomerular (or Bowman's) capsule. It is a part of the renal corpuscle, which is responsible for the initial filtration of blood in the kidney. The glomerular capsule receives the filtered blood from the glomerulus and helps in the formation of urine by collecting the filtrate and passing it on to the renal tubules for further processing.Rate this question:
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- 5.
The processes responsible for urine production that take place in the nephron are
- A.
Secretion and digestion
- B.
Reabsorption and selection
- C.
Ultrafiltration and selective reabsorption
- D.
Filtration and peristalsis
Correct Answer
C. Ultrafiltration and selective reabsorptionExplanation
Ultrafiltration is the process in which blood is filtered in the glomerulus of the nephron, allowing small molecules such as water, ions, and waste products to pass through into the renal tubules. Selective reabsorption, on the other hand, is the process in which certain substances, such as glucose, amino acids, and ions, are reabsorbed back into the bloodstream from the renal tubules. Together, ultrafiltration and selective reabsorption are the key processes responsible for urine production in the nephron.Rate this question:
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- 6.
Where in the renal tubule does ultrafiltration take place?
- A.
Glomerular (Bowman's) capsule
- B.
Proximal convoluted tubule
- C.
Loop of Henle
- D.
Distal convoluted tubule
Correct Answer
A. Glomerular (Bowman's) capsuleExplanation
Ultrafiltration takes place in the glomerular (Bowman's) capsule. The glomerular capsule is the initial part of the renal tubule where the glomerulus, a network of capillaries, filters blood under high pressure. This filtration process allows small molecules such as water, ions, and waste products to pass through the filtration membrane into the capsule while retaining larger molecules such as proteins and blood cells. The filtered fluid, known as the glomerular filtrate, then proceeds through the rest of the renal tubule for further processing and reabsorption.Rate this question:
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- 7.
Where in the renal tubule does the reabsorption of most substances take place?
- A.
Glomerular (Bowman's) capsule
- B.
Proximal convoluted tubule
- C.
Loop of Henle
- D.
Distal convoluted tubule
Correct Answer
B. Proximal convoluted tubuleExplanation
The proximal convoluted tubule is responsible for the reabsorption of most substances in the renal tubule. This is because it has a large surface area and is lined with microvilli, which increase the absorption capacity. Additionally, the proximal convoluted tubule is located immediately after the glomerular (Bowman's) capsule, allowing for efficient reabsorption of filtered substances before they continue through the rest of the nephron.Rate this question:
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- 8.
What is the name of the blood vessels that bring blood into the kidneys?
- A.
Hepatic arteries
- B.
Renal arteries
- C.
Pulmonary arteries
- D.
Carotid arteries
Correct Answer
B. Renal arteriesExplanation
The correct answer is renal arteries. The renal arteries are the blood vessels that bring blood into the kidneys. These arteries branch off from the abdominal aorta and supply oxygenated blood to the kidneys for filtration and waste removal.Rate this question:
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- 9.
Which of the following substances are all found in the urine of a healthy person?
- A.
Water, salt, toxins, erythrocytes
- B.
Water, urea, proteins, uric acid
- C.
Urea, uric acid, inorganic ions
- D.
Urea, uric acid, glucose, inorganic ions
Correct Answer
C. Urea, uric acid, inorganic ionsExplanation
Urea and uric acid are waste products that are normally found in urine. Inorganic ions, such as sodium, potassium, and chloride, are also present in urine. Glucose, erythrocytes (red blood cells), and proteins are not typically found in the urine of a healthy person.Rate this question:
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- 10.
Which of the following hormones all play a part in regulating reabsorption in the renal tubules?
- A.
ADH, aldosterone, calcitonin
- B.
ADH, ACTH, aldosterone
- C.
ADH, somatotropin, thyroxine
- D.
ACTH, aldosterone, androgens
Correct Answer
A. ADH, aldosterone, calcitoninExplanation
ADH (antidiuretic hormone), aldosterone, and calcitonin all play a part in regulating reabsorption in the renal tubules. ADH acts on the collecting ducts to increase water reabsorption, aldosterone acts on the distal convoluted tubules and collecting ducts to increase sodium reabsorption, and calcitonin helps regulate calcium reabsorption in the renal tubules. These hormones work together to maintain the balance of water and electrolytes in the body by regulating reabsorption in the renal tubules.Rate this question:
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- 11.
Which of the following is NOT an electrolyte?
- A.
Calcium
- B.
Melatonin
- C.
Potassium
- D.
Sodium
Correct Answer
B. MelatoninExplanation
Melatonin is not an electrolyte because it is a hormone produced by the pineal gland in the brain, and it does not dissociate into ions in solution. Electrolytes, on the other hand, are substances that can conduct electricity when dissolved in water or melted. Calcium, potassium, and sodium are all electrolytes as they dissociate into ions when dissolved in water and can carry electric current.Rate this question:
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- 12.
A diuretic is a substance which
- A.
Stimulates an increase in urine production
- B.
Stimulates a decrease in urine production
- C.
Reduces the amount of water in the urine
- D.
Increases the amount of salt in the urine
Correct Answer
A. Stimulates an increase in urine productionExplanation
A diuretic is a substance that stimulates an increase in urine production. This means that it helps the body get rid of excess fluid by increasing the amount of urine that is produced. This can be beneficial for individuals who have conditions such as high blood pressure or edema, as it helps to reduce fluid buildup in the body. Diuretics work by increasing the filtration rate in the kidneys, which leads to more water and salt being excreted in the urine.Rate this question:
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- 13.
The tube that discharges urine from the body is the
- A.
Collecting duct
- B.
Ureter
- C.
Urethra
- D.
Bladder
Correct Answer
C. UrethraExplanation
The urethra is the tube that carries urine from the bladder to the outside of the body. It is responsible for the elimination of urine from the body. The collecting duct is a part of the kidney that helps in the concentration of urine. The ureter is a tube that connects the kidney to the bladder, allowing urine to flow from the kidney to the bladder. The bladder is a muscular organ that stores urine until it is ready to be discharged.Rate this question:
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- 14.
The action of ADH (anti diuretic hormone) is to
- A.
Increase permeability of collecting ducts to water
- B.
Decrease permeability of collecting ducts to water
- C.
Increase filtration of water by glomerular capsule
- D.
Decrease filtration of water by glomerular capsule
Correct Answer
A. Increase permeability of collecting ducts to waterExplanation
ADH, also known as vasopressin, acts on the collecting ducts in the kidneys to increase their permeability to water. This means that more water can be reabsorbed from the urine back into the bloodstream, resulting in a decrease in urine volume and a more concentrated urine. This mechanism helps to regulate water balance in the body and prevent excessive water loss.Rate this question:
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- 15.
Which of the following would tend to increase urine production?
- A.
Increased activity levels
- B.
Increased body temperature
- C.
Decreased water consumption
- D.
Increased water consumption
Correct Answer
D. Increased water consumptionExplanation
Increased water consumption would tend to increase urine production because when the body receives more water, it needs to eliminate the excess fluid. This leads to an increase in the filtration rate of the kidneys, resulting in more urine being produced.Rate this question:
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