Tag: regulation of urine formation

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Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Osmoregulation is carried out by

  1. Ureter

  2. Nephron

  3. ACTH

  4. ADH
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The maintenance of constant osmotic pressure in the fluids of an organism by the control of water and salt concentrations. is called Osmoregulation. It  is carried out by 'anti-diuretic hormone'. 

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Vasopressin is responsible for :-

  1. Making urine dilute

  2. Dialating the blood vessel

  3. Decreasing filtrate concentration in PCT

  4. Increasing blood pressure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vassopressin or anti-diuretic hormone helps prevent loss of water from the body by increasing the reabsorption of water from the kidney and making urine more concentrated. It is also responsible for increasing the blood pressure by constricting the blood vessels. So, the correct option is 'increasing blood pressure'.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Acidification of urine occurs in

  1. Proximal tubule

  2. Distal tubule

  3. Loop of henle

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The proximal convoluted tubule is the primary site for the reabsorption of bicarbonate and the secretion of hydrogen ions, which contributes to the acidification of urine.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Choose the odd one out from given option.

  1. Renin

  2. ANF

  3. ADH

  4. Aldosterone
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. Renin is an aspartic protease protein as well as an enzyme which is secreted by the kidneys in the Renin-angiotensin-aldosterone system that regulates the arterial blood pressure.

B. ANF is called the Atrial natriuretic factor, it is a polypeptide hormone (28 amino-acid) is secreted by the atria of the heart in response and acts on the kidney to increase sodium excretion and to inhibit renin secretion.
C. ADH is called Anti-diuretic hormone or vasopressin which produced by the hypothalamus and it regulates and balances the amount of water in the blood.
D. Aldosterone is a mineralocorticoid steroid hormone produced by the adrenal gland which helps in the conservation of sodium in the kidney, salivary glands, sweat glands and colon.
Except for Renin, all others are hormones.
  • So, the correct answer is 'Renin'.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

The opening of urinary bladder is called?

  1. Uriniferous tubule

  2. Nephron

  3. Urethra

  4. Ureter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The urinary bladder stores urine collected from the ureters and expels it to the exterior through the urethra, which represents the terminal opening and passage of the urinary tract.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Glomerular filtration rate would be decreased by:

  1. an increase in renal blood flow

  2. Compression of the renal capsule

  3. An increase in afferent arteriolar pressure

  4. Constriction of the efferent arteriole
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Glomerular filtration rate (GFR) is driven by net filtration pressure. Compression of the renal capsule increases hydrostatic pressure in the Bowman space, which opposes filtration and thus decreases GFR.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

Drinking of which would lead to the highest rate of ADH secretion?

  1. Distilled water

  2. Sea water

  3. Isotonic water

  4. Alcohol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Drinking sea water increases blood osmolarity due to its high salt concentration, which strongly stimulates osmoreceptors in the hypothalamus to secrete antidiuretic hormone (ADH) to conserve water. Distilled water would lower osmolarity and decrease ADH secretion, while isotonic water causes little change.

Multiple choice zoology excretion and osmoregulation regulation of urine formation properties of urine and regulation of urine formation coordination in human beings- chemical control

In the vertebrates, the hormones which control osmoregulation are?

  1. Vasopressin and thyrotropin

  2. Aldosterone and corticotropin

  3. Thyrotropin and corticotropin

  4. Vasopressin and aldosterone
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Kidneys play a very large role in human osmoregulation by regulating the amount of water reabsorbed from glomerular filtrate in kidney tubules, which is controlled by hormones such as antidiuretic hormone(ADH), aldosterone and corticotropin. 

So, the correct answer is 'Aldosterone and corticotropin'