Tag: properties of urine and regulation of urine formation

Questions Related to properties of urine and regulation of urine formation

Which is correct

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

  1. An increase in glomerular blood flow stimulates formation of angiotensin II

  2. During summer, when body loses a lot of water by evaporation, the release of ADH is suppressed

  3. When someone drinks a lot of water, ADH release is suppressed

  4. Exposure to cold temperature stimulates ADH release

Show answer
Correct Option: C
Explanation:

When excess water is lost through urine the blood volume is decreased and its osmolarity is increased which stimulates the posterior pituitary to release ADH.ADH decreases the volume of urine by increasing the reabsorption by kidneys and prevents diuresis. Hence when someone drinks a lot of water, ADH release is suppressed.

So, the correct answer is 'When someone drinks a lot of water, ADH release is suppressed'

Which of the following hormone helps to prevent the diuresis?

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

  1. FSH

  2. LH

  3. MSH

  4. ADH

Show answer
Correct Option: D
Explanation:

The term diuresis refers to the excessive production of urine. When excess water is lost through urine the blood volume is decreased and its osmolarity is increased which stimulates the posterior pituitary to release ADH.ADH decreases the volume of urine by increasing the reabsorption by kidneys and prevents diuresis. Hence it is also called antidiuretic hormone.

So, the correct answer is 'ADH'.

Concentration of urine is controlled by

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

  1. ACTH

  2. MSH

  3. ADH

  4. Oxytocin

Show answer
Correct Option: C
Explanation:
The hormone ADH (vasopressin) is released from the neurohypophysis (posterior pituitary gland). ADH is synthesized by the hypothalamus and stored in the neurohypophysis. When blood volume is decreased or sodium concentration of blood is increased due to dehydration the ADH is released from the neurohypophysis. ADH causes retention of water by kidneys and maintains blood volume. Hence concentration of urine is controlled by ADH.
So, the correct answer is 'ADH'.

The hormone ADH is released from the 

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

  1. Adenohypophysis

  2. Neurohypophysis

  3. Adrenal gland

  4. None of the above

Show answer
Correct Option: B
Explanation:

The hormone ADH (vasopressin) is released from the neurohypophysis (posterior pituitary gland). ADH is synthesized by the hypothalamus and stored in the neurohypophysis. When blood volume is decreased or sodium concentration of blood is increased due to dehydration the ADH is released from the neurohypophysis. ADH causes retention of water by kidneys and maintains blood volume.

So, the correct answer is 'Neurohypophysis'.

Facultative absorption of water from primary urine is influenced by the hormone

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

  1. Androgens

  2. Epinephrine

  3. Vasopressin

  4. Thyroxine

Show answer
Correct Option: C
Explanation:

When excess water is lost through urine the blood volume is decreased and its osmolarity is increased which stimulates the posterior pituitary to release vasopressin. Vasopressin(ADH) decreases the volume of urine by increasing the facultative absorption of water by kidneys and prevents diuresis. Hence facultative absorption of water from primary urine is influenced by the hormone vasopressin.

So, the correct answer is 'Vasopressin'.

Intake of ORS inhibits secretion of

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

  1. Vasopressin

  2. Oxytocin

  3. Melatonin

  4. Thyroxine

Show answer
Correct Option: A
Explanation:

When excess water is lost through urine the blood volume is decreased and its osmolarity is increased which stimulates the posterior pituitary to release Vasopressin. Vasopressin(ADH) decreases the volume of urine by increasing the facultative absorption of water by kidneys and prevents diuresis. ORS (oral rehydration salt) replaces the lost fluids and essential salts, prevent dehydration and maintain blood volume. Hence Intake of ORS inhibits secretion of vasopressin.

So, the correct answer is 'Vasopressin'.

The juxta glomerular apparatus is a special region formed by close placement and cellular modification in 

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

  1. Proximal convoluted tubule and distal convoluted tubule

  2. Loop of Henle and collecting duct

  3. Afferent arteriole and distal convoluted tubule

  4. Afferent arteriole and proximal convoluted tubule

Show answer
Correct Option: C
Explanation:

The juxta glomerular apparatus is a specialised structure made by the glomerular afferent arteriole and the distal convoluted tubule.It is located near the vascular pole of the glomerulus .The main function of juxta glomerular apparatus is to regulate the filteration rate of glomerulus and blood pressure of the body. 

A fall in glomerular filtration rate (GFR) activates

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

  1. Adrenal cortex to release aldosterone

  2. Adrenal medulla to release adrenaline

  3. Posterior pituitary to release vasopressin

  4. Juxta glomerular cells to release renin

Show answer
Correct Option: D

Antidiuretic hormone is also known as ______________.

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

  1. Secretin

  2. Vasopressin

  3. Gastrin

  4. Renin

Show answer
Correct Option: A

Angiotensinogen is a protein produced and secreted by

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

  1. Macula densa cells

  2. Endothelial cells

  3. Liver cells

  4. Juxtaglomerular 

Show answer
Correct Option: C
Explanation:

Angiotensinogen is a plasma protein produced and released into the circulation by the liver cells. It is also known as renin substrate. It is the component of the renin-angiotensin system, a hormone system which regulates blood pressure and fluid balance. So, the correct answer is 'Liver cells'.