Biology; Chemistry; Physics: Post your doubts here!

[funky brat]

For this question, you were supposed to know that Iron Oxide can be electrolysed, too. I mean why can't it be electrolysed? It is an ionic compoud, with Iron and Oxide ions, arranged to form an ionic lattice. Iron Oxide can be melted, and then Molten Iron Oxide can be Electrolysed to get Oxygen at the Anode, Iron at the Cathode, but then why is the BLAST FURNACE used?

Chemists always look for ways to save energy. To save resources. That is why they found an easier way to Extract Iron, a method that does not require huge amounts of electricity. And that is the chemical reduction in the Blast Furnace.

Alright. Thanks.

 

[Nabeel.Ahmad]

thats what step 2 is for people ​

First step just ensure you know what to write in atleast 75% questions
Nae mananee baat to na mano, mujhay iss kee tankhwah nae milnee

What grade are you aiming for?

 

[black widow]

What grade are you aiming for?

everybody aims for A* i guess

 

[Nabeel.Ahmad]

everybody aims for A* i guess

True.

 

[Faizan Muhammmad]

What grade are you aiming for?

To A* and beyond

 

[black widow]

To A* and beyond

enna tu buzz lightyear

 

[black widow]

i have read that the pancreas is both an endocrine and exocrine gland. How is it an exocrine gland?

 

[asadalam]

Endocrine glands secrete something (hormones) into the blood stream, and there is NO duct involved. That is the definition of endocrine function; ductless secretion.

Exocrine function is by definition secretion of something via a duct.

The pancreas gland makes insulin, glucagon, somatostatin, and pancreatic polypeptide, all of which are secreted into the blood stream without ducts, and are therefore endocrine hormones.

The pancreas also makes digestive enzymes, which are collectively known as pancreatic juice, and are secreted into the duodenum of the small intestine through a duct. Therefore, this is an exocrine function.

 

[black widow]

Endocrine glands secrete something (hormones) into the blood stream, and there is NO duct involved. That is the definition of endocrine function; ductless secretion.

Exocrine function is by definition secretion of something via a duct.

The pancreas gland makes insulin, glucagon, somatostatin, and pancreatic polypeptide, all of which are secreted into the blood stream without ducts, and are therefore endocrine hormones.

The pancreas also makes digestive enzymes, which are collectively known as pancreatic juice, and are secreted into the duodenum of the small intestine through a duct. Therefore, this is an exocrine function.

but exocrine glands secrete their secretions out of the body
i was asking what does the pancreas secrete out of the body?

 

[asadalam]

but exocrine glands secrete their secretions out of the body
i was asking what does the pancreas secrete out of the body?

Not necessarily,as that concept is not right.Exocrine glands have DUCTS while endo- are ductless,thats the main difference not where they supply their secretions.

 

[black widow]

Not necessarily,as that concept is not right.Exocrine glands have DUCTS while endo- are ductless,thats the main difference not where they supply their secretions.

yes i do know that
but all exocrine glands secrete their secretions out of the body
take the sweat gland for example, it is an exocrine gland, and secretes sweat out of the body
Exocrine glands are glands that secrete their products (excluding hormones and other chemical messengers) into ducts (duct glands) which lead directly into the external environment.

 

[Faizan Muhammmad]

yes i do know that
but all exocrine glands secrete their secretions out of the body
take the sweat gland for example, it is an exocrine gland, and secretes sweat out of the body
Exocrine glands are glands that secrete their products (excluding hormones and other chemical messengers) into ducts (duct glands) which lead directly into the external environment.

pancreatic juice genius
where does it go??

 

[black widow]

pancreatic juice genius
where does it go??

in the intestine genius
but it says that exocrine glands secrete their excretions out of the body, and as far as i am concerned pancreatic juice is not secreted out of the body

 

[asadalam]

http://en.wikipedia.org/wiki/Exocrine_gland

An Exocrine gland is distinguished by the fact that it excretes its essential product by way of a duct to some environment external to itself, be it either inside the body or on a surface of the body.

 

[Faizan Muhammmad]

in the intestine genius
but it says that exocrine glands secrete their excretions out of the body, and as far as i am concerned pancreatic juice is not secreted out of the body

where does stuff from intestine go? (genius)^2

 

[black widow]

where does stuff from intestine go? (genius)^2

in to the blood capillaries and lymphatic capillaries (genius)^2
let me just complete it
from there to the liver, and then to muscles.
so the secretion is still in the intestine, as enzymes remain chemically unchanged (genius)^3

 

[Nabeel.Ahmad]

in to the blood capillaries and lymphatic capillaries (genius)^2
let me just complete it
from there to the liver, and then to muscles.
so the secretion is still in the intestine, as enzymes remain chemically unchanged (genius)^3

Well, i'm not much of a Biology-master, but Pancreatic Juice has enzymes which are not absorbed in the small intestine. They do their work in digestion, and the useful substances are absorbed through the small intestine. I don't think that includes Bile, or Pancreatic Juice, or any such secretion.

And Asadalam's previous post, clears everything up.

 

[Faizan Muhammmad]

in to the blood capillaries and lymphatic capillaries (genius)^2
let me just complete it
from there to the liver, and then to muscles.
so the secretion is still in the intestine, as enzymes remain chemically unchanged (genius)^3

the enzymes or bile are not absorbed they are removed out with faeces

 

[black widow]

the enzymes or bile are not absorbed they are removed out with faeces

whatever forget it now
don't want to extend this argument

 

[Faizan Muhammmad]

whatever forget it now
don't want to extend this argument

abb samajh agayee hai iss liyah kah raha hai