Endocrine Communication

  • Created by: Esme.B
  • Created on: 14-10-17 13:29
what is the endocrine system?
Anything to do with hormones, type of communication system. (target tisses:complementry receptors), blood used in transport& gland without ducts
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What is the Exocrine system?
Secretion of substances, i.e; sweat, saliva, tears, enzyme. Glands with ducts
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What are the 2 types of hormone?
Protein/peptide and steroid
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Which type of hormone is not soluble in the phospholipid membrane?
Protein
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Testosterone is an example of what type of hormone?
Steroid
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Which type of gland is ductless; endocrine or exocrine?
Endocrine
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Which cells will respond to hormones?
Target cells that possess correct complementary receptor
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Which type of adrenergic receptor produces an inhibitory response; alpha or beta?
Beta
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What type of hormone are known as first messengers?
Non-steroid (i.e. protein)
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What type of protein is activated when a hormone binds to a receptor?
G protein
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Which enzyme converts ATP to cAMP?
Adenyl cyclase
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What triggers a cascade of enzyme controlled reactions within a cell?
A second messenger such as cAMP
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list six glands and the hormones they produce.
1. testes:testosterone 2.Ovaries:oestrogen&progesterone 3.thyroid gland:thyroxin 4.adrenal gland:adrenaline 5.pancreas:insulin&glucagon 6.pituitary gland:FSH&LH
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How does Steroid hormones, enter the cell?
Diffuse across the plasma membrane and interact with our expression of DNA
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How does protein hormones, enter the cell?
cannot diffuse through, bind with a complementary receptor- triggering a reaction- i.e;glycoprotein. A secondary messenger is required.
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List an example of a secondary messenger in protein hormones.
G-protein: activates=activates an enzyme= adenyl cycles:changes ATP to CAMP. Triggers a cascade of enzyme controlled reactions.
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What is the difference between endocrine and exocrine glands?
Exocrine glands secrete substances (often enzymes) into a duct, which leads to a point of action Endocrine glands secrete hormones directly into the blood.
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What is the relationship between the first messenger and the receptor that it binds with?
They have complementary shapes. The receptor is found on the plasma membrane of the target cells for that hormone.
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Explain why target cells and tissues must have specific receptors on their cell They have complementary shapes. The receptor is found on the plasma membrane of the target cells for that hormone. surface membranes
So that the correct hormone can bind, and no other molecule will be able to bind and have the same effect.
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Explain the difference between first messengers and second messengers.
First messengers are hormones (cell signalling molecules) that carry a signal around the body in the blood. Second messengers are molecules inside the cells that activate an enzyme cascade.
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Why are steroid hormones able to enter the cell?
hey are synthesised from lipid-based molecules, such as cholesterol and are soluble in fats. This means they can dissolve in the phospholipid bilayer.
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Other cards in this set

Card 2

Front

What is the Exocrine system?

Back

Secretion of substances, i.e; sweat, saliva, tears, enzyme. Glands with ducts

Card 3

Front

What are the 2 types of hormone?

Back

Preview of the front of card 3

Card 4

Front

Which type of hormone is not soluble in the phospholipid membrane?

Back

Preview of the front of card 4

Card 5

Front

Testosterone is an example of what type of hormone?

Back

Preview of the front of card 5
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