Endocrine System
2011
Summary
Body conditions are controlled by
which systems?
1. The nervous system
2. The endocrine system
What are glands?
• Glands are structures that
secrete substances
Name the 2 types of glands?
• Exocrine
• Endocrine
What is the difference between an
exocrine and endocrine gland?
•
Exocrine – release their products into
ducts
•
Endocrine – release their products
(hormones) directly into the
bloodstream
Which gland is both exocrine and
endocrine?
•
Pancreas
Give 2 examples of exocrine
glands?
•
•
•
•
Salivary glands
Mammary glands
Gastric glands
Sweat glands
What is a hormone?
•
•
•
•
•
Chemical messenger
Made of protein or steroid
Produced by endocrine gland
Carried in the bloodstream
To where is has a specific effect
Compare the Nervous system and
the Endocrine system?
Feature
Speed of Response
Method by which
message is carried
Speed of message
Duration of
response
Location affected
Nervous System
Endocrine System
Can you name the 10 major endocrine
glands
A
C
D
E
G
H
I
J
K
B
Can you name a hormone secreted
from each gland
ADH
FSH, LH, GH
Parathormone
Thyroxine
Thymosin
Adrenaline
Insulin
Oestrogen
Testosterone
Melatonin
For a named hormone describe:
(i) Deficiency symptoms
(ii) Excess symptoms
(iii) Corrective measures?
•
Thyroxine – from thyroid, controls metabolism
•
Deficiency symptoms – reduced metabolism, lack
of energy, weight gain, myxoedemia & goitre
Corrected by – Thyroxine tablets or iodine
•
•
•
Excess symptoms – increased metabolic rate,
weight loss, bulging eyes, anxiety, Graves’ disease
Corrected by – surgery removing part of thyriod
How are Thyroxine levels controlled in
the body?
•
•
•
•
•
Negative feedback
Low Thyroxine levels stimulate the
pituitary to release TSH
Thyroid produces Thyroxine
Normal Thyroxine levels inhibit TSH
Thyroid wont produce Thyroxine
What are anabolic steroids?
What is the danger with using them?
•
•
Drugs that build up muscle
Can lead to liver & adrenal
disorders