Summary
Summary OCR A Biology hormonal communication
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This document has everything you need to know about hormonal communication. The notes are concise and based of the mark schemes of previous years.
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Types of glands2 3
Endocrine Exocrine
secretes hormones produces digestive Nices
-
-
-directly
into
the blood -released into ducts which
-
ductless carries it another
to
place
Types of hormones
steroid
L
Peptide / lipid based hormone
-cannot pass through -can pass through the membrane
the membrane -Acts upon the but
in the nucleus
-
uses the fst/and messenger
model
firstmessenger,
~
second messenger response
(eg. Adrenaline)
Hormone has a complementary shape
Tr-hormone receptor site
to receptor. They bind ~>
a
Binding
cyclase
causes
be
to
the inactive
achue
adenyl
Zumbrane
Adenys cyclase (unaccel
AYCH cAMP
(secessenger)
3 carverts ATP ->
(AYCY)
which actuates ene
, ENGINEGLAND
-
The structure and function ofadvenal glands
Advenal gland ->
on top of the
hidney
Steroid hormone
~
structure Aldosterone -> ↓ [H20] in urine
7
↳water reabsorption
->
CAPSULE ↳ Control blood pressure
of
-
>zona
glomerulosa
secretesmineralocorticolds
->
controls levels of int], [Nat]
cortex zona fisciculata
>secretes
glucocort colds
↓
I
-
eg. Cortisol
medulla
functions -gluconeogenesis
2
zona reticularis glycogenolysis ↓
↓ ↓ conversion of AA
releases breaking ofglycogen and fats to
pre-cursor glucose
molecules for sex hormones
(Androgens)
Medulla
2
Adrenalme narachenaie
↑ Heart
rate
Stimulates glycogenolysis
flight or fight response
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