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OCR A-Level Biology Coordination Summary

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Handwritten Notes from an Oxford Medical Student detailing all the necessary A* content for Coordination in OCR A-Level Biology

Institution
OCR
Module
Unit 5








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Uploaded on
October 10, 2023
Number of pages
1
Written in
2023/2024
Type
Summary

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Gross Structure :

Cerebrum Controls
voluntary actions such as
learning
· :


,



and conscious thought
memory ,


personality
Cerebellum Controls functions
·


unconscious such as posture
:




Medrila Autonomic control
Oblongata ie
breathing
·
:




·Hypothalamus :




Regulatory centre ie .

temperature and water balance


Pituitary gland stores and releases hormones
·
:




Reflex Arc :
1 .


Receptor detects stimulus
2 .


Sensory neurone carries
impulse to the Spinal Cord
3 .



Relay neurone connects the
sensory
to the motor neurone

4 Motor neurone carries effector
.

impulse to the

↳ present actions and
at birth , support everyday assist survival


Knee-Jerk Reflex A extend when the patellar tendon
neural circuit that causes the
leg to
:




is tapped .
An abscence
may
indicate nevous problems
multiple extensions
may indicate cerebellar disease

Blinking Reflex A Cranial reflex (brain not the spinal cord)
:
.
,




stimulated both
When the cornea is
eyes should blink
↳ If the corneal reflex is present a patient cannot be brain dead

Fight or
flight Response :




Threat detected
is the
by autonomic nervous
:.
system
2.
and adrenal
Hypothalamus communicates with the
sympathetic cortical
Systems
3 Activates and adrenal medulla
Sympathetic system glands smooth muscles
:


nevous
.


,


nor advenaline and adrenaline released

system Activated by spituitary gland
·
Adrenal Cortical - :
CRE Secretes ACTH
↳ ACTH arrives adrenal cortex and hormone release
at
prompts
Cardiovascular medulla
Controlling Heart Rate centre in the
oblongata
:




Accelerator nerve: Releases neurotransmitter at the SAN to increase heart rate

·



vagus neve
:

Releases neurotransmitter at the SAN To decrease heat rate
↳ Heat to hormones like adrenaline
can also respond
↳ stimulated
by pH stress blood muscular contraction
changes
:


, ,
pressure ,
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Handwritten A-Level notes by an Oxford University Medical Student that specifically target the content needed for an A-A*.

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