Nervous System Fight/ Flight
-specialised network of cells -body’s response to stress
-first/ immediate shock involves the sympathetic brach of the ANS
-primary internal communication system
-second/ countershock response involves the parasympathetic branch of the ANS
-collects, processes and responds to information in the environment and coordinates
the working of different cells and organs
Immediate Shock
Nervous System fight/ flight response (endocrine & ANS working together
Hypothalamus Activates Symathetic
Central Nervous System Peripheral Nervous System Adrenal Medulla Releases Adrenaline
branch of ANS
Brain Spinal Cord Somatic NS Autonomic NS Countershock
once threat has passed, parasympathetic branch reduces activity of the sympathetic bran
body (slows heart rate, reduces blood pressure)
Sympathetic Parasympathetic
Physiological Change Reason
CNS- controls behaviour & regulates physiological processes (brain & spinal -Increased heart rate increased blood flow to organs & movement of adrenali
cord) -dilated bronchi increases breathing rate to increase oxygen intake
Brain- provides conscious awareness -reduction of non essential increased energy towards essential functions
functions (digestion)
Spinal Cord- transfer messages to & from the brain and rest of the body
PNS- (everything else in the body) transmits info from CNS to the rest of the
body, and back again
Somatic NS- voluntary movements, consciously aware, contains both sensory
(to CNS) & motor neurons (from CNS)
Autonomic NS- involuntary movements, happen automatically (breathing,
Biopsychology- Systems SS1
digestion)
Sympathetic- activates internal organs, fight/ flight response (increase heart
rate, constrict blood vessels) Structure
Parasympathetic- conserves energy, relaxes body after fight/ flight Neurons cell body- contains genetic material
-specialised nerve cells in nervous system dendrites- receive signals from other neur
-pass on neural information throughout body body
-enable communication wihin nervous system axon- carry messages away from the cell b
axon terminals- contain neurotransmitter
Endocrine System
-slower than nervous system
-network of glands that secrete chemical messages called hormones Motor Neuron Relay Neuron
CNS -> Effector CNS -> CNS
-hormones are secreted into the bloodstream
-affects bodily functions and metabolism Short Dendrites
-regulates cell/ organ activity Short Dendrites
Cell Body
Master Gland
-specialised network of cells -body’s response to stress
-first/ immediate shock involves the sympathetic brach of the ANS
-primary internal communication system
-second/ countershock response involves the parasympathetic branch of the ANS
-collects, processes and responds to information in the environment and coordinates
the working of different cells and organs
Immediate Shock
Nervous System fight/ flight response (endocrine & ANS working together
Hypothalamus Activates Symathetic
Central Nervous System Peripheral Nervous System Adrenal Medulla Releases Adrenaline
branch of ANS
Brain Spinal Cord Somatic NS Autonomic NS Countershock
once threat has passed, parasympathetic branch reduces activity of the sympathetic bran
body (slows heart rate, reduces blood pressure)
Sympathetic Parasympathetic
Physiological Change Reason
CNS- controls behaviour & regulates physiological processes (brain & spinal -Increased heart rate increased blood flow to organs & movement of adrenali
cord) -dilated bronchi increases breathing rate to increase oxygen intake
Brain- provides conscious awareness -reduction of non essential increased energy towards essential functions
functions (digestion)
Spinal Cord- transfer messages to & from the brain and rest of the body
PNS- (everything else in the body) transmits info from CNS to the rest of the
body, and back again
Somatic NS- voluntary movements, consciously aware, contains both sensory
(to CNS) & motor neurons (from CNS)
Autonomic NS- involuntary movements, happen automatically (breathing,
Biopsychology- Systems SS1
digestion)
Sympathetic- activates internal organs, fight/ flight response (increase heart
rate, constrict blood vessels) Structure
Parasympathetic- conserves energy, relaxes body after fight/ flight Neurons cell body- contains genetic material
-specialised nerve cells in nervous system dendrites- receive signals from other neur
-pass on neural information throughout body body
-enable communication wihin nervous system axon- carry messages away from the cell b
axon terminals- contain neurotransmitter
Endocrine System
-slower than nervous system
-network of glands that secrete chemical messages called hormones Motor Neuron Relay Neuron
CNS -> Effector CNS -> CNS
-hormones are secreted into the bloodstream
-affects bodily functions and metabolism Short Dendrites
-regulates cell/ organ activity Short Dendrites
Cell Body
Master Gland
