Biopsychology - Divisions of the Nervous System

Paper 2 Biopsychology - divisions of the nervous system

What are the 2 sections of the Nervous System

Central Nervous System (CNS)

Peripheral Nervous System (PNS)

What is the Central Nervous System

consists of the brain and spinal cord, which process information and coordinate activities throughout the body.

What is the spinal cord

a tube shaped bundle of nerves along the spine

ensures signals from brain transmit to the body

what does the brain do

regulates all major activity of body including temperature, heart rate and breathing

What is the peripheral nervous system

Network of nerves through the body that transmits information from the body to the central nervous system and vice versa

Draw the diagram of the subdivisions of the Peripheral Nervous system

What does the Somatic Nervous System do

controls voluntary and conscious and voluntary muscle movement and transmits sensory information to the central nervous system

Draw a flow chart of the reflex arc

stimulus —> receptor cell —> sensory neruon —> relay neuron —> motor neuron —> effector muscle —> response to stumulus

What is the Autonomic Nervous System

Involuntary fast response to threats. Transmits and receives info from organs to respond quickly to changes and maintain homeostasis in the body

What are the two sub divisions of the autonomic nervous system

Sympathetic Nervous System

Parasympathetic Nervous System

What does the Sympathetic Nervous System do?

Works with the endocrine system to prepare the body for physical activity.

Works with the endocrine system to release adrenaline to fuel physiological changes in the body

What physiological changes occur during fight or flight

Increased heart rate

Pupil dialation

Sweating

Decreased digestion

widened bronchial passages

What is the Parasympathetic Nervous System?

Brings the body back to a normal state

regulates digestion and urination

What phisiological changes occur during rest and digest (PNS)

Slows heart rate and breathing

lowers blood pressure

digestion restarts