PNS- Functions
What are some involuntary processes our body regulates?
Heart rate, Blood pressure, Respiration, and Digestion
What are the three main functions of the central nervous system?
Receive sensory information.
Process the information it receives (integration).
Respond with motor output.
What are the main components of the Central Nervous System?
Brain and spinal cord
What is sensory integration?
Process in the brain that allows us to receive the 5 senses.
What are the 3 main functions of the PNS
regulates involuntary processes
sends sensory information from body to brain
carries motor commands from brain to body
How does the central nervous system work?
Your brain regulates your thoughts, feelings and movements. It manages the things you do, like bending your fingers, learning and communicating.
What are the main components of the Peripheral Nervous System?
Ganglia and nerves
Where does motor control send signals to?
To the muscle and glands
True or False: The Peripheral Nervous System (PNS) only sends sensory information from the body to the brain.
False – The PNS sends sensory information to the brain and carries motor commands from the brain to the body.
How is the CNS protected from injury and infection?
The central nervous system is protected from injury by the skull and vertebral column, which are rigid bony structures.
How many pairs of nerves are there in PNS?
43 pairs
What is homeostasis regulation?
CNS helps the body regulate internal balances
What roles do the autonomic and somatic nervous systems play in our everyday activities?
The autonomic nervous system controls involuntary processes like heart rate, breathing, and digestion, which happen automatically without us needing to think about them. The somatic nervous system handles voluntary movements, like walking or lifting, and even some reflexes, helping us interact physically with the world.
How does the CNS process pain signals?
Pain signals are initially detected by nociceptors, then transmitted through the spinal cord and to the brain, where they are interpreted and processed.
Where are sensory ganglia located?
On the dorsal roots of spinal nerves
Name four ways the body regulates internal balances?
Temperature, thirst, hunger, and circadian rhythm.
What is an example of a reflex within the Somatic Nervous System?
Knee-Jerk Reflex (Patellar Reflex), Withdrawal Reflex (Flexor Reflex)
What are the different levels of motor control within the CNS (e.g., spinal reflexes, brainstem circuits, cortical control)?
The central nervous system (CNS) organizes motor control across three main levels: spinal reflexes (segmental), brainstem circuits (projection), and cortical control (precommand).
Which ganglia is involuntary?
Autonomic ganglia
What are cognitive functions and give one example?
When the brain handles complex tasks such as thinking, decision making, and etc.