CNS(Central Nervous System)
What is the Central Nervous System made up of?
Brain and spinal cord.
What does the PNS consist of?
All the nerves branching from the brain and spinal cord to the rest of the body
What are specialized cells that carry messages in the nervous system?
neurons
What is sensory input?
Collecting information from the enviornment with sensory receptors.
What is the main job of the nervous system?
To control and coordinate everything the body does (thinking, feeling, moving, reacting)
What is the main function of the brain?
To process sensory info, thoughts, emotions, and control body functions like movement
Which divisions of the PNS controls voluntary movements?
The somatic nervous System
What kind of signals do neurons use to communicate?
Electrical and chemical signals
What does integration mean in the nervous system?
The brain processes and interprets sensory information to decide how to respond.
How does the nervous system keep the body in balance (homeostasis)?
By controlling voluntary actions and involuntary functions.
What does the spinal cord act as between the brain and body?
A highway for information travelling between the brain and body.
Which division of the PNS regulates involuntary functions?
the autonomic nervous system
What is the gap between the two neurons called?
synapse
What is motor output?
Name one voluntary actions and one involuntary action the nervous system controls.
Voluntary= moving muscles
involuntary= breathing or digestion
Which part of the CNS coordinates reflexes?
The spinal cord.
Whats an example of an involuntary system controlled by the autonomic system?
Heart rate, digestion, breathing, sweating
What chemical Messengers carry signals across a synapse?
Nuerotransmitters
Example: if you touch something hot, what is the sensory input?
sensory nerves in the skin send a signal of heat to the brain.
Why is the nervous system called the "control and communication system"?
Because it keep all parts of the body working together by sending, receiving, and processing signals.
What would be the process between the brain and spinal cord when touching something hot?
Sensory nerves send a signal to the brain/spinal cord->the brain processes the info-> brain sends a signal back through the spinal cord-> hand pulls away
Whats the difference between somatic and autonomic in terms of control?
Somatic=voluntary (moving muscles)
autonomic= involuntary (heart rate, digestion, breathing)
How do neurons use electrical and chemical signals together to send messages?
Electrical signals travel along the neuron -> at the synapse neurotransmitters are realesed -> they carry the signal across to the next neuron or muscle
In the process of reacting to something hot, which step of the nervous system decides that you should move your hand away?
Integration - the brain processes the sensory input and decides on the response
What would happen if the nervous system stopped working?
We couldn't move, feel, think, or function. Life wouldn't be possible.