Nervous System Flashcards
What are the two subsystem of the nervous system?
Peripheral nervous system (PNS)
Central nervous system (CNS)
This system gathers information from the environment and sends it to the CNS
PNS
This system processes information and sends signals to the body through the PNS
CNS
Specialized cell that receives and transmits information rapidly
Neuron
Part of the neuron that receives info from other cells
Dendrites
Part of the neuron that transmits info to other cells
Axon
The fatty insulation around axons that makes the signal go faster
Myelin
The CNS consists of what structures?
Brain
Spinal cord
Love responsible for motor control, smell, speech, concentration, planning and problem solving
Frontal lobe
Love responsible for touch and pressure, taste, and body awareness
Parietal lobe
Lobe responsible for vision
Occipital lobe
Lobe responsible for hearing and facial recognition
Temporal lobe
Neurons that carry info to interneurons in CNS
Sensory neurons
Neurons that carry info from interneurons to muscles
Motor neurons
Neurons that are part of the CNS that processes sensory input and sends output to motor neurons and/or brain
Interneurons
Nervous systems responses may be voluntary or involuntary
True
False
True
Voluntary control is also known as
Somatic
Involuntary control is also known as
Autonomic
The fight or flight response
Sympathetic
The rest and digest response
Parasympathetic
Some reflexes can bypass the brain
True
False
True
This creates a rapid response in the body and bypasses the brain
Reflex arc
The gap between the axon of one neuron and the dendrite of another is called
Synapse
Neurotransmitter that controls muscle contractions
Acetylcholine
Neurotransmitter that increases heart rate, elevated blood pressure, as a part of the fight or flight response
Epinephrine
Neurotransmitter that stimulates fight or flight response; increases alertness
Norepinephrine
Neurotransmitter that stimulates neurons in the pleasure center of the brain; affects muscle activity
Dopamine
Neurotransmitter that assists muscle coordination by suppressing the activity of certain neurons
GABA
Neurotransmitter that regulates temperature, sleep and mood
Serotonin
Neurotransmitter that helps regulate day-night cycles including sleep
Melatonin
Neurotransmitter that inhibit transmission of signals from pain sensors, pain receptors
Enkephalins and endorphins
Neurotransmitter that regulates transmission of signals from pain receptors
Substance P
Main regions is the brain:
Forebrain
Midbrain
Hindbrain
The forebrain consists of:
Cerebrum
Thalamus
Hypothalamus
The midbrain and hindbrain together make up the
Brain stem
What are the 5 types of sensory receptors?
Chemoreceptors Photoreceptors Mechanoreceptors Thermoreceptors Pain receptors
How your body knows where it is in time and space is called
Proprioception
Part of the eye that controls the amount of light entering
Iris
The opening in the iris
Pupil
The part of the eye that focuses light
Lens
The sheet of photoreceptors at the back of the eye that converts light stimuli into nerve impulses
Retina
The part of the neuron that relays info to another neuron is the
Dendrite
Cell body
Axon
Myelin
Axon
The part of the brain involved in complex thought is the
Thalamus
Midbrain
Hypothalamus
Cortex
Cortex
What is the proper sequence of a reflex arc?
Sensory -> interneurons-> motor
Which of the following is not a specific type of receptor?
Chemoreceptor
Auditory receptor
Mechanoreceptor
Photoreceptor
Auditory receptor
Proprioceptors are receptors that sense
Sound
Light
Chemicals
Body position
Body positions
The CNS includes the brain and spinal cord
True
False
True
Reflex arcs are not processed in the brain
True
False
True
In which direction does info travel in a neuron
From axon in to dendrite out
From dendrite in to axon out
Can travel in either direction
Two of the answers are correct
From dendrite in to axon our
Which part of the brain is responsible for higher thought functions?
Cerebrum
Midbrain
Hindbrain
All are correct
Cerebrum
Which two senses have chemoreceptors?
Sight and touch
Taste and touch
Smell and taste
Sight and smell
Smell and taste
Which are responsible for our color vision?
Cones
Rods
Cones
Which are responsible for our black and white vision?
Cones
Rods
Rods
Tickling is a form of pain
True
False
True