General Senses Flashcards
What sensory pathway does not synapse in the thalamus (does not get redirected from thalamus)
Smell, it is directed straight through to the olfactory cortex
Which of the following would be an adequate stimulus for a mechanoreceptor? A.oxygen B.cell stretch C.photon of light D.cold temperature E.pH
Cell stretch
What sensory neuron detects oxygen levels
Chemoreceptors
What sensory neurons detects photons of light
photoceptors
What sensory neurons detect cold temperature
Thermoreceptors
A graded change in membrane potential within a sensory receptor cell is always called a(n) A.depolarization B.hyperpolarization C.action potential D.receptor potential E.gate potential
D
MOST sensory pathways first travel to the ________,
which acts as a relay and processing station.
A.cerebrum
B.thalamus
C.cerebellum
D.hypothalamus
E.medulla oblongata
B Thalamus is responsible for being the gate keeper of sensory neuron activity (minus smell which is through the olfactory cortex)
What sense is related to the olfactory cortex
smell
What does the cerebrum do
Thought, sensory, movement ect
What does the thalamus do
Acts as a gate keeper for most sensory neurons to be partitioned into their specialized regions
What does the cerebellum do
Motor movements, balance, posture, and speech
what does the hypothalamus do
Learning and memory and hormonal homeostasis controls, including food, temperature, energy levels
What does the Medulla Oblongata do?
Blood pressure and respiratory systems
The intensity of a stimulus can be determined within the
central nervous system by?
A.population coding only
B.labelled line coding only
C.frequency coding only
D.population coding and/or frequency coding
E.labelled line coding and/or frequency coding
D population and frequency coding
Population coding: Uses lateral inhibition to make the strongest stimulated neuron be percieved more easily (stronger intensity) by the brain
Frequency coding: From the intensity of a stimulus to encode that strength using higher or lower frequencies of propagation to make the brain perceive a stronger stimulus
What is labelled line coding
Perception of a signal from specific neurons that are always interpreted the same way despite the method of activating them being non standard
Eg Pressing on eyes to “see: stars, when you are actually just activating photosensors mechanically
