Chapters 11-14 Flashcards
What is the ANS system? What does it do?
- part of the peripheral nervous system
- it functions involuntarily and reflexively.
What are the Ciliated cells that circulate the CSF?
Ependymal Cells
How does the CNS determine the strength of a stimulus?
CNS determines stimulus intensity by the frequency of impulses, Higher frequency means stronger stimulus. Strong stimuli cause action potentials to occur more frequently of impulses per second or frequency of Action Potentials.
What neurotransmitter is secreted to stimulate skeletal muscles?
ACh excitatory at neuromuscular junctions in skeletal muscle
What is the absolute refractory period?
When voltage-gated Na+ channels open neuron cannot respond to another stimulus.
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What does acetylcholinesterase do?
Breaks down ACh
What is CNS composed of?
composed of the brain & spinal cord.
What saltatory conduction is and what makes it possible?
Saltatory conduction is a degree of myelination (possible only in myelinated axons) is about 30 times faster than Continuous conduction. It’s possible because Voltage-gated Na+ channels are located at myelin sheath gaps the APs generated only at gaps where Electrical signal appears to jump rapidly from gap to gap.
Where is the primary auditory cortex is located?
Superior margin of temporal lobes
Which fissure separates the cerebral hemispheres?
Longitudinal fissure
What is the Broca’s area?
A portion of the frontal lobe linked to speech production
What association is (in relation to memory formation)?
Linking two unrelated things together like name and face of someone you just met
What nerve is the funny bone?
The ulnar nerve travels through a tunnel of tissue (the cubital tunnel) that runs under a bump of bone at the inside of your elbow.
What are nociceptors for?
They are used to detect pain.
What are the two nerves that make up the sciatic nerve?
The Tibial and peroneal nerves
