NERVOUS SYSTEM

The cerebral cortex is divided into ...

4 lobes

Which of the following is a graded, non-propagated, hyperpolarization of a neuron plasma membrane?

IPSP

How many layers does the nerve have? Name them

It has 3 endoneurium, perineurium, epineurium

How many brain and spinal protectors do we have?

Meninges is divided into 3 1) dura mater 2) pia mater 3) arachnoid mater

Whats found in all 4 ventricles?

choroid plexuses

What are Brodman's areas?

classification of the cerebral cortex which is divided into 52 separate regions. This map of regions was based on its cytoarchitecture at a microscopic level

Basal nuclei

cognitive processing, associated with planning movements

The most probable site on a neuron where incoming information is received is the ___________.

dendrite

A change in membrane potential from -70 mV to -40 mV would be termed __________.

depolarization

Primary vesicles help establish basic regions of the nervous system which are: forebrain, midbrain, and hindbrain. However they are not -----

equivalent regions -midbrain is smaller than hindbrain and forebrain

In a neuron, a membrane potential of -90 mV is considered __________.

hyperpolarized

Which type of ion channel opens when a chemical binds to it?

ligand gated channel

Synaptic transmission is made possible by ____________.

neurotransmitters

Limbic cortex

part of the limbic system, involved in emotion, behavior and memory

Blood vessels that are nourishing the CNS are between ----- and -----

pia mater / nervous tissue

Neurotransmitters are removed from the synaptic cleft by all of the following except: ___________.

presynaptic inhibition

You would expect a neuron that depolarizes to -65 mV would __________.

return to resting membrane potential without generating an action potential

Coordination of reflexes depends on ..

sensory and motor pathways in the spinal cord

What increases the surface area available for cerebral functions?

the extensive folding of the cortex

The diencephalon is composed primarily of ....

the thalamus and hypothalamus which both of them define the walls of the third ventricle

True or False In the adult brain, the cerebellum seems close to the brain but theres no connection between them

true

Information is coded in the nervous system by:

varying the frequency of the APs

Which of the following is characteristic of an action potential?

vltage gated ion channels

Which of the following membrane ion channels open and close in response to changes in the membrane potential?

voltaged gated channels

Adult CNS structure is related to the embryonic development because of

- ventricles, which are open spaces within the CNS where cerebrospinal fluid circulates.

Neural activity in the brain causes...

A person's conscious activities

Which of the following is NOT a characteristic of neurons?

Neurons are relatively small, simple-structured cells

Whats the only region of the adult brain that kept its original name from the embryonic development?

diencephalon

Basal forebrain

important for learning and memory

The time interval during which no stimulus can elicit an action potential in a nerve fiber is called ______________.

absolute refractory period

The principal cause of early repolarization of a nerve fiber after an adequate stimulus has been applied is

an increase in the outward conductance of K+

where the CSF is reabsorbed into the blood?

at the arachnoid granulations

Early formation of the nervous system depends on what?

The formation of the neural tube