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Bio 223- exam three
Test Questions and answers to exam 3
28
Biology
05/14/2008

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Term

what is the space called that circulates the cerebrospinal fluid once it has left the ventricles?

Definition
the subarachnoid space
Term

what is the muscle that extends the arm while doing push-ups?

Definition
tricep
Term
What is the major abductor muscle in the arm?
Definition
deltoid
Term

which muscles are not a part of the hamstring group?

Definition
 quadriceps femoris and gracilis
Term

results of opening the sodium channels in the membrane of a neuron:

Definition
depolarization
Term

what do cholinergic synapses release?

Definition
Acetylcholine
Term
What happens when the sodium channels are blocked?
Definition

neuron is unable to generate action potentials

Term
bipolar neurons
Definition
have one dendrite and one axon
Term
all or nothing principal
Definition
all stimuli great enough to bring the membrane to threshold will produce identical action potentials
Term
Name the glial cells
Definition

-ependymal,

microglia,

oligodendrocytes,

astrocytes

Term
Which type of synapse dominates the nervous system?
Definition

chemical synapses

 

Term
which organs make up the central nervous system?
Definition

the brain and the spinal cord

 

Term
what are Horns?
Definition
projections of gray matter toward to outter surface of the spinal cord.
Term

Where are the enlargements of the spinal cord?

Definition
Enlargements of the spinal cord occur in segments of hte spinal cord that control the limbs
Term
Which is shorter the spinal cord itself, or the veterbral column
Definition

The spinal cord itself

Term
Dura Mater
Definition
tough, fibrous outermost covering of the spinal cord
Term
what type of nerves are spinal nerves?
Definition
mixed
Term
What do the dorsal root ganglion hold?
Definition
contain cell bodies of sensory neurons
Term

How many cervical bones are in...

Cervical:

Thoracic:

Lumbar:

Sacral:

Coccygeal:

Definition

Cervical-8

 

thoracic- 12

 

lumbar-5

 

sacral-5

 

coccygeal- 1

 

Term

what does the white matter of the spinal cord hold?

Definition

bundles of axons  that share common origins and destinations

Term
Function of the hippocampus
Definition
important in learning and storage of long term memories
Term
where are autonomic controls of the body are taken care of?
Definition

Medulla Oblongata

Term

Function of the Cerebellum

Definition
Oversee postural muscles of the body and makes rapid adjustments to maintain balance
Term
How are the thrid and fourth ventricle linked?
Definition
the cerebral aquaduct
Term

Association regions are....

Definition
regions of the brain that are involved in interpreting data or coordinating motor responses
Term
what is the falx cerebri?
Definition
fold of the dura mater that projects between the cerebral hemisphere in the midsaggital plane
Term
Which system provides voluntary control over skeletal muscles?
Definition
Pyramidal
Term

what does the 1st order neuron do?

Definition
delivers sensation to the cns