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Final
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38
Anatomy
12/08/2011

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Term
voltage regulated Na+ gates open
Definition
When a neuron is depolarized to theshold
Term
the diffusion of K+
Definition
The falling phase of an action potential results from
Term
large myelinated fibers
Definition
Nerve signals travel fastest in
Term
the threshold potential
Definition
A neuron fires only when its membrane reaches
Term
Na+ is entering the neuron
Definition
During the rising phase of an action potential
Term
one axon and one dendrite arising from the soma
Definition
A bipolar neuron has
Term
the myelin sheath and neurilemma
Definition
The regeneration tube of a peripheral nerve fiber consists of
Term
undergo mitosis
Definition
Mature neurons lack centrioles. You would expect these neurons to be unable to
Term
ependymal cells
Definition
Glial cells which resemble a cuboidal epithelium without the basement membrane and produce cerebrospinal fluid (CSF) are called
Term
glial cells; blood-brain barrier
Definition
Most adult brain tumors are composed of _______ cells and cannot be treated by chemotherapy because of the ________
Term
Na+ gates open; K+ gates open; Na+ gates close
Definition
The correct sequence of voltage-regulated gates opening and closing in an action potential
Term
pia mater; filum terminale
Definition
The innermost meninx around the spinal cord is called the _____ and extends beyond the medullary cone as the ________
Term
arbor vitae
Definition
The white matter of the cerebellum constitutes its
Term
thalamus
Definition
Almost all sensory signals pass through the _____ on the way to the cerebrum.
Term
medulla oblongata
Definition
The _______ contains nuclei that control coughing, sneezing, swallowing and vomiting.
Term
the limbic system
Definition
The brain center most concerned with emotion is
Term
filiform
Definition
Taste buds are found on all the lingual papillae except for the ____ type
Term
malleus
Definition
The _____ is attached to the medial side of the tympanic membrane.
Term
ectoderm; neural plate
Definition
The neurons and all glial cells except microglia are derived from embryonic tissue called ___ that thicken to form a structure called the _____ in the 3rd week of embryonic development
Term
central canal and ventricles
Definition
The lumen of the neural tube develops into the
Term
dura mater; dural sinuses
Definition
The outer double meningeal layer around the brain is called the _____ and in some places the two layers are separated by ______
Term
meningitis
Definition
An individual is experiencing a high fever, stiff neck, drowsiness and intense headaches. A spinal tap showed bacteria and white blood cells in the cerebrospinal fluid. This individual most likely has
Term
choroid plexus; ependymal cells
Definition
A network of capillaries in the brain that produces cerebrospinal fluid is called the _____ and is surrounded by glial cells called ____
Term
metencephalon
Definition
The cerebellum develops from the embryonic
Term
glucose, water, oxygen, alcohol and caffeine
Definition
The blood-brain barrier is most permeable to this group of chemicals
Term
multiple sclerosis
Definition
In this disorder, oligodendrocytes and myeline sheaths of the CNS deteriorate and are replaced by hardened scar tissue
Term
the cerebellum
Definition
Most concerned with motor coordination and equilibrium
Term
the occipital lobe
Definition
Lobe of the cerebrum most concerned with vision
Term
the arachnoid villi and dural sinuses
Definition
Cerebrospinal fluid returns to the bloodstream by way of
Term
digestive system
Definition
Not under the control of the ANS
Term
glycerol
Definition
Triglycerides consist of 3 fatty acids combined with a
Term
negative feedback
Definition
Homeostasis is maintained primarily by
Term
the hypothalamus
Definition
Sex drive, body temperature and food and water intake are regulated by
Term
dura mater, arachnoid mater, pia mater
Definition
From superficial to deep, the meninges occur:
Term
somatic motor division
Definition
Carries signals to the skin and skeletal muscles
Term
astrocytes
Definition
The most abundant glial cells in the CNS and constitute over 90% of the tissue in some areas of the brain
Term
-70 mV
Definition
Resting membrane potential (mV)
Term
-55 mV
Definition
Theshold (mV)