A&P Chapter 8 Nervous System Review
The part of the PNS that brings information to the CNS is the _________.
Afferent division
The _________ acts as a switching and relay center for integration of conscious and unconscious sensory information and motor commands.
Diencephalon
What do you call the specialized membranes that protect the spinal cord?
Spinal meninges
What does the all or none principle state?
The strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fiber will fire.
If the dorsal root of a spinal nerve is severed, what results?
There would be no senses brought to the spinal cord.
The ________ establishes emotional states.
Limbic system
The entire spinal cord is divided into __________ segments
31
There are ____ pairs of spinal nerves
31
___________ refers to the loss of memory from disease or trauma.
Amnesia
The _______________ nervous system provides involuntary regulation of smooth muscle, cardiac muscle, and glandular activity.
Autonomic
The part of the CNS that adjusts voluntary and involuntary motor activites on the basis of sensory information and stored memories of previous moments is the __________.
Cerebellum
The region of the brain that is involved in conscious thought and intellectual function as well as processing somatic sensory and motor information is the _______.
Cerebrum
Where do enlargements of the spinal cord occur?
In those spinal segments that control the limbs.
Stimulation of the reticular formation results in
Increased activity of the cerebral cortex, resulting in a more attentive and awake state
Another name for the patellar reflex is the
Knee jerk reflex
The two cerebral hemispheres are separated by the _________________.
Longitudinal fissure
If the Broca's area is damaged what might result?
Losing the ability to speak
Major centers concerned with autonomic function, such as heart rate, blood pressure, and respiration is the ________.
Medulla Oblongota
Which structure contains cardiovascular and respiratory rhythmicity centers?
Medulla Oblongota
Neurons that have 2 or more dendrites and a single axon extending away from the soma are called ______________.
Multipolar
The visual cortex is located in the __________.
Occipital lobe
The only cranial nerve that is attached to the cerebrum is the __________.
Olfactory nerve
Which part of the brain performs such abstract intellectual function as predicting the future consequences of events or actions?
Prefrontal cortex
What is the most sensitive body region?
The face
Damage to the ___________ nerve, which is vital for autonomic control of visceral function, could result in death
Vagus
In adults the spinal cord usually extends to which level?
Vertebral levels L1-L2.
Most neurons lack centrioles. This observation explains what?
Why they cannot divide through mitosis.
Pulling away from a painful stimulus is an example of the ________ reflex.
Withdrawal reflex
Neurons that have one axon and one dendrite, with the soma in between, are called
Bipolar
In general the nervous system is fast acting. It is divided into the CNS and PNS. What is each of these divisions comprised of?
CNS- Brain and spinal cord PNS- All of the neural tissue outside the CNS
The primary connection between cerebral hemispheres is the __________.
Corpus callosum
The branching structure that, together with the cell body, are sensitive to chemical, mechanical, or electrical stimulation are called ________.
Dendrites
The ____________ is the layer of meninges that is in direct contact with the surface of the brain.
Pia matter
Which structure secretes melatonin
Pineal gland
Which structure secretes antidiuretic hormone and oxytocin
Pituitary gland
Head injuries that damage cerebral blood vessels are serious conditions because
These spaces compress and distort the relatively soft tissues of the brain.
The cranial nerve that has 3 branches is the ______.
Trigeminal nerve