When impulses from various sources have an additive effect on a neuron, the process is called
Which component of a reflex arc is located entirely within the central nervous system (CNS)?
The organs of the central nervous system are the
|A)||brain and cranial nerves|
|B)||brain and meninges|
|C)||cranial and spinal nerves|
|D)||brain and spinal cord|
The outer membrane covering the brain is composed of dense connective tissue, and is called the
Cerebrospinal fluid is mainly found between the
|A)||arachnoid mater and the dura mater|
|B)||dura mater and the bones of the skull|
|C)||pia mater and arachnoid mater|
|D)||pia mater and the surface of the brain and spinal cord|
In the adult, the spinal cord ends
|A)||at the sacrum|
|B)||between thoracic vertebrae 11 and 12|
|C)||between lumbar vertebrae 1 and 2|
|D)||at lumbar vertebra 5|
If a person has no sensation in the legs, which of the following portions of the spinal cord may be injured or damaged?
|A)||ascending tracts of the spinal cord|
|B)||anterior horn in the lumbar enlargement|
|C)||posterior horn in the cervical enlargement|
|D)||descending tracts of the spinal cord|
What structure connects the left and right cerebral hemispheres?
Which of the following is involved in hearing a phone ring?
Which of the following is a function of the association areas in the frontal lobe?
|A)||recognizing your mother|
|B)||planning a party|
|C)||reading your textbook|
|D)||understanding your friend’s speech|
The pathologic movements of Parkinson and Huntington disease are due to damage in the
|B)||primary motor area|
Cerebrospinal fluid (CSF) is produced by the
The diencephalon contains all of the following structures except
The part of the brain stem that contains centers for cardiovascular control, sneezing and swallowing is the
The part of the brain responsible for regulation of sleep and wakefulness is the
The lobes of the cerebellum are connected by the
The cranial nerves that control movement of the eyes are
|A)||optic, oculomotor, and facial|
|B)||oculomotor, trochlear, and abducens|
|C)||optic, oculomotor, and abducens|
|D)||oculomotor, trigeminal, and abducens|
The cranial nerve responsible for equilibrium and hearing is the
Which of the following cranial nerves innervates structures below the neck?
The portion of the nervous system that is most active when the body is at rest is the
Release of neurotransmitter from the presynaptic neuron is dependent upon diffusion of calcium ions into the cell.
The sensory function of the nervous system is carried out by efferent fibers.
The dendrite arises from a hillock or elevation of the cell body and carries impulses away from the cell body.
Myelinated fibers form the white matter in the central nervous system.
A neuron may have many dendrites but only one axon.
Neurons that are deprived of oxygen can be irreversibly damaged.
Neurons are the most abundant cells in the nervous system.
Myelination begins in prenatal development and is complete by the time of birth.
Sodium ions pass more easily through the cell membrane than potassium ions.
The amount of change in the resting potential of a neuron’s cell membrane is proportional to the intensity of the stimulus, as long as the threshold is not reached.
The speed of nerve impulse conduction increases as the diameter of the nerve fiber increases.
The short time during an action potential when an axon is non-responsive to a threshold stimulus is called the all or none principle.