A& P Chap 7 Nervous System Flashcards
Besides the accessory nerve(XI), which pair of cranial nerves extends beyond the head and neck?
Vagus (X)
The ____________ area that allows us to consiously move our skeletal muscles is anterior to the central sulcus in the ________ lobe.
Primary motor, frontal lobe
The cell bodies of sensory neurons whose fibers enter the cord are found in the __________.
Dorsal root ganglion
the cells that produce myelin in the PNS are called __________, and in the CNS the cells are called _____________
Schwann cells, oligodendrocytes
the CNS consists of ______________.
The brain and the spinal cord
The 3 connective tissue membranes covering and protecting CNS structures are collectively known as the _________. The _____________ is the outermost, leathery layer.
Meninges, dura mater
Ehat is the minimum # of neurons that can be involved in a reflex?
2
The deep grove that separates the 2 hemispheres of the cerebrum is called the __________.
longitudinal fissure
Which of the following substances is NOT prevented from entering the brain tissue due to tight junctions that form the blood brain barrier?
Essential amino acids
which of the following is not a CNS system glial cells?
neuron
An action potential occurs when ________________]_
1) occurs when the local potential reaches threshold, 2) obeys the all or none rule, 3) proceeds with constant magnitude from one point to another, 4) is characterized by a series of depolarizations/repolarizations along the membrane.
(all of the above)
which one of the following statements are false regarding the brain stem?
The medulla oblongata, in addition to containing many nuclei that regulate vital visceral activities, plays a role in conscious and awake/sleep cycles.
between successive schwann cells, there are gaps in the myelin sheath called _________.
nodes of ranvier
damage of which cranial nerve(s) may impair the sense of taste?
the facial (N VII) and the glossopharyngeal (N IX)
the ________ produces cerebrospinal fluid.
choroid plexuses
the cerebellum aids in maintenance of _________.
balance and posture.
the corpus callosum connects the ___________.
right and left cerebral hemispheres.
the dendrite of a neuron ____________.
conducts nerve impulses toward the neuron cell body.
which of the following cranial nerves supplies motor fibers to the pharynx that promots swollowing and saliva production, and carries sensory impulses from taste buds of the posterior tongue and from pressure receptors of the carotid artery?
Glossopaharyngeal nerve (IX)
which of the following statements regarding the nerve impulse is true?
A stimulus changes the permeability of a “patch” of the membrane, and sodium ions (na) diffuse rapidly into the cell.
the nervous system gathers and interprets info, then effects a response through a process called __________
motor output
the ________ nervous system includes the brain and spinal cord.
central
__________ neurons carry an impulse to the CNS.
Afferent
Collectively, the supporting cells in the cns are called _____________
Neuroglia
Supporting cells in the PNS include _________ that form myelin sheaths and satellite cells that act ad a protective cushioning cells.
Schwann cells
all motor and association neurons are ___________
multipolar
__________ reflexes regulate skeletal muscle.
somatic
which of the following is vital to the ability to speak?
broca’s area
The _________ division of the automatic nervous system allows us to initiate the flight or fight response in extreme circumstances.
sympathetic
together with the brain stem, the ______ overseas all subconscious, automatic functions.
diencephalon
