anatomy final Flashcards
Which of the following cavities contains a component of the central nervous system?
a. abdominal
b. pelvic
c. cranial
d. thoracic
c. cranial
Which structure predominates in the white matter of the brain?
a. myelinated axons
b. neuronal cell bodies
c. ganglia of the parasympathetic nerves
d. bundles of dendrites from the enteric nervous system
a. myelinated axons
Which part of a neuron transmits an electrical signal to a target cell?
a. dendrites
b. soma
c. cell body
d. axon
d. axon
Which term describes a bundle of axons in the peripheral nervous system?
a. nucleus
b. ganglion
c. tract
d. nerve
d. nerve
Which functional division of the nervous system would be responsible for the physiological changes seen during exercise (e.g., increased heart rate and sweating)?
a. somatic
b. autonomic
c. enteric
d. central
b. autonomic
What type of glial cell provides myelin for the axons in a tract?
a. oligodendrocyte
b. astrocyte
c. Schwann cell
d. satellite cell
a. oligodendrocyte
Which part of a neuron contains the nucleus?
a. dendrite
b. soma
c. axon
d. synaptic end bulb
b. soma
Which of the following substances is least able to cross the blood-brain barrier?
a. water
b. sodium ions
c. glucose
d. white blood cells
d. white blood cells
What type of glial cell is the resident macrophage behind the blood-brain barrier?
a. microglia
b. astrocyte
c. Schwann cell
d. satellite cell
a. microglia
What two types of macromolecules are the main components of myelin?
a. carbohydrates and lipids
b. proteins and nucleic acids
c. lipids and proteins
d. carbohydrates and nucleic acids
c. lipids and proteins
If a thermoreceptor is sensitive to temperature sensations, what would a chemoreceptor be sensitive to?
a. light
b. sound
c. molecules
d. vibration
c. molecules
Which of these locations is where the greatest level of integration is taking place in the example of testing the temperature of the shower?
a. skeletal muscle
b. spinal cord
c. thalamus
d. cerebral cortex
d. cerebral cortex
How long does all the signaling through the sensory pathway, within the central nervous system, and through the motor command pathway take?
a. 1 to 2 minutes
b. 1 to 2 seconds
c. fraction of a second
d. varies with graded potential
c. fraction of a second
What is the target of an upper motor neuron?
a. cerebral cortex
b. lower motor neuron
c. skeletal muscle
d. thalamus
b. lower motor neuron
What ion enters a neuron causing depolarization of the cell membrane?
a. sodium
b. chloride
c. potassium
d. phosphate
a. sodium
Voltage-gated Na+ channels open upon reaching what state?
a. resting potential
b. threshold
c. repolarization
d. overshoot
b. threshold
What does a ligand-gated channel require in order to open?
a. increase in concentration of Na+ ions
b. binding of a neurotransmitter
c. increase in concentration of K+ ions
d. depolarization of the membrane
b. binding of a neurotransmitter
What does a mechanically gated channel respond to?
a. physical stimulus
b. chemical stimulus
c. increase in resistance
d. decrease in resistance
a. physical stimulus
Which of the following is probably going to propagate an action potential fastest?
a. a thin, unmyelinated axon
b. a thin, myelinated axon
c. a thick, unmyelinated axon
d. a thick, myelinated axon
d. a thick, myelinated axon
Which of the following voltages would most likely be measured during the relative refractory period?
a. +30 mV
b. 0 mV
c. -45 mV
d. -80 mv
d. -80 mv
How much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated?
a. +30 mV
b. +15 mV
c. +10 mV
d. -15 mV
b. +15 mv
A channel opens on a postsynaptic membrane that causes a negative ion to enter the cell. What type of graded potential is this?
a. depolarizing
b. repolarizing
c. hyperpolarizing
d. non-polarizing
c. hyperpolarizing
What neurotransmitter is released at the neuromuscular junction?
a. norepinephrine
b. serotonin
c. dopamine
d. acetylcholine
d. acetylcholine
What type of receptor requires an effector protein to initiate a signal?
a. biogenic amine
b. ionotropic receptor
c. cholinergic system
d. metabotropic receptor
d. metabotropic receptor
Which of the following neurotransmitters is associated with inhibition exclusively?
a. GABA
b. acetylcholine
c. glutamate
d. norepinephrine
a. GABA
Aside from the nervous system, which other organ system develops out of the ectoderm?
a. digestive
b. respiratory
c. integumentary
d. urinary
c. integumentary
Which primary vesicle of the embryonic nervous system does not differentiate into more vesicles at the secondary stage?
a. prosencephalon
b. mesencephalon
c. diencephalon
d. rhombencephalon
b. mesencephalon
Which adult structure(s) arises from the diencephalon?
a. thalamus, hypothalamus, retina
b. midbrain, pons, medulla
c. pons and cerebellum
d. cerebrum
a. thalamus, hypothalamus, retina
Which non-nervous tissue develops from the neuroectoderm?
a. respiratory mucosa
b. vertebral bone
c. digestive lining
d. craniofacial bone
d. craniofacial bone
Which structure is associated with the embryologic development of the peripheral nervous system?
a. neural crest
b. neuraxis
c. rhombencephalon
d. neural tube
a. neural crest
Which lobe of the cerebral cortex is responsible for generating motor commands?
a. temporal
b. parietal
c. occipital
d. frontal
d. frontal
What region of the diencephalon coordinates homeostasis?
a. thalamus
b. epithalamus
c. hypothalamus
d. subthalamus
c. hypothalamus
What level of the brain stem is the major input to the cerebellum?
a. midbrain
b. pons
c. medulla
d. spinal cord
b. pons
What region of the spinal cord contains motor neurons that direct the movement of skeletal muscles?
a. anterior horn
b. posterior horn
c. lateral horn
d. alar plate
a. anterior horn
Brodmann’s areas map different regions of the ________ to particular functions.
a. cerebellum
b. cerebral cortex
c. basal forebrain
d. corpus callosum
b. cerebral cortex
What blood vessel enters the cranium to supply the brain with fresh, oxygenated blood?
a. common carotid artery
b. jugular vein
c. internal carotid artery
d. aorta
c. internal carotid artery
Which layer of the meninges surrounds and supports the sinuses that form the route through which blood drains from the CNS?
a. dura mater
b. arachnoid mater
c. subarachnoid
d. pia mater
a. dura mater
What type of glial cell is responsible for filtering blood to produce CSF at the choroid plexus?
a. ependymal cell
b. astrocyte
c. oligodendrocyte
d. Schwann cell
a. ependymal cell
Which portion of the ventricular system is found within the diencephalon?
a. lateral ventricles
b. third ventricle
c. cerebral aqueduct
d. fourth ventricle
b. third ventricle
What condition causes a stroke?
a. inflammation of meninges
b. lumbar puncture
c. infection of cerebral spinal fluid
d. disruption of blood to the brain
d. disruption of blood to the brain
What type of ganglion contains neurons that control homeostatic mechanisms of the body?
a. sensory ganglion
b. dorsal root ganglion
c. autonomic ganglion
d. cranial nerve ganglion
c. autonomic ganglion
Which ganglion is responsible for cutaneous sensations of the face?
a. otic ganglion
b. vestibular ganglion
c. geniculate ganglion
d. trigeminal ganglion
d. trigeminal ganglion
What is the name for a bundle of axons within a nerve?
a. fascicle
b. tract
c. nerve root
d. epineurium
a. fascicle
Which cranial nerve does not control functions in the head and neck?
a. olfactory
b. trochlear
c. glossopharyngeal
d. vagus
d. vagus