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Chapter 7: The Nervous System
This activity contains 20 questions.
A neuron cannot conduct another impulse until which of the following occurs?
A graded potential.
A nerve impulse.
Besides the accessory nerve (XI), which pair of cranial nerves extends beyond the head and neck?
The _______ area that allows us to consciously move our skeletal muscles is anterior to the central sulcus in the _______ lobe.
somatic sensory; frontal
primary motor; parietal
primary motor; temporal
primary motor; frontal lobe
somatic sensory; parietal
The _______ area is located posterior to the central sulcus in the _______ lobe.
primary somatic sensory; parietal
primary somatic sensory; temporal
voluntary motor; occipital
The cell bodies of sensory neurons whose fibers enter the cord are found in the _________.
ventral root ganglion.
dorsal root ganglion.
The cells that produce myelin in the peripheral nervous system (PNS) are called _______ and in the central nervous system (CNS) the cells are called _______.
Schwann cells; microglia
satellite cells; astrocytes.
Schwann cells; oligodendrocytes
astrocytes; Schwann cells
oligodendrocytes; Schwann cells
The central nervous system (CNS) consists of:
the peripheral and autonomic nervous systems.
the brain and spinal cord.
the brain and cranial nerves.
the cranial nerves and spinal nerves.
the spinal cord and spinal nerves.
The motor divisions of the autonomic nervous system (ANS), sympathetic and parasympathetic, are characterized by a two-neuron chain. The pre-ganglionic neuron cell body is found in the _______ and the postganglionic neuron cell body is found _______.
cerebellum; in ganglia in the PNS
central nervous system; in ganglia in the PNS
peripheral nervous system; in nuclei in the CNS
cerebral cortex; in ganglia in the PNS
spinal cord only; in ganglia in the PNS
The sensory or afferent nerve fibers carry information:
away from the CNS.
toward the CNS.
away from the CNS to the ANS.
away from the ANS.
away from the visceral nervous system.
The three connective tissue membranes covering and protecting CNS structures are collectively known as the _______. The _______ is the outermost, leathery layer.
periosteum; dura mater
meninges; dura mater
endosteum; pia mater
meninges; pia mater
What are groups of neuronal cell bodies in the CNS called?
What structure detects the amount of stretch or tension in skeletal muscles, tendons, and joints?
What is the minimum number of neurons that can be involved in a reflex?
The deep groove that separates the two hemispheres of the cerebrum is called the:
Which of the following is/are examples of somatic reflexes?
The regulation of the activity of smooth muscles.
Secretion of saliva.
The stimulation of skeletal muscles.
Change in the size of the pupils of the eye.
Which of the following is NOT a factor which determines the speed of nerve impulse conduction?
Presence of myelin.
Thickness of the axon.
Which of the following substances is/are NOT prevented from entering brain tissue due to the tight junctions that form the blood-brain barrier?
Nonessential amino acids.
Essential amino acids.
Which of the following is NOT a central nervous system glial cell?
Which of the following is NOT TRUE about the patellar reflex?
It is also called the knee-jerk reflex.
It is rarely tested during a physical exam to determine the general health of the motor portion of the nervous system.
It is an example of a two-neuron reflex arc.
The quadriceps muscle tendon is stretched.
It is an example of the simplest type of reflex in humans.
The preganglionic neurons of the parasympathetic division of the autonomic nervous system (ANS) are located in the brain nuclei of which cranial nerves?
III, VII, IX, X.
VI, VII, VIII, IX.
VII, VIII, IX, X.
III, VI, VII, IX.
III, IX, X, XI.
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