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WorksheetsQuiz 1
Total questions: 19
Worksheet time: 13mins
Which statement defines the CNS?
A system of glands and hormones
The integrating and command center; consists of the brain and spinal cord
The main group of sensory receptors in the skin
The part of the PNS that controls smooth muscles
What are the three overlapping functions of the nervous system? (Select ALL that apply)
Sensory receptors monitor changes inside and outside the body
Process and interpret sensory input (integration)
Produce hormones for digestion
Dictate a response by activating effector organs (motor output)
Which of the following are included in the visceral body region? (Select ALL that apply)
Skeletal musculature
Digestive tube
Heart
Skin
Bladder
Which pairs correctly match neuron type to functional classification? (Select ALL that apply)
Sensory (afferent) neurons — virtually all unipolar
Motor (efferent) neurons — mostly bipolar
Interneurons — mostly multipolar
Sensory neurons — cell bodies in ganglia outside CNS
Which statement about chromatophilic (Nissl) bodies and neurofibrils is TRUE? (Multiple Answers)
Chromatophilic bodies renew cell membranes and stain darkly.
Neurofibrils form a network between chromatophilic bodies.
Both structures occur in axons only.
Both are involved in protein synthesis within the axon terminal.
Which statements about the general somatic senses and proprioceptive senses are true? (Select ALL that apply)
General somatic senses include pressure, vibration, pain, and temperature.
Proprioceptive senses detect stretch in tendons and muscles.
General somatic senses detect internal organ stretch.
Proprioception gives the body a sense of its position in space.
Which statements are TRUE about axon branching and terminals? (Select ALL that apply)
Axons frequently branch along their entire length.
Terminal branches are called telodendria.
Axon terminals store neurotransmitters in tiny vesicles.
Axons contain rough ER to make neurotransmitters.
Which glial cells are properly paired with a unique feature or function? (Select ALL that apply)
Astrocytes — take up and release ions to control environment
Microglia — derived from monocytes
Ependymal cells — have cilia to circulate cerebrospinal fluid
Oligodendrocytes — surround neuron cell bodies in ganglia
Regarding myelin sheaths in the PNS, which statements are CORRECT? (Select ALL that apply)
Formed by Schwann cells wrapping in concentric layers
Create a continuous sheath without any gaps
Gaps between Schwann cells are called Nodes of Ranvier
Thick axons are myelinated; thin axons are unmyelinated
Which supporting cell is found in the PNS and what is its precise role?
Satellite cells — surround neuron cell bodies within ganglia
Schwann cells — produce cerebrospinal fluid
Oligodendrocytes — form myelin sheaths in the PNS
Astrocytes — form myelin sheaths in the CNS
Which are structural features of nerves in the PNS? (Select ALL that apply)
Each axon is surrounded by Schwann cells and loose CT called endoneurium.
Fascicles are groups of axons bundled together.
Perineurium surrounds each individual axon.
Epineurium surrounds the whole nerve.
Which statements about reflex arcs are TRUE? (Select ALL that apply)
Reflex arcs have exactly two components.
Reflex arcs explain reflex behaviors and basic neural organization.
Monosynaptic reflexes have just one synapse and are fastest.
Polysynaptic reflexes typically have a single interneuron.
Regarding gray and white matter in the CNS, which is CORRECT? (Select ALL that apply)
Gray matter contains neuron cell bodies and surrounds the central cavity in the spinal cord.
The dorsal half of gray matter holds motor neuron cell bodies.
White matter contains millions of axons but no cell bodies.
White matter color comes from the myelin sheath covering axons.
Virtually all sensory (afferent) neurons are ____ neurons whose cell bodies lie ____.
multipolar; within the CNS
bipolar; inside gray matter
unipolar; in ganglia outside the CNS
unipolar; embedded in spinal cord tracts
About functional neuron types. Select all true answers.
Motor (efferent) neurons are mostly multipolar.
Motor neurons form junctions with effector cells.
Interneurons are exclusively found in the PNS.
Interneurons are mostly multipolar.
Bundles of axons running between different parts of the CNS are called ____.
Nodes
Tracts
Ganglia
Telodendria
Regarding nervous tissue properties, select all true answers.
Neurons are excitable and conduct signals along their plasma membrane.
Neurons routinely undergo mitosis in adults.
Glial cells can divide throughout life.
Nervous tissue is composed of neurons and support cells.
Ependymal cells form a simple epithelium that lines ____ and have ____.
the outer brain cortex; cilia
the central cavity of the spinal cord and brain; cilia
nodes of Ranvier; no projections
axon terminals; vesicles
About reflex arcs, mark each as True statement
A receptor is the site where the stimulus acts.
The integration center consists of one or more synapses in the CNS.
Motor neuron conducts efferent impulses from the integration center to an effector.
The effector can be only a skeletal muscle.
