Chapter 08: Nervous System Feedback Quiz

A long cell process extending from the neuron cell body is the Select one: a. axon. b. dendrite. c. Nissl body. d. mitochondrion. e. neuroglia.

a. axon. An axon is a long cell process extending from the neuron cell body.

Which nerve plexus gives rise to the musculocutaneous, axillary, ulnar, radial, and median nerves? Select one: a. brachial plexus b. cervical plexus c. coccygeal plexus d. lumbar plexus e. sacral plexus

a. brachial plexus The brachial plexus gives rise to the musculocutaneous, axillary, ulnar, radial, and median nerves.

If an individual is in a coma they have more than likely suffered some damage to cells of the _________, which has the responsibility of maintaining consciousness and regulating sleep-wake cycles. Select one: a. reticular formation b. substantia nigra c. pons d. pineal body e. medulla oblongata

a. reticular formation The reticular formation is a major component of the reticular activating system, which plays an important role in arousing and maintaining consciousness and in regulating sleep-wake cycles. Damage to cells of the reticular formation can result in coma.

Which of these is NOT a neurotransmitter? Select one: a. acetylcholine b. acetylcholinesterase c. norepinephrine d. dopamine e. serotonin

b. acetylcholinesterase Acetylcholinesterase is an enzyme that breaks down acetylcholine in the synaptic cleft soon after it is released from a presynaptic terminal.

Neuroglia that line fluid-filled cavities and produce and circulate cerebrospinal fluid are Select one: a. astrocytes. b. ependymal cells. c. microglia. d. oligodendrocytes. e. Schwann cells.

b. ependymal cells. Ependymal cells are neuroglia that line fluid-filled cavities and produce and circulate cerebrospinal fluid.

Most efferent (motor) neurons and most CNS neurons are Select one: a. bipolar. b. multipolar. c. unipolar. d. neuroglia.

b. multipolar. Most efferent neurons and most CNS neurons are multipolar neurons.

The myelin sheaths around axons in the PNS are formed by Select one: a. oligodendrocytes. b. microglial cells. c. Schwann cells. d. ependymal cells. e. astrocytes.

c. Schwann cells. Schwann cells surround axons with myelin to form myelin sheaths around axons found in the PNS.

Nerves and ganglia that transmit action potentials to smooth muscle, cardiac muscle, and glands are part of the Select one: a. central nervous system. b. somatic division of the peripheral nervous system. c. autonomic nervous system. d. sensory nervous system.

c. autonomic nervous system. The autonomic nervous system transmits action potentials to smooth muscle, cardiac muscle, and glands.

The part of the brain that plays a central role in control of body temperature, hunger, thirst, and emotions, and connects to the pituitary gland is the Select one: a. pineal body. b. colliculi. c. hypothalamus. d. substantia nigra. e. pons.

c. hypothalamus. The hypothalamus is the part of the brain that plays a central role in control of body temperature, hunger, thirst, and emotions, and connects to the pituitary gland.

Given these parts of a reflex arc: 1. afferent (sensory) neuron 2. efferent (motor) neuron 3. effector organ 4. association neuron 5. sensory receptor, Arrange the parts in the order an action potential would travel after a stimulus is received. Select one: a. 2,3,5,4,1 b. 3,5,1,2,4 c. 3,4,1,2,5 d. 5,1,4,2,3 e. 5,2,4,3,1

d. 5,1,4,2,3 The sequence of reflex arc parts in the order an action potential would travel after a stimulus is received is as follows: 5. Sensory receptor, 1. Afferent (sensory) neuron, 4. Association neuron, 2. Efferent (motor) neuron, 3. Effector organ.

Nuclei that control functions such as heart rate regulation, breathing, swallowing, vomiting, coughing, sneezing, balance, and coordination are found in the Select one: a. midbrain. b. pons. c. diencephalon. d. medulla oblongata. e. reticular formation.

d. medulla oblongata. The medulla oblongata contains nuclei that control functions such as heart rate regulation, breathing, swallowing, vomiting, coughing, sneezing, balance, and coordination.

In the PNS, bundles of axons and their connective tissue sheaths are called Select one: a. gray matter. b. ganglia. c. pathways. d. nerves. e. nodes of Ranvier.

d. nerves. Nerves are bundles of parallel axons with their myelin sheaths and their connective tissue sheaths that are in the PNS.

The sympathetic division of the autonomic nervous system Select one: a. has preganglionic cell bodies in the cranial and sacral regions. b. stimulates vegetative activities. c. has many fibers in the vagus nerve (cranial nerve X). d. secretes norepinephrine from most postganglionic neurons.

d. secretes norepinephrine from most postganglionic neurons. The postganglionic neurons of the sympathetic division of the autonomic nervous system secrete the neurotransmitter norepinephrine.

Almost all ascending pathways relaying information to the cerebrum terminate in the Select one: a. medulla oblongata. b. cerebellum. c. pons. d. thalamus. e. midbrain.

d. thalamus. Almost all ascending pathways relaying information to the cerebrum terminate in the thalamus.

Cerebrospinal fluid is produced by the ______ and passes into the blood through the ______. Select one: a. cerebral aqueduct, arachnoid granulations b. choroid plexus, cerebral aqueduct c. arachnoid granulations, choroid plexus d. choroid plexus, central canal e. choroid plexus, arachnoid granulations

e. choroid plexus, arachnoid granulations Cerebrospinal fluid is produced by the choroid plexus and passes into the blood through the arachnoid granulations.