The following test is the self test for both the above unit and the previous unit.
Open the following link as a new window to view the answer key for the following test questions: ANSWER KEY
Nervous System Self Test
1. Which of the following are parts of neurons?
a. brain, spinal cord, and vertebral column
b. dendrite, axon, and cell body
c. sensory and motor
d. cortex, medulla and sheath
2. A dendrite conducts nerve impulses ________ the cell body.
a. away from
b. toward
c. both toward and away from
d. around, bypassing
3. An axon conducts nerve impulses _________ the cell body.
a. away from
b. toward
c. both toward and away from
d. around, bypassing
4. Which of the following is/are type(s) of neurons?
a. sensory
b. motor
c. interneurons
d. all of the above
5. True or false. A sensory neuron has a short dendrite and a long axon.
6. True or false. A motor neuron has short dendrites and a long axon.
7. A sensory neuron is also referred to as a/an ________ neuron.
a. association
b. efferent
c. afferent
d. peripheral
8. True or false. A motor neuron is also referred to as the association neuron.
9. Like sensory and motor neurons, an interneuron also has one other name by which it is called: ______________.
a. association
b. efferent
c. afferent
d. peripheral
10. An interneuron has _____________.
a. long dendrites and a short axon
b. long dendrites and a long axon
c. short dendrites and a long axon
d. short dendrites and a long or short axon
11. Schwann cells are one of several types of ________ cells in the nervous system.
a. sensory
b. motor
c. association
d. neuroglial
12. True or false. Schwann cells are the main neurons of the spinal cord.
13. Neuroglial cells support and provide nutrition for the ________.
a. muscle cells
b. glands
c. neurons
d. nephrons
14. True or false. Schwann cells produce layers of membrane containing myelin, which provides nutrition for the dendrites.
15. True or false. Nerve impulses go from sensory neurons in sense organs directly to the muscles and glands that respond.
16. True or false. A nerve impulse is the way a sensory neuron receives information.
17. Nerve impulses create a change in voltage which is measured by and can be seen on a(n) ________.
a. stethoscope
b. electrocardiogram
c. oscilloscope
d. laparoscope
18. Axoplasm is the ________ .
a. blood plasma that nourishes a nerve
b. fluid external to the axon but inside the myelin sheath
c. cytoplasm of the dendrite
d. cytoplasm of the axon
19. True or false. When the axon is conducting an impulse, the oscilloscope records a constant membrane potential, equal to about -65mV.
20. The resting potential indicates that the inside of the neuron is ________ compared to the outside.
a. under ionic pressure
b. positive
c. negative
d. inactive
21. . The "sodium-potassium pump" pumps ___________.
a. sodium ions out and potassium ions in
b. sodium ions in and potassium ions out
c. sodium and potassium ions in
d. sodium and potassium ions out
22. An axon can be stimulated to conduct a nerve impulse by ___________.
a. electric shock
b. sudden change in pH
c. a physical pinch
d. all of the above
23. The pattern that appears on the oscilloscope screen is caused by rapid ________.
a. polarity changes
b. pH changes
c. breakdown of the membrane structure
d. all of the above
24. The action potential is measured in millivolts (mV) and is ranged from:
a. -90mV to +20mV
b. -70mV to +30mV
c. -65mV to +40mV
d. -30mV to +60mV
25. Depolarization of the axomembrane is recorded as the gates open, allowing ________ to flow into the axon.
a. potassium ions
b. H+ ions
c. sodium ions
d. all of the above
26. True or false. The action potential changes the charge inside the axon from positive to negative.
27. As the action potential swings down,
a. potassium ions move out of the axon.
b. potassium ions move into the axon.
c. sodium ions move into the axon.
28. As the potassium ions move out of the axon, the oscilloscope records a ________.
a. depolarization
b. repolarization
c. equalizing of negative and positive ions
d. shutdown of the membrane pumps
29. A refractory period is___________.
a. a brief time when a neuron is unable to conduct an impulse
b. the period during which potassium and sodium ions are completely stable
c. the same as the resting potential
d. the short time the myelin sheath provides insulation from another impulse
e. is a reverse impulse that resets the sodium and potassium balance
30. In humans, transmission of nerve impulses across a synaptic cleft is carried out by ________.
a. sodium ions
b. potassium ions
c. neurotransmitter molecules
d. the nodes of Ranvier
31. Neurotransmitter molecules diffuse across a cleft to the postsynaptic membrane, where they bind with a receptor in a ________ .
a. ionic bond
b. lock-and-key manner
c. permanent covalent bond
d. refractory manner
32. Acetylcholine and norepinephrine are two well-known _________.
a. postsynaptic receptors
b. enzymes that rapidly inactivate neurotransmitters
c. drugs of abuse
d. neurotransmitters
33. Which of the following is NOT a neurotransmitter?
a. acetylcholine
b. serotonin
c. dopamine
d. acetylcholinesterase
34. Acetylcholine and norepinephrine are excitatory or inhibitory according to the type of receptor at the ________ membrane.
a. axonal
b. cell body
c. presynaptic
d. postsynaptic
e. nuclear
35. What are the main divisions of the nervous system?
a. the sensory system and the motor system
b. the peripheral nervous system and central nervous system
c. the dendritic and the axonal systems
d. the sympathetic and parasympathetic systems
36. The peripheral nervous system includes the nerves, which project from the ________.
a. CNS
b. PNS
c. motor system
d. autonomic system
37. True or False. The peripheral nervous system (PNS) lies outside the central nervous
system (CNS).
38. The PNS nerves are part of either the somatic system or the ________ .
a. motor system
b. central nervous system
c. sympathetic system
d. parasympathetic system
e. autonomic system
39. The somatic system contains nerves that control _________.
a. skeletal muscles, skin, and joints.
b. internal organs, joints, and glands.
c. skeletal muscles, skin, and glands.
d. smooth muscles, cardiac muscles and glands
40. True or false. Nerves are structures that contain many short fibers joined end-to-end.
41. True or false. A nerve fiber obeys the all-or-none law.
42. True or false. A nerve obeys the all-or-none law.
43. The somatic nervous system includes mixed nerves that serve the _____________.
a. musculoskeletal system and the exterior sense organs, including those in skin
b. sympathetic system
c. parasympathetic system
d. heart, internal glands, and most digestive organs
44. The sensory neurons that come from internal organs send impulses to the CNS where reflex actions _________ .
a. are critical to conscious decision making
b. are especially important to the maintenance of homeostasis
c. trigger all neurotransmitters
d. control our emotional moods
45. Which of the following are characteristic of the sympathetic system?
a. inhibits the digestive tract
b. dilates the bronchi
c. accelerates the heartbeat
d. all of the above
46. True or false. The parasympathetic system is called the "housekeeper system" because it keeps us alert and ready for "fight or flight."
47. Which of the following is/are characteristic of the parasympathetic system?
a. causes the pupil to contract
b. promotes digestion of food
c. retards the heartbeat
d. all of the above
48. The central nervous system consists of the ____________.
a. combination of the sympathetic and parasympathetic nervous systems
b. brain and spinal cord
c. combined sensory and motor systems
d. cranial and spinal nerves
49. The part of the body that integrates the information it receives from all over the body in order to make decisions is called the ________.
a. peripheral nervous system
b. sympathetic nervous system
c. parasympathetic nervous system
d. central nervous system
50. True or false. The central nervous system consists only of the brain.
51. Consciousness resides primarily in the ________.
a. medulla oblongata
b. cerebellum
c. cerebrum
d. pons
52. The ________ contains centers for heartbeat, breathing, and blood pressure.
a. cerebellum
b. cerebrum
c. spinal cord
d. medulla oblongata
53. The medulla oblongata contains reflex centers for _______________.
a. vomiting, coughing, sneezing, hiccuping, and swallowing
b. kneejerk and blinking
c. sexual response
d. fast responses on test questions
54. The function of the cerebellum is ___________.
a. consciousness
b. muscle coordination
c. homeostasis
d. sense reception
55. True or false. The two halves of the brain, the left brain and the right brain, are NOT connected and share no communication.