Exam Questions Chapter 31 B Electroencephalography I Biopac® - Laboratory Manual Anatomy & Physiology Cat 4e Test Bank by Terry Martin. DOCX document preview.
Lab Manual for Human Anatomy and Physiology, 4e (Martin)
Chapter 31B Electroencephalography I: BIOPAC® Exercise
1) Which of the following is NOT a bodily function controlled by nerve impulses?
A) Generation of thought processes
B) Muscle contraction
C) Problem solving and other higher mental functions
D) Responses to various stimuli
E) All of these are functions controlled by nerve impulses.
2) An electroencephalogram (EEG) is a recording of an action potential from a single active neuron.
3) The most important ions used in action potentials of neurons are Na+ and K+ ions.
4) Which of the following can NOT be assessed by an EEG?
A) Helps establish brain death
B) Helps determine whether an awake person is concentrating or drowsy
C) Helps assess the state of muscle contraction when a person is lifting objects of various weights
D) Helps to diagnose certain brain disorders
E) All of these can be assessed using an EEG.
5) Which type(s) of EEG waves would you expect to be dominant in an awake person who is relaxing with eyes closed, and not concentrating on anything in particular?
A) Alpha
B) Theta
C) Delta
D) Beta
E) Alpha and beta
6) Which type(s) of EEG waves become(s) dominant in sleeping adults, but also in some forms of brain disease?
A) Delta
B) Alpha and beta
C) Beta
D) Theta
E) Delta and theta
7) Which of the following brain waves has the highest frequency?
A) Theta
B) Beta
C) Delta
D) Gamma
E) Alphaw
8) A high degree of alertness is indicated in the EEG by
A) brain waves with a low frequency.
B) brain waves with a high amplitude.
C) brain waves with a medium amplitude and a medium frequency.
D) brain waves with a high frequency.
E) brain waves with a low amplitude.
9) Many neurons firing in synchrony results in a brain wave with high amplitude.
10) All 4 types of brain waves can usually be observed in the EEG of a normal adult.
11) How is desynchronization of the alpha waves observed in the EEG, when a person with eyes closed suddenly opens them?
A) The amplitude of the alpha wave increases.
B) The frequency of the alpha wave increases.
C) The amplitude of the alpha wave decreases.
D) The frequency of the alpha wave decreases.
E) The alpha waves stop, as shown by an amplitude and a frequency of 0.
12) The amplitude of brain waves in the EEG experiment is measured in units of
A) millimeters.
B) inches.
C) amperes.
D) microvolts.
E) Hertz.
13) Which of the following factors does NOT contribute to individual differences in the characteristics of brain waves?
A) Personality
B) Gender
C) Age
D) Type of activity the person is engaged in
E) All of these factors contribute to individual differences in the characteristics of brain waves.
14) Which of the following is NOT true of the bipolar method of recording the EEG?
A) The 2 main electrodes are placed on opposite sides of the head.
B) The electrical potential difference is measured between the 2 main recording electrodes.
C) The ground electrode is used as a reference point for the body's baseline voltage.
D) The 2 main recording electrodes detect the movement of ions in the extracellular fluid of the cerebral cortex.
E) All of these are true of the bipolar method of recording the EEG.
15) Alpha block occurs when a person closes his/her eyes, and changes from a state of concentration to a state of relaxation.
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Laboratory Manual Anatomy & Physiology Cat 4e Test Bank
By Terry Martin