38. . Respiratory rate can be determined by: a. Counting the number of breaths p

Question

38. . Respiratory rate can be determined by: a. Counting the number of breaths per minute b. Plethysmography, which involves assessing blood flow through the finger e. An electrocard iogram, which involves assessing electrical activity of the respiratory system d. Any of the above procedures can be used to determine respiratory rate 39. When using the pulse plethysmograph on a subject, there are low amplitude peaks seen, at the rate of 70 per minute. What can you conclude from this data? a. There is inadequate blood flow through the finger due to poor circulation b. Heart rate is normal, while blood pressure is somewhat low c. Heart rate is high, while blood pressure is high d. Respiratory rate is low and also blood pressure is low 40. Which of the following changes in the electrical activity of a muscle as reflected by EMG data is expected as the muscle develops more force? a. Increasing amplitude of the EMG waves b. Increasing frequency EMG waves c. Both a and b 41. From where does the electrical activity measured by the EMG originate? a. Sarcoplasmic reticulum b. Motor neuron c. Sarcomere d. Mitochondria 42. What technique is used to analyze the changes in frequency of electrical activity within a musc le? a. EEG b. spectral analysis c. PPG d. All of the above can be used

Explanation / Answer

Ans 38: The choice is (D).

Respiratory rate can be determined by breaths per minute, Plethysmography and ECG. Any of these methods can be used.

Ans 39: The choice is(a).

The low amplitude peak is seen because of inadequate blood flow through the finger due to poor circulation. The poor circulation can be because of some obstruction.

Ans 40: The choice is (c).

As the muscle develops more force, there is increase in amplitude and increase in frequency of the EMG waves.

Ans 41: The choice is (b).

Electrical activity measured by the EMG originates at Motor neuron produced by CNS.

Ans 42: The choice is (b).

Spectral analysis is used to analyze the changes in frequency of electrical activity within a muscle.

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