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Unformatted text preview: tral chemoreceptors do not play an important role in respiration. c. Central chemoreceptors are separated from the blood by the blood brain barrier d. There are 2 types of chemoreceptors: peripheral and central. e. Peripheral chemoreceptors are located outside the central nervous system. 4. Which statement(s) is/are true? a. Pulmonary stretch receptors are innervated by myelinated fibers. b. Juxta‐capillary receptors are innervated by non‐myelinated fibers. c. Intense stimulation of the juxta‐capillary receptors causes apnea. d. The Hering‐Breuer reflex results from stimulation of the pulmonary stretch receptors. e. All of the above statements are true. Type B: Choose the best option. a. a, b, c b. a, c c. b, d d. d e. All or none of the above 1. Peripheral chemoreceptors detect PO2, PCO2 and pH in the arterial blood and carry this information to respiratory neurons. The activity of respiratory neurons will increase if: a. PaO2 < 60 mmHg b. PaCO2 > 40 mmHg c. pH decreases d. pH incr...
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- Winter '08