Question

_________ receptors in the _________ respond to chemical stimuli that result in _________.

Select one:

A. Irritant; conducting airways of the lungs; discharge of a cough or sneeze

B. Chemical; alveoli of the lungs; deeper breathing

C. Stretch; smooth muscles of the lungs; increased respiratory rate

D. Chemical; in the brain stem; decreased respiratory rate and depth of breathing

Answer 1

The correct answer is A). Irritant receptors , conducting airways of the lungs ; dischargeod a cough or sneeze.

(A)Pulmonary Irritant Receptors are sensors present within the respiratory epithelium which can sense and respond to a variety of chemical irritants. Afferent signals from these sensory cells may initiate coughing in response to a variety of inhaled irritants and might induce bronchoconstriction in those with asthma.

(B)Juxtacapillary, receptors are located in the alveolar walls in close proximity to the capillaries. Because of their location, these receptors respond readily to chemicals in the pulmonary circulation, distention of the pulmonary capillary walls, and accumulation of interstitial fluid.

(C )Pulmonary stretch receptors are mechanoreceptors found in the lungs. When the lung expands, the receptors initiate the Hering-Breuer reflex, which reduces the respiratory rate. Increased firing from the stretch receptors also increases production of pulmonary surfactant

(D) CO2 involves the carotid body and receptors in the brainstem, central chemoreceptors. Small increases in CO2 produce large increases in breathing. ... Geographical specificity; all regions of the brainstem with respiratory neurons contain chemoreceptors.