FREE PHYSIOLOGY AND STUDY GAMES ABOUT BIO202

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FREE PHYSIOLOGY AND STUDY GAMES ABOUT BIO202

CHAPT. 8 RESP EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -110 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Trace a molecule of oxygen from the external nares to the pulmonary

capillaries of the lungs.

Answer:

External nares to the nasal cavity to the pharynx to the larynx to the trachea to the primary bronchus to the secondary/tertiary bronchi, etc. to the bronchiole to the respiratory bronchiole to the alveolar duct to the alveolar sac across the alveolar/cap

Question 2: What buffer system operates in blood plasma?

Answer:

Carbonic acid - bicarbonate system.Question 3: Where are sensory receptors sensitive to changes in O2 levels in the blood located?

Answer:

aortic arch or aortic bodies and carotid sinus or carotid bodies or common carotid arteryor bifurcation.Question 4: Vocal cord attachment:

Answer:

Arytenoid

Question 5: Increased Temperature results in decreased oxygen unloading from hemoglobin.

Answer:

False Question 6: The factors responsible for holding the lungs to the thorax wall are:

Answer:

Surface tension from pleural fluid, positive pressure, and atmospheric pressure on the thorax Question 7: Contains the vocal cords:

Answer:

Larynx

Question 8: An inspiratory muscle.

Answer:

Diaphragm Question 9: The respiratory membrane is composed of bused basal laminas for capillary walls and

Answer:

Type I Cells Question 10: Where are sensory receptors sensitive to changes in "blood pressure" located?

Answer:

Aortic bodies in the aortic arch and carotid bodies at the bifurcation of the common carotid artery Question 11: The presence of a partial vacuum between the pleural membranes is integral to normal breathing movements. What would happen if an opening were made into the chest cavity, as with a puncture wound?

Answer:

Destroys the partial vacuum in the pleural space and the lung on the affected side collapses.Question 12: The pleurae are vital to the integrity of the lungs because:

Answer:

They produce a lubricating serous secretion, allowing the lungs to glide over the thorax wall during breathing

Question 13: The pleura is a thin, single layered serosa that divides into parietal and visceral pleura.

Answer:

False Question 14: Why does hyperventilation produce apnea, or a reduced respiratory rate?

Answer:

Hyperventilation washes carbon dioxide out of the blood. Since carbon dioxide is the major chemical stimulus for inspiration, the desire or drive to breathe is decreased.

Question 15: Volume of air corresponding to TV + IRV + ERV =

Answer:

vital capacity (~4800 ml) Question 16: The internal conditions where air tends to flow into the lungs are increased thoracic volume and decreased pressure.

Answer:

True Question 17: What role does exhalation of carbon dioxide play in maintaining relatively constant blood pH?

Answer:

Carbon dioxide leaves the blood during exhalation. This prevents an accumulation of carbonic acid.Question 18: Forms the Adam's apple:

Answer:

thyroid Question 19: Food passageway posterior to the trachea:

Answer:

Esophagus Question 20: Nerve that activates the diaphragm during inspiration:

Answer:

Phrenic Nerve

Question 21: Inspiratory capacity is:

Answer:

The total amount of air that can be inspired after a tidal expiration

Question 22: The physiological term for breathing.

Answer:

Pulmonary Ventilation Question 23: Which of the following provide the greatest surface area for gas exchange?

Answer:

Alveoli Question 24: The erythrocyte count increases after a while when an individual goes form a low

to a high altitude because:

Answer:

The concentration of oxygen and/or total atmospheric pressure is lower at high altitudes Question 25: What temporary physiological advantage does the substantial increase in chest circumference during forced inspiration create?

Answer:

Increases the thoracic volume more; therefore, creates a greater negative internal pressure, causing the gases to rush in quickly. Also, more "fresh" air reaches the alveoli.Question 26: Which of the following choices best describes the percentage of composition of air of Inspired and Expired O2?

Answer:

Inspired O2: ~21%; Expired O2: ~16% Question 27: Covers the glottis during swallowing of food:

Answer:

Epiglottis

Question 28: Labored breathing is called dyspnea.

Answer:

True