100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
BRS PHYSIOLOGY: RESPIRATORY EXAM QUESTIONS WITH COMPLETE VERIFIED SOLUTIONS GRADED A++ R196,00   Add to cart
Quickly navigate to
Preview
  2.  
  3. BRS PHYSIOLOGY
  4.  
  5. BRS PHYSIOLOGY

Exam (elaborations)

BRS PHYSIOLOGY: RESPIRATORY EXAM QUESTIONS WITH COMPLETE VERIFIED SOLUTIONS GRADED A++
 1 view  0 purchase
  • Course
  • BRS PHYSIOLOGY
  • Institution
  • BRS PHYSIOLOGY

BRS PHYSIOLOGY: RESPIRATORY EXAM QUESTIONS WITH COMPLETE VERIFIED SOLUTIONS GRADED A++ 1. The answer is E [I A 4, 5, B 2, 3, 5]. Residual volume (RV) cannot be measured by spirometry. Therefore, any lung volume or capacity that includes the RV cannot be measured by spirometry. Measurements that in...

[Show more]

Preview 3 out of 19  pages

Document information

  • November 14, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • brs physiology respiratory exam questions with co

Written for

  • BRS PHYSIOLOGY
All documents for this subject (26)

Seller

avatar-seller
AcademicSuperScores

Reviews received

Content preview

BRS PHYSIOLOGY: RESPIRATORY EXAM QUESTIONS WITH

COMPLETE VERIFIED SOLUTIONS GRADED A++

1. The answer is E [I A 4, 5, B 2, 3, 5]. Residual volume (RV) cannot be measured

by spirometry. Therefore, any lung volume or capacity that includes the RV

cannot be measured by spirometry. Measurements that include RV are functional

residual capacity (FRC) and total lung capacity (TLC). Vital capacity (VC) does not

include RV and is, therefore, measurable by spirometry. Physiologic dead space

is not measurable by spirometry and requires sampling of arterial PCO2 and

expired CO2.

1. Which of the following lung volumes or capacities can be measured by spirometry?

(A) Functional residual capacity (FRC)

(B) Physiologic dead space

(C) Residual volume (RV)

(D) Total lung capacity (TLC)

(E) Vital capacity (VC)

2. The answer is B [II D 2]. Neonatal respiratory distress syndrome is caused by

lack of adequate surfactant in the immature lung. Surfactant appears between the

24th and the 35th gestational week. In the absence of surfactant, the surface

tension of the small alveoli is too high. When the pressure on the small alveoli is

too high (P = 2T/r), the small alveoli collapse into larger alveoli. There is

decreased gas exchange with the larger, collapsed alveoli, and V/Q mismatch,

,hypoxemia, and cyanosis occur. The lack of surfactant also decreases lung

compliance, making it harder to inflate the lungs, increasing the work of

breathing, and producing dyspnea. Generally, lecithin:sphingomyelin ratios

greater than 2:1 signify mature levels of surfactant.

2. An infant born prematurely in gestational week 25 has neonatal respiratory distress

syndrome. Which of the following would be expected in this infant?

(A) Arterial PO2 of 100 mm Hg

(B) Collapse of the small alveoli

(C) Increased lung compliance

(D) Normal breathing rate

(E) Lecithin:sphingomyelin ratio of greater than 2:1 in amniotic fluid

3. The answer is B [VI C]. Pulmonary blood flow is controlled locally by the PO2 of

alveolar

air. Hypoxia causes pulmonary vasoconstriction and thereby shunts blood away

from unventilated areas of the lung, where it would be wasted. In the coronary

circulation,

hypoxemia causes vasodilation. The cerebral, muscle, and skin circulations are

not controlled directly by PO2.

3. In which vascular bed does hypoxia cause vasoconstriction?

(A) Coronary

(B) Pulmonary

(C) Cerebral

, (D) Muscle

(E) Skin

4. The answer is D [VIII B 2 a]. The patient's arterial PCO2 is lower than the normal

value of 40 mm Hg because hypoxemia has stimulated peripheral

chemoreceptors to increase his breathing rate; hyperventilation causes the

patient to blow off extra CO2 and results in respiratory alkalosis. In an obstructive

disease, such as asthma, both forced expiratory volume (FEV1) and forced vital

capacity (FVC) are decreased, with the larger decrease occurring in FEV1.

Therefore, the FEV1/FVC ratio is decreased. Poor ventilation of the affected areas

decreases the V/Q ratio and causes hypoxemia. The patient's residual volume

(RV) is increased because he is breathing at a higher lung volume to offset the

increased resistance of his airways.

4. Which of the following statements about this patient is most likely to be true?

(A) Forced expiratory volume/forced vital capacity (FEV1/FVC) is increased

(B) Ventilation/perfusion (V/Q) ratio is increased in the affected areas of his lungs

(C) His arterial PCO2 is higher than normal because of inadequate gas exchange

(D) His arterial PCO2 is lower than normal because hypoxemia is causing him to

hyperventilate

(E) His residual volume (RV) is decreased

5. The answer is C [II E 3 a (2)]. A cause of airway obstruction in asthma is

bronchiolar constriction. β2-adrenergic stimulation (β2-adrenergic agonists)

produces relaxation of the bronchioles.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying this summary from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller AcademicSuperScores. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for R196,00. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

75632 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy summaries for 14 years now

Start selling
R196,00
  • (0)
  Buy now