/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 10 How would paralysis of the diaph... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 30: Problem 10

How would paralysis of the diaphragm alter inspiration? a. It would prevent contraction of the intercostal muscles. b. It would prevent inhalation because the intrapleural pressure would not change. c. It would decrease the intrapleural pressure and allow more air to enter the lungs. d. It would slow expiration because the lung would not relax.

Short Answer

Expert verified
b. It would prevent inhalation because the intrapleural pressure would not change.

Step by step solution

01

Understanding the Diaphragm's Role

The diaphragm is the primary muscle responsible for inspiration. When it contracts, it moves downward, increasing the volume of the thoracic cavity and decreasing the intrapleural pressure, allowing air to flow into the lungs.
02

Analyzing the Effects of Paralysis

If the diaphragm is paralyzed, it will not contract. This means the thoracic cavity volume cannot increase, and the intrapleural pressure remains unchanged. Therefore, air will not be drawn into the lungs effectively, preventing proper inhalation.
03

Evaluating the Answer Choices

Let's evaluate each option based on the information we've analyzed:(a) Incorrect: Paralysis of the diaphragm does not directly affect the contraction of the intercostal muscles.(b) Correct: Without the diaphragm contracting, intrapleural pressure will not change, preventing inhalation.(c) Incorrect: Paralysis would not decrease intrapleural pressure; it stays the same.(d) Incorrect: Paralysis of the diaphragm affects inhalation, not expiration.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Inspiration Mechanism
Inspiration, or inhalation, is the process of drawing air into the lungs. Normally, this process is primarily driven by the diaphragm, a dome-shaped muscle that sits below the lungs. When the diaphragm contracts, it moves downward.
This movement expands the thoracic cavity, the space within your chest that houses the lungs. As the volume of the thoracic cavity increases, the pressure inside this cavity drops.
This lowered pressure creates a vacuum effect, pulling air into the lungs through the nose and mouth. Inspiration is essential for delivering oxygen to the body, which is then used in cellular processes to produce energy.
  • Diaphragm contraction is key
  • Thoracic cavity volume increases
  • Pressure inside the thoracic cavity decreases
  • Air flows into the lungs
Intrapleural Pressure
Intrapleural pressure is the pressure within the pleural cavity, a tiny space between the lungs and the chest wall. This pressure is always slightly negative relative to the atmospheric pressure outside the body. This negative pressure is crucial because it keeps the lungs slightly inflated and ready to expand during inspiration.
During normal breathing, when the diaphragm contracts and the thoracic cavity expands, the intrapleural pressure becomes even more negative. This further drop in pressure helps to pull air into the lungs.
  • Normally slightly negative
  • Becomes more negative during inhalation
  • Helps draw air into the lungs
In cases of diaphragm paralysis, this pressure does not change effectively, resulting in difficulty or inability to draw air into the lungs.
Thoracic Cavity Volume
The volume of the thoracic cavity is a major player in the mechanics of breathing. This cavity changes in size primarily due to the actions of muscles like the diaphragm and intercostal muscles (muscles between the ribs). When these muscles contract, the volume of the thoracic cavity increases.
This increase in volume lowers the intrapleural pressure, creating a pressure gradient that pulls air into the lungs. Thus, proper function of the diaphragm is vital for increasing the thoracic cavity volume.
  • Diaphragm and intercostal muscles help expand it
  • Increased volume lowers intrapleural pressure
  • Essential for drawing air into the lungs
When the diaphragm is paralyzed, the thoracic cavity can't expand properly, leading to ineffective breathing.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

How does the administration of 100 percent oxygen save a patient from carbon monoxide poisoning? Why wouldn鈥檛 giving carbon dioxide work? a. At that concentration, oxygen will be transported in the body at a high rate by dissolving in blood. Oxygen has more affinity for hemoglobin than carbon dioxide. b. At that concentration, oxygen will displace the carbon monoxide from the hemoglobin. Oxygen has more affinity for hemoglobin than carbon dioxide. c. At that concentration, oxygen will displace the carbon monoxide from the hemoglobin. Carbon dioxide has more affinity for hemoglobin than oxygen. d. At that concentration, oxygen will be transported in the body at a high rate by dissolving in blood. Carbon dioxide has more affinity for hemoglobin than oxygen.

How is the chloride shift related to the transport of carbon dioxide in the blood? a. It allows carbon dioxide, in the form of bicarbonate ions, to enter the blood plasma. b. It creates carbaminohemoglobin within the red blood cells. c. It allows the conversion of carbon dioxide into carbonic acid within red blood cells. d. It prevents the formation of bicarbonate ions in the blood.

Which of the following will not facilitate the transfer of oxygen to tissues? a. decreased body temperature b. decreased pH of the blood c. increased carbon dioxide d. increased exercise

The inspiratory reserve volume measures the____. a. amount of air remaining in the lung after a maximal exhalation b. amount of air the lung holds c. amount of air that can be further exhaled after a normal breath d. amount of air that can be further inhaled after a normal breath

What does elastic recoil in the lungs refer to and does it aid inspiration or expiration? a. the ability of the diaphragm to contract and relax to change the volume of the lung, inspiration b. the reserve air in the lungs that is present even after maximum exhalation, expiration c. the ability of the bronchioles to expand and retract as air enters and exits, inspiration d. the ability of lung tissue to exert pressure back towards the lung鈥檚 interior, expiration
See all solutions

Recommended explanations on Biology Textbooks

Ecological Levels

Read Explanation

Organ Systems

Read Explanation

Substance Exchange

Read Explanation

Biology Experiments

Read Explanation

Biological Structures

Read Explanation

Plant Biology

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.