Concept explainers
To determine:
The justification for the fact that it is impossible to use all of the air in a space in contrast to the fear of the claustrophobic person.
Introduction:
Air is a mixture of gases like nitrogen, oxygen, carbon dioxide, and many more are present in the air. These gases are present in a definite proportion. Alteration in the proportion of gases is known as pollution.
To determine:
The changes in the air when an individual respire and whether these changes are dangerous or not.
Introduction:
Respiration is the biological process including inhaling of fresh air, oxidation of food in the presence of air and exhaling the foul air from the body. Inhaling and exhaling of air together called breathing or external respiration.
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BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
- The respiratory system_______. a. provides body tissues with oxygen b. provides body tissues with oxygen and carbon dioxide c. establishes how many breaths are taken per minute d. provides the body with carbon dioxidearrow_forwardBreathing _______. a. ventilates the lungs b. draws air into airways c. expels air from airways d. causes reversals in pressure gradients e. all of the abovearrow_forwardDuring inhalation, ________. a. the thoracic cavity expands d. the diaphragm relaxes c. atmospheric pressure declines d. the lungs deflatearrow_forward
- A partial pressure gradient of oxygen exists between ________. a. air and lungs b. lungs and metabolically active tissues c. air at sea level and air at high altitudes d. all of the abovearrow_forwardWe inhale oxygen when we breathe and exhale carbon dioxide. What is the oxygen used for and where does the carbon dioxide come from?arrow_forwardThe respiratory components of the medulla consist of which of the following? Dorsal respiratory group Apneustic center Ventral respiratory group Pneumotaxic center 1 only 2 only 1 and 3 only 2 and 4 onlyarrow_forward
- Figure 16.9 Which of the following statements about the human respiratory system is false? a. When we breathe in, air travels from the pharynx to the trachea. b. The bronchioles branch into bronchi. c. Alveolar ducts connect to alveolar sacs. d. Gas exchange between the lungs and blood takes place in the alveolus.arrow_forwardOxygen in air must diffuse across______ to enter the blood. a. pleural sacs b. alveolar sacs c. a moist respiratory surface d. both b and carrow_forwardIn______, gas exchange occurs at the body surface and gas is distributed by diffusion alone. a. earthworm c. frogs b. flatworms d. insectsarrow_forward
- Due to its partial pressure gradient, carbon dioxide diffuses from cells into tissue fluid and into the ________; in the lungs, carbon dioxide diffuses into the ________. a. alveoli; bronchioles b. bloodstream; bronchioles c. alveoli; bloodstream d. bloodstream; alveoliarrow_forwardWhich is the order of airflow during inhalation? a. nasal cavity, trachea, larynx, bronchi, bronchioles, alveoli b. nasal cavity, larynx, trachea, bronchi, bronchioles, alveoli c. nasal cavity, larynx, trachea, bronchioles, bronchi, alveoli d. nasal cavity, trachea, larynx, bronchi, bronchioles, alveoliarrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningBasic Clinical Lab Competencies for Respiratory C...NursingISBN:9781285244662Author:WhitePublisher:CengageHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning