Chapter 16 Answers – Flashcards with Answers
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The smallest branches of a respiratory system tubes terminate in clusters of microscopic air sacs called
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Alveoli
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Blood enters the lungs from the heart through major artery known as the
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Pulmonary artery
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The mouth and nasal cavities meet in a region called the
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Pharynx
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The nasal cavities open to the external environment at the nostrils also called the
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External nares
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Many bones of the skull contain openings from the nasal cavity is referred to as
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Sinuses
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At the roof of the nasal cavities the sense of smell is associated with an area called the
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olfactory region
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Three functions of the nose include moisturizing the air filtering the air and
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Warming the air
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Another name for the pharynx is the
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Throat
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The lateral walls of the nasopharynx contain openings of tubes from the middle ear known as
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auditory tubes
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The largest cartilage of the larynx also known as the Adam's apple is that
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Thyroid cartilage
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The cartilage of the larynx that resembles a Signet ring and connects the trachea and larynx is the
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Cricoid cartilage
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The opening to the larynx is referred to as the
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Glottis
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Vibrations of the vocal cords are due to air exhaled from the
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Lungs
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Because men have longer vocal cords their voices have lower
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pitch
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The trachea is supported by a series of C shaped rings of
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Cartilage
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The two primary tubes that Branch from the trachea are the
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Bronchi
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The bronchiole walls are composed mostly of muscle referred to as
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Smooth muscle
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The common name for inflammation of the bronchial tree is
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Bronchitis
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The lungs occupy most of the space of the
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Thoracic cavity
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The left lung is subdivided into two lobes while the right lung is subdivided into
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Three lobes
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The two layer membrane surrounding each lung is the
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Pleura
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What underlying principle of breathing is that air flows from a region of high pressure to a region of
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Low pressure
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Pressure changes occurring in the lungs can be traced to the activity of skeletal muscles known as
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Respiratory muscle
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During inspiration contractions cause the downward movement of a dome-shaped muscle known as the
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Diaphragm
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The relaxation of respiratory muscles compresses the thorax and increase the air pressure in the
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Lungs
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While inspiration is an active process the process of expiration is
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Passive process
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The volume of air that can be forced out of the lungs breathing is controlled by an area of the brain called the respiratory control center which includes part of the medulla oblongata and
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Pons
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the volume of air that can be forced out of the lungs after a forced inspiration is the
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Vital capacity
