Chapter 23 Homework: Respiratory System

This structure prevents food or water from entering the trachea. Select one: a. Arytenoid cartilage b. Epiglottis c. Nasopharynx d. Thyroid cartilage e. Paranasal sinus

B. Epiglottis

Which is the dominant method of carbon dioxide transport? Select one: a. Bound to hemoglobin b. Bound to oxygen c. Dissolved in plasma as a gas d. Dissolved in plasma as bicarbonate ions e. Diffusion

D. dissolved in plasma as bicarbonate ions

Where is the rhythmicity center for respiration? Select one: a. in the medulla b. in the pons c. in the cerebrum d. in the hypothalamus e. in the cerebellum

a. in the medulla

This is the sum of the residual and the expiratory reserve volume. Select one: a. Total lung capacity b. Functional residual capacity c. Inspiratory capacity d. Vital capacity e. Minimal volume

b. Functional residual capacity

This is direction of diffusion of gases at capillaries near systemic cells. Select one: a. Oxygen into blood , Carbon dioxide into blood b. Oxygen out of blood , Carbon dioxide into blood c. Oxygen into blood , Carbon dioxide out of blood d. Oxygen out of blood , Carbon dioxide out of blood

b. Oxygen out of blood , Carbon dioxide into blood

Pitch is controlled by Select one: a. Vibration of the vocal chords b. Tension of the vocal chords c. Layers of cartilage in the vocal chords d. Arrangement of the vocal chords e. None of these choices

b. Tension of the vocal chords

This is a spasmodic contraction of the muscles of exhalation that forcefully expels air through the nose and mouth: Select one: a. sobbing b. sneezing c. coughing d. sighing e. Valsalva maneuver

b. sneezing

The nose connects with the pharynx through the Select one: a. Septal cartilage b. External nares c. Choanae d. Uvula e. Nasal meatuses

c. Choanae

When blood pH drops then the amount of oxyhemoglobin _______ and oxygen delivery to the tissue cells ________________. Select one: a. Increases, increases b. Increases, decreases c. Decreases, increases d. Decreases, decreases e. Does not change, does not change

c. Decreases, increases

This means the lungs and the chest wall expand easily. Select one: a. High surface tension b. Low surface tension c. High compliance d. Low compliance e. None of these choices

c. High compliance

Which of the below tissues maintains open airways in the lower respiratory system? Select one: a. stratified squamous epithelium with keratin b. ciliated pseudostratified columnar epithelium with goblet cells c. hyaline cartilage d. mucus membrane e. bone

c. hyaline cartilage

Which of the below tissues forms the exchange surfaces of the alveolus? Select one: a. stratified squamous epithelium b. ciliated pseudostratified columnar epithelium with goblet cells c. simple squamous epithelium d. hyaline cartilage e. columnar connective tissue with goblet cells

c. simple squamous epithelium

This is the primary gas exchange site. Select one: a. Trachea b. Bronchiole c. Nasal sinuses d. Alveolus e. Bronchus

d. Alveolus

This is a spasmodic contraction of the diaphragm followed by spasmodic closure of the rima glottidis, which produces a sharp sound on inhalation: Select one: a. sneezing b. coughing c. laughing d. hiccupping e. Valsalva maneuver

d. hiccupping

The conducting airways with the air that does not undergo respiratory exchange are known as the Select one: a. Inspiratory volume b. Expiratory reserve volume c. Minimal volume d. Residual volume e. Respiratory dead space

e. Respiratory dead space

With which body system does the respiratory system work to regulate the pH of body fluids? Select one: a. muscular b. digestive c. nervous d. endocrine e. urinary

e. urinary