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multiple choice questions from test

d

The most abundant gas in Earth's atmosphere is
a. oxygen
b. water vapor
c. argon
d. nitrogen
e. carbon dioxide

a

The oxygen content of air is approximately
a. 21 percent
b. 78 percent
c. 0.04 percent
d. 0.96 percent
e. 100 percent

a

The concentration of nitrogen in the Earth's atmosphere is approximately
a. 78 percent
b. 66 percent
c. 50 percent
d. 33 percent
e. 20 percent

b

The concentration of carbon dioxide in the Earth's atmosphere is
a. 0.004 percent
b. 0.04 percent
c. 0.4 percent
d. 4.0 percent
e. 40 percent

d

Gas exchange across a membrane requires
a. moisture
b. transport proteins
c. pressure gradients
d. moisture and pressure gradients
e. moisture, pressure gradients, and transport proteins

d

The movement of both oxygen and carbon dioxide in the body is accomplished by
a. exocytosis and endocytosis
b. bulk flow
c. osmosis
d. diffusion
e. facilitated diffusion

d

Iron containing respiratory pigments include
a. hemerythrin
b. hemocyanin
c. hemoglobin
d. hemerythrin and hemoglobin
e. hemerythrin, hemoglobin, and hemocyanin

d

An oxygen storage pigment that is abundant in muscle cells is
a. hemocyanin
b. hemoglobin
c. hemerythrin
d. myoglobin
e. none of the choices

e

For the surface of an animal to function in the integumentary exchange of gases it must
a. be thin and soft
b. have a high number of blood vessels
c. have mucus or moist covering
d. have a high surface to volume ratio
e. all of the choices

b

Adult insects exchange respiratory gases primarily by means of
a. spiracles
b. tracheae
c. lungs
d. gills
e. body surface

d

Which animal group does not have respiratory pigments?
a. annelids
b. crustaceans
c. mollusks
d. insects
e. spiders

a

Spiders use which respiratory pigment?
a. hemocyanin
b. hemoglobin
c. hemerythrin
d. myoglobin
e. none of the choices

d

External gills are characteristic of
a. larval insects
b. larval amphibians
c. most fish
d. larval insects and larval amphibians
e. all of the choices

a

Blood and water flowing in opposite directions, in conjunction with respiratory systems, is a mechanism that explains how
a. Oxygen uptake by blood capillaries in fish gills occurs.
b. Ventilation occurs.
c. Sounds originating in the vocal cords of the larynx are formed.
d. Intrapleural pressure is established.
e. All of the choices.

b

The group of animals with the most efficient respiratory system is the
a. amphibians
b. birds
c. mammals
d. reptiles
e. fish

d

In what vertebrate group do you find some adults with only integumentary gas exchange?
a. fish
b. frogs
c. lizards
d. salamanders
e. snakes

a

Which group of animals relies on both lungs and integumentary gas exchange?
a. amphibians
b. birds
c. mammals
d. reptiles
e. none of the choices

c

What is the proper sequence in the flow of air in mammals?
a. nasal cavities, larynx, pharynx, bronchi, trachea
b. nasal cavities, pharynx, bronchi, larynx, trachea
c. nasal cavities, pharynx, larynx, trachea, bronchi
d. nasal cavities, larynx, pharynx, trachea, bronchi
e. nasal cavities, bronchi, larynx, trachea, pharynx

c

The last mammalian structure that air moves through before the alveoli is the
a. larynx
b. glottis
c. bronchioles
d. trachea
e. pharynx

a

When humans breathe using only the mouth, which of the following is most diminished?
a. filtering
b. warming
c. moisturizing
d. texturizing
e. vocalizing

c

Food and drink are prevented from entering the respiratory passageways during swallowing by means of the
a. glottis
b. pharynx
c. epiglottis
d. larynx
e. trachea

c

When you swallow, the epiglottis covers the opening to the
a. pharynx
b. esophagus
c. larynx
d. bronchus
e. alveoli

d

The human vocal cords are located in the
a. glottis
b. pharynx
c. trachea
d. larynx
e. bronchus

b

Actual exchange of gases in the lungs occurs in the
a. bronchi
b. alveoli
c. bronchioles
d. tracheas
e. glottis

e

Which of the following is NOT found in lung tissue?
a. blood capillaries
b. alveolar sacs
c. interstitial fluid
d. connective tissue
e. muscle

a

What smooth muscle can be controlled voluntarily?
a. diaphragm
b. intercostals
c. cardiac
d. both diaphragm and intercostals
e. all of the choices

a

Oxygen moves from alveoli to the bloodstream
a. because the concentration of oxygen is greater in the alveoli than in the blood
b. mainly due to the activity of carbonic anhydrase in the red blood cells
c. by using the assistance of carbaminohemoglobin
d. through active transport
e. all of the choices

d

Hemoglobin
a. tends to give up oxygen in regions where partial pressure of oxygen exceeds that in the lungs
b. tends to hold onto oxygen when the pH of the blood drops
c. tends to release oxygen where the temperature is lower
d. releases oxygen more readily in highly active tissues
e. all of the choices

d

Which statement is NOT true?
a. Carbon dioxide is more soluble in water than is oxygen.
b. Carbon dioxide diffuses more rapidly across the respiratory surface than does oxygen.
c. The major muscle involved in breathing is the diaphragm.
d. Oxygen is transported primarily by blood plasma.
e. Carbon dioxide is transported by the blood plasma.

d

Most of the carbon dioxide produced by the body is transported to the lungs in
a. a gaseous form
b. blood plasma
c. potassium carbonate ions
d. bicarbonate ions
e. carbonic acid

a

Which gas binds to hemoglobin more strongly than oxygen?
a. carbon monoxide
b. carbon dioxide
c. nitrogen
d. both carbon dioxide and carbon monoxide
e. all of the choices

b

During inhalation,
a. The pressure in the thoracic cavity is greater than the pressure within the lungs.
b. The pressure in the thoracic cavity is less than the pressure within the lungs.
c. The diaphragm moves upward and becomes more curved.
d. The chest cavity volume decreases.
e. All of the choices.

c

Which of the following statements is false?
a. During inhalation, the chest cavity expands.
b. Inhalation is powered in part by the diaphragm.
c. Muscles in the walls of the lungs aid in enlarging the lung volume.
d. During exhalation, the diaphragm moves upward.
e. The respiratory system consists of four distinct actions.

e

The pacemaker for inhalation is located in the
a. alveoli
b. bronchi
c. diaphragm
d. hypothalamus
e. medulla oblongata

b

The hormone that stimulates the bone marrow to produce more red blood cells is
a. oxytocin
b. erythropoietin
c. growth hormone
d. estrogen
e. adrenalin

c

Increase of what gas in the interstitial fluid causes problems for humans who dive below 45 meters?
a. carbon dioxide
b. argon
c. nitrogen
d. oxygen
e. both carbon dioxide and oxygen

e

What oxygen carrier(s) is/are higher in deep diving marine mammals?
a. hemocyanin
b. hemoglobin
c. myoglobin
d. both hemocyanin and myoglobin
e. both hemoglobin and myoglobin

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