When She Hikes a Distance of 1 Km in a Time

question 54

Multiple Choice

When she hikes a distance of 1 km in a time of one-half hour her average speed is

• A)nearly 1 km/h.
• B)1 km/h.
• C)slightly more than 1 km/h.
• D)twice 1 km/h.

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Definitions:

Expiratory Reserve

The volume of air that can be forcefully exhaled after the end of a normal tidal expiration.

Intercostal Muscles

Muscles located between the ribs that aid in the process of breathing by controlling the expansion and contraction of the chest cavity.

Elevate Ribs

The action of lifting the ribs through muscle contraction, which increases the volume of the thoracic cavity to aid in inhalation.

Emphysema

A long-term, progressive disease of the lungs characterized by a loss of elasticity and enlargement of air spaces, leading to breathing difficulties.