Protruding Papulae on the Surface of Echinoderms Improve Respiratory Efficiency

question 42

Multiple Choice

Protruding papulae on the surface of echinoderms improve respiratory efficiency by ______.

• A)increasing the concentration difference
• B)increasing the surface area for diffusion
• C)decreasing the distance for diffusion
• D)changing the diffusion constant

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Social Conditions

The environmental, cultural and economic factors that influence the lives and opportunities of those within a society.

Life Expectancy

The average period that an individual is expected to live, based on statistical analysis, which can vary by geographical location, era, and other social factors.

Sociology of Medicine

A sub-discipline of sociology that examines the social dimensions of health, illness, and healthcare, including the role of medical institutions and the interactions among patients, healthcare providers, and society.

Life Expectancy

The average number of years that a person is expected to live, based on statistical averages.