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Ch. 1 The Human Body: An Orientation
Marieb - Human Anatomy & Physiology 7th Edition
Marieb, Hoehn7th EditionHuman Anatomy & PhysiologyISBN: 9780805359091Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMarieb, Hoehn 7th EditionCh. 1 The Human Body: An OrientationProblema 10
Capitolo 1, Problema 10

List and describe briefly five external factors that must be present or provided to sustain life.

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Identify that the question asks for five external factors necessary to sustain life, which are environmental conditions or resources organisms depend on to survive.
List the first factor: Oxygen – essential for cellular respiration, allowing cells to produce energy.
List the second factor: Water – vital for biochemical reactions, temperature regulation, and as a solvent for nutrients and waste.
List the third factor: Nutrients – substances like carbohydrates, proteins, fats, vitamins, and minerals that provide energy and building blocks for growth and repair.
List the fourth factor: Temperature – must be within a range suitable for enzymatic and metabolic activities to function properly.
List the fifth factor: Pressure – atmospheric or hydrostatic pressure is necessary for processes like breathing and circulation in many organisms.

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External Factors for Life

External factors are environmental conditions or resources outside an organism that are essential for its survival. These include elements like water, oxygen, and temperature, which must be maintained within certain limits to support life processes.
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03:36
Elements of Life

Water as a Life Sustaining Factor

Water is crucial for life as it acts as a solvent, medium for chemical reactions, and helps regulate temperature. All living organisms depend on water to transport nutrients and remove waste, making it a fundamental external factor.
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01:29
Emergent Properties of Water

Oxygen and Atmospheric Conditions

Oxygen is vital for cellular respiration in most organisms, enabling energy production. Additionally, appropriate atmospheric pressure and temperature ranges are necessary to maintain biochemical stability and support metabolic activities.
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07:50
What Happens to Aerobic Organisms if There's No Oxygen?
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Provide the anatomical term that correctly names each of the following body regions:

a. Arm

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c. Chest

d. Fingers and toes

e. Anterior aspect of the knee

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According to the principle of complementarity, how does anatomy relate to physiology?

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Terms that apply to the backside of the body in the anatomical position include:

a. Ventral; anterior

b. Back; rear

c. Posterior; dorsal

d. Medial; lateral

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