Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Introduction to Water

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Water

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Multiple Choice

Water is a polar molecule. What does this statement mean?

That water molecules are linear, like a pole

That water is one of the many hydrophobic molecules

That the atoms in water have equal electronegativities

That atoms in the molecule have partial charges as a result of unequal sharing of electrons in a covalent bond

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Verified step by step guidance

Understand the concept of polarity in molecules: Polarity refers to the distribution of electrical charge over the atoms joined by the bond. In polar molecules, there is an unequal sharing of electrons between atoms.

Recognize the structure of a water molecule: Water (H₂O) consists of two hydrogen atoms covalently bonded to one oxygen atom. The oxygen atom is more electronegative than the hydrogen atoms.

Explain electronegativity: Electronegativity is the ability of an atom to attract electrons towards itself. Oxygen has a higher electronegativity compared to hydrogen, which leads to unequal sharing of electrons.

Describe partial charges: Due to the unequal sharing of electrons, the oxygen atom in a water molecule carries a partial negative charge (δ-) and the hydrogen atoms carry partial positive charges (δ+).

Conclude the meaning of water being polar: The partial charges create a dipole moment, making water a polar molecule. This polarity is responsible for many of water's unique properties, such as its ability to dissolve other polar substances.