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 Heart2h 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

Covalent Bonds

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Covalent Bonds

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Multiple Choice

If a covalent bond is polar:
a) Electrons are not shared by atoms.
b) Protons are shared by atoms.
c) The bond is not important to living cells.
d) One of the atoms has a partial negative charge.
e) The bond is not a strong bond.

Electrons are not shared by atoms.

Protons are shared by atoms.

The bond is not important to living cells.

One of the atoms has a partial negative charge.

The bond is not a strong bond.

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Verified step by step guidance

Understand the nature of covalent bonds: Covalent bonds involve the sharing of electron pairs between atoms. In a polar covalent bond, the electrons are shared unequally due to differences in electronegativity between the two atoms.

Identify the concept of electronegativity: Electronegativity is the tendency of an atom to attract electrons towards itself. In a polar covalent bond, one atom will have a higher electronegativity than the other, causing an unequal sharing of electrons.

Determine the partial charges: In a polar covalent bond, the atom with the higher electronegativity will attract the shared electrons more strongly, resulting in a partial negative charge (δ-) on that atom. Conversely, the other atom will have a partial positive charge (δ+).

Evaluate the importance of polar covalent bonds: Polar covalent bonds are crucial in biological systems as they contribute to the formation of molecules like water, which is essential for life. They also play a role in the structure and function of proteins and nucleic acids.

Clarify the strength of polar covalent bonds: While polar covalent bonds are generally stronger than hydrogen bonds, they are not as strong as ionic bonds. However, they are significant in maintaining the structure and function of biological molecules.