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

Atoms- Smallest Unit of Matter

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Atoms- Smallest Unit of Matter

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Multiple Choice

Which of the following is true about electron energy shells?
a) They represent regions around the nucleus in which the electrons orbit.
b) The shells closest to the nucleus contain electrons with higher energy.
c) They contain electrons of the same energy.
d) a and b only.
e) a and c only.

They represent regions around the nucleus in which the electrons orbit.

The shells closest to the nucleus contain electrons with higher energy.

They contain electrons of the same energy.

a and b only.

a and c only.

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Verified step by step guidance

Understand the concept of electron energy shells: Electron energy shells, also known as electron orbitals, are regions around the nucleus of an atom where electrons are likely to be found. These shells are organized in layers, with each shell having a specific energy level.

Analyze the statement 'They represent regions around the nucleus in which the electrons orbit': This statement is true. Electrons are found in orbitals around the nucleus, and these orbitals are organized into shells.

Evaluate the statement 'The shells closest to the nucleus contain electrons with higher energy': This statement is false. Electrons in shells closer to the nucleus actually have lower energy compared to those in shells further away.

Consider the statement 'They contain electrons of the same energy': This statement is false. Electrons within the same shell have similar energy levels, but different shells have different energy levels.

Determine which options are correct based on the analysis: Option 'a' is correct, as it accurately describes electron energy shells. Option 'c' is incorrect, so 'a and c only' is not valid. Therefore, the correct answer is 'a and b only', as 'b' is incorrect.