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 Chemical Bonding

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following statements is true of LDL and HDL?

Both LDL and HDL are types of proteins that transport oxygen in the blood.

LDL is known as 'good' cholesterol, while HDL is known as 'bad' cholesterol.

LDL and HDL are both types of white blood cells involved in immune response.

HDL helps remove cholesterol from the bloodstream, while LDL can lead to plaque buildup in arteries.

Previous problemNext problem

Verified step by step guidance

Begin by understanding the roles of LDL and HDL in the body. LDL stands for Low-Density Lipoprotein, and HDL stands for High-Density Lipoprotein. Both are types of lipoproteins, not proteins that transport oxygen or white blood cells.

Recognize that LDL is often referred to as 'bad' cholesterol because it can deposit cholesterol in the walls of arteries, leading to plaque buildup and potentially causing atherosclerosis.

Understand that HDL is known as 'good' cholesterol because it helps transport cholesterol away from the arteries and back to the liver, where it can be processed and removed from the body.

Evaluate the statements given in the problem. The first statement incorrectly identifies LDL and HDL as proteins that transport oxygen, which is not their function. The second statement reverses the roles of LDL and HDL, incorrectly labeling LDL as 'good' and HDL as 'bad'. The third statement incorrectly categorizes them as white blood cells.

Conclude that the correct statement is: HDL helps remove cholesterol from the bloodstream, while LDL can lead to plaque buildup in arteries. This accurately describes the functions and health implications of LDL and HDL.