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

17. The Blood

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Problem 3

Textbook Question

Blood temperature is approximately _, and blood pH averages _.
(a) 36 °C, 7.0
(b) 39 °C, 7.8
(c) 38 °C, 7.4
(d) 37 °C, 7.0

Verified step by step guidance

Step 1: Understand the physiological context of the question. Blood temperature and pH are tightly regulated to maintain homeostasis. Blood temperature is typically close to the body's core temperature, and blood pH is slightly alkaline to support cellular functions.

Step 2: Recall the normal range for human body temperature. The average core body temperature is approximately 37 °C, which is also the typical blood temperature.

Step 3: Recall the normal range for blood pH. Blood pH is maintained within a narrow range of 7.35 to 7.45, with an average of 7.4, which is slightly alkaline.

Step 4: Compare the options provided in the question. Identify the choice that matches the physiological norms for both blood temperature and blood pH.

Step 5: Select the correct answer based on the physiological norms: 37 °C for blood temperature and 7.4 for blood pH.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Normal Blood Temperature

The normal temperature of human blood is typically around 37 °C (98.6 °F). This temperature is crucial for maintaining optimal physiological functions, including enzyme activity and metabolic processes. Deviations from this temperature can indicate underlying health issues or physiological stress.

Blood pH Levels

Blood pH is a measure of acidity or alkalinity, with normal values ranging from 7.35 to 7.45. A pH of 7.4 is considered neutral and is essential for proper cellular function. Abnormal pH levels can lead to conditions such as acidosis or alkalosis, affecting overall health.

Homeostasis

Homeostasis refers to the body's ability to maintain stable internal conditions despite external changes. This includes regulating temperature and pH levels, which are vital for physiological balance. Disruptions in homeostasis can lead to significant health problems, highlighting the importance of these parameters.