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Chapter 31: Problem 37

Serum is used to diagnose and monitor diseases, and it is also used to classify blood types. Which of the following statements best describes serum? a. It is a liquid consisting of 90% water and has coagulation factors. b. It is plasma without the coagulation factors. c. Serum is only made of albumin. d. Serum is the same substance as interstitial fluid.

Short Answer

Expert verified
Option b: It is plasma without the coagulation factors.

Step by step solution

01

- Identify Key Characteristics of Serum

Understand that serum is the component of blood that is used for medical diagnostics and classifying blood types. It is derived from plasma but is distinct in its composition.
02

- Analyze Option a

Option a states that serum is a liquid consisting of 90% water and has coagulation factors. This statement describes plasma rather than serum, which lacks coagulation factors.
03

- Analyze Option b

Option b mentions that serum is plasma without the coagulation factors. This is correct because serum is obtained after blood has clotted and the coagulation factors have been removed.
04

- Analyze Option c

Option c asserts that serum is only made of albumin. This is incorrect as serum contains various proteins and molecules, not just albumin.
05

- Analyze Option d

Option d claims that serum is the same substance as interstitial fluid. This is incorrect as interstitial fluid is the fluid between cells, not the same as serum.
06

- Conclusion

Based on the analysis, the statement that best describes serum is option b, as serum is plasma without the coagulation factors.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

plasma
Plasma is a crucial component of blood. It is a yellowish liquid that makes up about 55% of your total blood volume. Plasma consists of various elements that play essential roles in bodily functions.

Key components of plasma include:
  • Water: Plasma is about 90% water, which helps transport nutrients, hormones, and waste products throughout the body.
  • Proteins: Major proteins found in plasma include albumin, fibrinogen, and globulins. These proteins help with blood clotting, immune responses, and maintaining osmotic balance.
  • Electrolytes: Sodium, potassium, calcium, and other electrolytes in plasma are crucial for maintaining fluid balance and supporting nerve and muscle function.
  • Waste Products: Plasma carries waste products like carbon dioxide, urea, and lactic acid to be removed from the body.
It's essential to understand that plasma contains coagulation factors, which are necessary for blood clotting. When blood is allowed to clot, these coagulation factors are used up, leaving behind serum.
coagulation factors
Coagulation factors are proteins in the blood that help manage the process of blood clotting (coagulation). They work together in a complex series of steps to form a stable blood clot.

Key Points about coagulation factors:
  • Activation: Coagulation factors are usually inactive in the bloodstream but become activated when there is an injury that causes bleeding.
  • Cascade Process: The process involves a cascade of events where one activated factor triggers the activation of the next, eventually leading to the formation of a blood clot.
  • Platelets: Platelets work alongside coagulation factors by clumping together to form a temporary plug at the site of injury.
After blood clots, the remaining liquid is called serum, which does not contain coagulation factors because they have been consumed in the clotting process. Therefore, understanding coagulation is vital in differentiating between plasma and serum.
blood types
Blood types are determined by the presence or absence of specific antigens on the surface of red blood cells. They are classified into different groups based on these antigens.

Main Blood Groups:
  • ABO System: This system groups blood into four types -- A, B, AB, and O. Type A has A antigens, Type B has B antigens, AB has both, and O has neither.
  • Rh Factor: Besides the ABO system, the presence or absence of the Rh factor (another antigen) further classifies blood as positive (present) or negative (absent).
Blood typing is crucial in medical diagnostics for several reasons:
  • Transfusions: To avoid adverse reactions, it is important to match blood types during transfusions.
  • Pregnancy: Knowing Rh factors can help manage Rh incompatibility between mother and child.
  • Disease Monitoring: Certain blood types are associated with increased risks for specific conditions, making blood type information valuable in disease monitoring and diagnostics.
Serum, which is derived from blood, is utilized in these diagnostic procedures due to its ability to reveal vital information about an individual鈥檚 health and blood characteristics.

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Most popular questions from this chapter

Many platelets converge and stick together at a wound site, eventually forming a platelet plug, also called a fibrin clot. Platelets continue to arrive at the wound site until the plug is completely formed. Describe the feedback mechanisms taking place and predict what would likely happen if part of the platelet plug broke away before the wound was healed. a. A positive feedback loop, which would restart if part of the platelet plug broke away, calling more platelets to the site to repair the broken plug. b. A negative feedback loop, which would restart if part of the platelet plug broke away, calling more platelets to the site to repair the broken plug. c. A positive feedback loop, which would not restart if part of the platelet plug broke away. d. A negative feedback loop, which would not restart if part of the platelet plug broke away

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Which of the following statements about circulatory systems is false? a. In closed circulatory systems, blood flows through vessels that are separate from the interstitial fluid of the body. b. The earthworm has a closed circulatory system. c. In an open circulatory system, hemolymph empties into the body cavity. d. Lobsters are organisms that have closed circulatory systems.

Insects have open circulatory systems in which blood, or hemolymph, circulates through the body cavity rather than through closed blood vessels. Birds, like other vertebrates, have closed circulatory systems in which blood remains within arteries, veins, and capillaries as it circulates. Based on their difference in circulatory system, which of the following statements best describes an organism that would be favored by selection during a food shortage? a. Insects would be favored because an open circulatory system requires less energy. b. Insects would be favored because an open circulatory system stores energy. c. Birds would be favored because a closed circulatory system loses less energy to heat. d. Birds would be favored because a closed circulatory system is more efficient at delivering nutrients.

A simple organism such as a jellyfish uses _____ to exchange gases and nutrients with their surrounding environment. a. blood b. diffusion c. atria d. blood vessels
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