Multiple Choice
Plasma accounts for _____% of all blood, and water accounts for _____% of plasma.
17. The Blood
Introduction To Blood
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Which of the following is a characteristic of a mature erythrocyte?
A
It is composed mostly of albumin and water.
B
It has a nucleus.
C
It has a biconcave disc shape.
D
It has mitochondria.
Verified step by step guidance1
Understand the structure and function of erythrocytes (red blood cells). Erythrocytes are specialized cells responsible for transporting oxygen and carbon dioxide throughout the body.
Recognize that mature erythrocytes are unique in their structure. They lack a nucleus and organelles, such as mitochondria, which distinguishes them from many other cell types.
Identify the characteristic shape of mature erythrocytes. They have a biconcave disc shape, which increases their surface area for gas exchange and allows them to deform as they pass through narrow capillaries.
Consider the composition of erythrocytes. They are primarily composed of hemoglobin, a protein that binds oxygen, rather than albumin and water.
Conclude that the defining characteristic of mature erythrocytes is their biconcave disc shape, which is crucial for their function in gas exchange.
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