Question

Diameter of an \(\mathrm{RBC}\) is (a) \(7 \mu \mathrm{m}\) (b) \(700 \mathrm{~mm}\) (c) \(6 \mu \mathrm{m}\) (d) \(6000 \mathrm{~mm}\)

Short answer

The correct diameter of an RBC is (a) \(7 \mu \mathrm{m}\)

Step-by-step solution

Understand the question

The question is asking for the Diameter of a RBC(Red Blood Cell).

Recall the biology knowledge of the size range of a RBC

The diameter of a typical human red blood cell is 6–8 micrometers. One micrometer (µm) equals 0.001 millimeters (mm).

Choose the correct answer

Looking at the provided options, (a) \(7 \mu \mathrm{m}\) falls into the size range of a typical RBC and is therefore the correct answer.

Key concepts

Red Blood Cell size

The size of Red Blood Cells (RBCs), or erythrocytes, is an essential parameter in the realm of human biology. These vital cells circulate in our bloodstream and are responsible for carrying oxygen to various parts of the body. A typical red blood cell has a biconcave shape that optimizes its surface area for the exchange of oxygen and carbon dioxide. The average diameter of an RBC is between 6 and 8 micrometers (µm).

When we discuss the size of a cell, it's important to understand that micrometers, abbreviated as µm, are measurements of length that are situated within the metric system. To put it into perspective, 1 µm is equivalent to one-millionth of a meter or 0.001 millimeters (mm). This scale is so minute that it's akin to comparing the size of a soccer ball to that of the earth. Knowing this helps us appreciate the micro scale at which blood cells function, seamlessly passing through the tiny capillaries of the human circulatory system.

Human Biology

Human biology is an interdisciplinary area of study that encompasses features of anatomy, physiology, genetics, and biochemistry to understand the intricacies of human life. Within this broad field, one learns about the various cellular components that make up the human body. One such component is the Red Blood Cell (RBC), a minuscule yet mighty cell that travels through our extensive vascular network.

Understanding RBCs is vital because any variance in their size, shape, or number can indicate a spectrum of medical conditions and diseases. For instance, a condition called microcytosis manifests when red blood cells are smaller than their average size, often signalling iron deficiency anemia. In contrast, macrocytosis involves abnormally large RBCs and could point towards nutritional deficiencies, like a lack of vitamin B12 or folate. Thus, the study of RBC size is not just about numbers; it's about piecing together the clues to a person's wellbeing.

NEET Preparation

NEET, or National Eligibility cum Entrance Test, is a preeminent entrance examination for students in India aspiring to pursue any graduate medical course. Preparation for NEET requires a profound understanding of concepts across physics, chemistry, and biology, with human biology forming a significant portion of the biology syllabus.

While preparing for NEET, students must focus on mastering concepts like the RBC size, which is frequently tested due to its importance in human physiology. An approach often recommended is active recall and spaced repetition – tactics known to enhance memory retention. Students should integrate practice questions into their study sessions, as these can sharpen one's ability to recall information rapidly and accurately. Indeed, questions like determining the diameter of an RBC typify the sort of direct, concept-based queries that appear in NEET, rendering it essential for students to be able to swiftly navigate their biological knowledge to succeed.