Bone Cells and Extracellular Fibers Quiz

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What is the approximate size of a promyelocyte?

Approximately the same size as a myeloblast

15-20 μm in diameter

25 μm in diameter (correct)

Slightly smaller than a myelocyte

Which of the following is a key characteristic of a metamyelocyte?

Capable of mitosis

Nucleus is round or oval with clumped chromatin

Presence of azurophilic granules

Incapable of mitosis (correct)

What is the main difference between a metamyelocyte and a stab cell?

Size

Presence of specific granules

Shape of the nucleus (correct)

Basophilic nature of the cytoplasm

Where does lymphopoiesis primarily occur?

Lymphoid tissues and organs Signup and view all the answers

How do myelocytes differ from promyelocytes?

Myelocytes have more abundant but less basophilic cytoplasm Signup and view all the answers

What is the key difference between the specific granules of neutrophils/eosinophils and basophils?

Staining properties Signup and view all the answers

Which type of collagen fibers are mostly found in extracellular fibers?

Type 1 collagen fibers Signup and view all the answers

What happens if there is a deficiency in calcium and phosphorus in bones?

Leads to poor mineralization and brittle bones Signup and view all the answers

What is the primary role of osteoblasts in bone development?

Secrete bone matrix Signup and view all the answers

Where are osteoclasts usually found when resorption takes place?

In the Howship's lacunae Signup and view all the answers

What condition results from vitamin D deficiency in adults?

Osteomalacia Signup and view all the answers

How does vitamin A deficiency impact bone health?

Adversely affects osteoblasts and osteoclasts Signup and view all the answers

Which of the following is NOT a type of hemopoietic tissue?

Connective tissue Signup and view all the answers

During prenatal life, which tissue produces blood cells LAST before bone marrow takes over?

Spleen Signup and view all the answers

Which of the following is a site of antibody production?

Lymph nodes Signup and view all the answers

What is the term used to describe the continuous process of producing new blood cells?

Hematopoiesis Signup and view all the answers

Which of the following cell types is NOT involved in the neutrophilic line of blood cell formation?

Monoblast Signup and view all the answers

After birth, which tissue becomes the primary site of blood formation, except for lymphopoiesis?

Bone marrow Signup and view all the answers

What is the function of the tunica adventitia in arteries?

It is the layer that contains the vasa vasorum, which supply the artery with oxygen and nutrients. Signup and view all the answers

What is the key difference between the tunica media of small arteries (arterioles) and medium-sized arteries?

Arterioles have a single layer of endothelial cells in the tunica intima, while medium-sized arteries have a more complex tunica intima. Signup and view all the answers

What is the primary function of the muscular (medium-sized) arteries?

To distribute blood to the different parts of the body. Signup and view all the answers

What is the primary role of the vasa vasorum in large blood vessels?

To supply oxygen and nutrients to the tissue of the blood vessel wall. Signup and view all the answers

What is the key feature of the tunica media in medium-sized arteries?

It can have up to 40 layers of circularly arranged smooth muscle fibers. Signup and view all the answers

What is the primary role of the endothelium in the tunica intima of arteries?

To serve as a barrier between the blood and the underlying tissue of the arterial wall. Signup and view all the answers

Which of the following is a characteristic of continuous capillaries?

Their endothelial cells are ovoid and elongated with finely granular cytoplasm. Signup and view all the answers

What is the primary function of contractile cells in capillaries?

All of the above Signup and view all the answers

Which type of capillaries are found in the renal glomerulus?

Fenestrated capillaries Signup and view all the answers

What is the primary characteristic of sinusoidal capillaries?

They have true discontinuities in their endothelium, allowing free passage of blood. Signup and view all the answers

Which layer of an artery or vein contains Weibel-Palade bodies, which are storage sites for von Willebrand factor?

Tunica intima Signup and view all the answers

What is the arrangement of smooth muscle fibers in the tunica media of arteries and veins?

Concentrically arranged Signup and view all the answers