Quiz: Histology — AUA MCQ

Sebaceous glands are usually associated with

A Hair follicles . B Keratinocytes . C Melanocytes . D Sweat glands .

Receptors of pain in the skin are

A Merkel cells B Krause corpuscle C Free nerve endings D Meissner corpuscle

The following facts about thick skin are true EXCEPT

A Epidermis is thick (400-1400 .0m) B All layers of keratinocytes are present C Large irregular dermal papillae D Absence of hair follicles E sebaceous giands and errector pilli muscles

Articular cartilage differs from other hyaline cartilage in:

A Lack of blood vessels. B It is mesenchymal in origin. C It contains isogenous groups of chondrocyte D It lacks a perichondrium

Which layer of the epidermis is present only in thick skin?

A Stratum basale B Stratum spinosu C Stratum granulosum D Stratum lucidum

Which cell is found in the dermis?

A Keratinocyte B Melanocyte C Fibroblast D Merkel cell

Satellite cells are responsible for the regeneration of which of the following?

A Skeletal muscles. B Smooth muscles. C Cardiac muscles. D skeletal,cardiac and smooth

Osteoblasts are present in:

A Bone marrow. B Interstitial concentric lamellae C The endosteum. D Articular surfaces.

The type of cartilage present in the intervertebral discs is:

A Hyaline cartilage B Elastic cartilage C Fibrocartilage D Articular cartilage

White (type I) muscle fibers are characterized by the following:

A Fast-twitch leades to temporary contraction over a short period B Small diameter. C decrease Myoglobin and decrease mitochondria. D Pale succinic dehydrogenase reaction.

Which is WRONG about osteo-blasts?

A Arise from osteo-genic cells. B By LM they have central nuclei and many processes. C They form organic components of the matrix D May change to osteo-cytes when trapped inside lacunae

Pericytes are responsible for the regeneration of which of the following?

A Skeletal muscles B Smooth muscles. C Cardiac muscles. D All of the above.

Osteoclasts are present in:

A Bone marrow B Interstitial concentric lamellae. C The Howship’s lacunae. D Articular surfaces

Which layer of the epidermis has cells which have keratohyaline granules/

A Clear layer B Granular cell layer C Horny layer D Basal cell layer

Which of the following is NOT considered an epidermal appendage?

A Sweat gland B Hair C Hypodermis D Nails

The function of Langerhans cells is

A Antibody secrestion. B Melanin storage C Antigen presenting cell D Keratin hyaline granules storage.

The function of Langerhans cells is

A Antibody secrestion. B Melanin storage C Antigen presenting cell D Keratin hyaline granules storage.

The secretory mechanism by which sebum is produced is

A Holocrine B Apocrine C Cytocrine D Merocrin

the perichondrium is usually present in:

A Intervertebral disc B Ear pinna C Articular cartilage . D Symphysis pubis

The structure that surrounds the entire muscle is called:

A Epimysium B Perimysium C Endomysium D Sarcolemma

Triads are usually seen by

A EM, in the skeletal muscles B LM, in the skeletal muscles C LM, in the striated muscles D EM, in the cardiac muscles

Satellite cells are responsible for the regeneration of which of the following?

A Skeletal muscles B smooth muscles C Cardiac muscles D All the above

Which of the following is most accurately describing of the perichondrium?

A yellow elastic connective tissue B Loose areolar connective tissue C Reticular connective tissue D Irregular white fibrous connective tissue

Osteoblasts are present in:

A Loose connective tissue B Interstitial concentric lamellae C The endosteum D Articular surfaces

Starting from outside to the inside; the skin layers are:

A Basale, spinosum, granulosum B Corneum, lucidum, granulosum. C Spinosum, granulosum, basale D Granulosum, basale, spinosum

Concerning bone, all the following are true EXCEPT:

A it is constantly renewed B it is avascular C It is responsive to endocrine and nutritional factors D It may grow by appositional growth

The following statements about osteoblasts are true EXCEPT:

A They are bone forming cells B Present inner to periosteum C By EM they have features of protein forming cells D Change to osteoclasts when trapped inside lacunae

In the skin, mitosis occurs more frequently in:

A Stratum spinosum B Stratum basale C Stratum corneum D Stratum granulosum

Which type of cartilage is found in articular surface of joints

A A. Hyaline cartilage B B. Elastic cartilage C C. Fibro elastic D D. Fibrocartilage

The histological features of cardiac muscle include all of the followings EXCEPT

A A. Cross striations B B. Intercalated disks C C. Gap junctions D D. Peripheral nuclei

The compact bone found in all the following EXCEPT

A A. Diaphysis of long bones B B. Inner tables of flat bones C C. Outer tables of flat bones D D. Middle layer of flat bones

As regard the sebaceous glands which is FALSE

A A. They have a holocrine mode of secretion B B. They are found In thin and thick skin C C. They are lined by stratified epithelium D D. They produce an oily secretion

All the followings are histological characteristic features of the smooth muscle EXCEPT

A A. Present in the wall of blood vessels B B. Single central snake shaped nucleus C C. More actin D D. T-tubules are present

All the followings are histological components of moderator band EXCEPT

A A. Cardiac muscle fibers B B. Purkinje muscle fibers C C. Blood vessels D D. Plasma cells

As regard the chondrocytes which is FALSE

A A. They have many rER cisternae B B. They have large Golgi body C C. They are found In the perichondrium D D. They have irregular outlines

functional unit of myofibril is

A A. Actin B B. Myosin C C. Sarcomere D D. A band

Glycosylation of collagen occurs in which of the following residues?

A A. Hydroxyproline B B. Lysine C C. Proline D D. Hydroxylysine

Which troponin binds to tropomyosin?

A A. Troponin I B B. Troponin M C C. Troponin C D D. Troponin T

Functional unit of myofibril is

A A. Actin B B. Myosin C C. Sarcomere D D. A band

As regard the sebaceous glands which is false

A A. They have a holocrine mode of secretion B B. They are found in thin and thick skin C C. They are lined by stratified epithelium D D. They produce an oily secretions

The spongy bone found in all of the followings EXCEPT

A A. The middle layer of flat bones B B. Ends of long bones (epiphyses) C C. short irregular bones D D. Diaphyses of long bones

All of the followings are histological characteristic features of smooth muscle EXCEPT

A A. Present in the wall of blood vessels B B. Single central snake- shaped nucleus C C. More actin than myosin D D. T-tubules are present

The histological features of compact bone include all of the followings EXCEPT

A A. Haversian canal B B. Volkmann's canals C C. Sharpey's fibers D D. Bone trabeculae

White fibrocartilage is found in

A A. Intervertebral discs B B. Ear pinna C C. Wall of the trachea D D. Wall of the bronchi

The deepest connective tissue of the muscle is

A A. Perimysium B B. Epimysium C C. Fascia D D. Endomysium

Which feature is found only in cardiac muscle

A A. Central nuclei B B. Striated C C. Non-branched D D. Intercalated discs

Smooth muscle contraction isInitiated by binding of calcium to

A A. Actin B B. Calmodulin C C. Desmin D D. Myosin

Which feature differentiates smooth muscles from other muscles

A A. Central nuclei B B. Striated C C. Branched fibers D D. Divide by mitosis

Gap junctions, desmosomes & adherens junctions are found in

A A. Myofilaments B B. Dense bodies C C. Sarcomeres D D. Intercalated discs

Regeneration of the skeletal muscle occurs by

A A. Division of muscle cells intomyoblasts B B. Differentiation of satellite cells C C. Division of myocytes to form new myotubes D D. Hyperplasia of existing muscle fibers

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