Histo cycle 3, del 2

An educational illustration depicting human embryogenesis and histological anatomy, featuring layered tissues and organ development.

Embryology and Histology Quiz

Test your knowledge in embryology and histology with our comprehensive quiz! Designed for students and professionals alike, this quiz covers a wide range of topics, from the development of the blastocyst to the structure of endocrine glands.

Key Features:

31 Questions
Multiple choice and checkbox format
Detailed focus on human development and histological structures

31 Questions8 MinutesCreated by StudyingStar257

During the 2nd week of development:

Embryoblast differentiates into 2 germ layers – epiblast and hypoblast

The definitive yolk sac appears

Bilaminar germ disc appears

Syncytiotrophoblast and the cytotrophoblast have evolved

Auerbachs plexus is localized in:

Muscularis externa

Between the outer longitudinal and inner circular layers of the muscularis in small intestine

Mucosa

Muscularis mucosae

Oral cavity:

Ducts of von ebner glands surround filiform papillae

The hard palate and gingiva are lined with stratified squamous keratinized epithelium

Circumvallate papillae are associated with salivary glands

Each part is lined with keratinizied stratified squamous epithelium

Taste buds contain gustatory cells

Taste buds contain supportive cells

The endocrine glands or structures which accumulate hormones outside of the cell:

Zona fasciculata of adrenal cortex

Pars nervosa of hypophysis

Thyroid

Calcitonin:

Increases the storage of calcium in bones

It works antagonistically to PTH

It works antagonistically to melanin

Reduces the excretion of calcium through the kidneys

Is produced in the pineal gland

Adrenal gland:

Cortex is separated from medulla by connective tissue

Medulla releases and accumulates catecholamines

Medulla releases and accumulates norepinephrine

Zona reticularis of adrenal cortex produces androgens

Contains only medulla in adults

Each layer of adrenal cortex contains steroidogenic cells

Zona reticularis of the cortex is ACTH dependent

Zona fasciulata of the cortex is ACTH dependent

POMC:

Precursor of MSH – melanotropin

Produces by corticotropic cells

Precursor for lipotropin (LPH)

Precursor for ACTH – adrenocorticotropin

Precursor for B-endorphine

Released from adenohypophysis

Released from neurohypophysis

Mesoderm:

Paraxial divides into: dermatome, myotome, sclerotome

Mesenchyme develops from sclerotome

Intermediate divides into: dermatome, myotome, sclerotome

Intraembryonic is located between ectoderm and endoderm

Indicate correct pairs (structure – derivation)

Malleus – 1st pharyngeal arch

Stapes – 2nd pharyngeal arch

Pancreas:

Contains serous cells arranged in acini

Have centroacinar cells which are an extension of the intercalated duct

Contains centroacinar cells localized within exocrine part

Exocrine part is composed of Langerhans islets

Is divided into endocrine and exocrine part

Pancreas:

Is encapsulated within the connective tissue

Contains intercalated ducts

Most of this organ is composed of endocrine part

Delta cells produce somatostatin

Serous acini are exocrine portion of the pancreas, endocrine = Langerhans islets

Perisinusoidal space of Disse:

Is filled with plasma

Consists of reticular fibers

Location between hepatocytes, endothelial cells and sinusoids

Contains Ito’s cells

Microvilli of hepatocytes are present here

Surrounds central vein in liver

Penetration of the zona pellucida by spermatozoa:

Is the next step after dispersing of the follicular cells

Is the process of dispersing the follicular cells

Is a consequence of releasing the acrosome enzymes of spermatozoa

Is also called a decidua reaction

Fusion of the oocyte an sperm cell membranes follows the penetration of ZP

Epiblast:

Is composed of cells adjacent to amniotic cavity

Together with the hypoblast creates the bilaminar germ disc

Cells separated from epiblast are amniogenic cells

Bilaminar germ disc:

Develops during the 2nd week of embryogenesis

Is composed of epiblast and hypoblast

Is differentiated from the trophoblast

Produces a hCG

Serosa of organs of digestive system:

Ultimobranchial body – select true:

Arise from 3rd pharyngeal pouch

Arise from 4th pharyngeal pouch

Arise from 5th pharyngeal pouch

Differentiate into medulla of adrenal gland

Give rise to C-cells of thyroid gland

Pancreas – exocrine part:

Has endodermal origin

Has ectodermal origin

Develops from epithelium of jejunum

Develops from epithelium of duodenum

Ventral pancreatic bud is smaller than dorsal pancreatic bud

Find true sentences – endocrine system:

Herring bodies store vasopressin and oxytocin

Type A cells of Langerhans islets produce glucagon

Pars intermedia of hypophysis contains basophilic cells

Pars intermedia of hypophysis contains acidophilic cells

Pick up the true – development of endocrine system:

Fetal cortex (primitive cortex) of adrenal gland partly undergo involution (degeneration)

Posterior part of the Rathkes pouch develop into pars intermedia

Cortex of adrenal gland develop from mesothelium

The infundibulum gives rise to median eminence, neural stalk and pars nervosa

Definitive/permanent cortex of adrenal gland undergo involution

Cortex of adrenal gland develop from mesoderm

Secretory end pieces of major salivary glands are releasing the content first into:

Intercalated ducts

Interlobular ducts

Excretory ducts

Striated ducts

Development of the three germ layers:

Is called gastrulation

Endoderm derives from extraembryonic mesoderm

Intraembryonic mesoderm derives from epiblast

Cells of epiblast migrate towards primitive streak

Development of endoderm is first than invagination of epiblast layer

Endoderm derives from epiblast

Cells of epiblast form ectoderm

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Histo cycle 3, del 2

Embryology and Histology Quiz

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