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IBS Set 6 Quiz - Embryology - Semester 2 Recap.

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Question 1 of 32

1

What is the following structure called?

Select one of the following:

Blastocyst
Morula
Zygote

Explanation

Question 2 of 32

1

The primitive streak is indicative of gastrulation occuring.

Select one of the following:

True
False

Explanation

Question 3 of 32

1

The ectoderm gives rise to...

Select one or more of the following:

Enamel
Epidermis
Nervous system
Cardiovascular system
Respiratory system
Gastrointestinal system

Explanation

Question 4 of 32

1

The mesoderm gives rise to...

Select one or more of the following:

Cardiovascular system
Muscle
Connective tissue
Epidermis
Urinary system
Gastrointestinal tract

Explanation

Question 5 of 32

1

The endoderm gives rise to...

Select one or more of the following:

Respiratory system
Gastrointestinal tract
Urinary system
Cardiovascular system
Epidermis
Nervous system

Explanation

Question 6 of 32

1

The notochord forms from the notochordal plate in a cranial to caudal sequence.

Select one of the following:

True
False

Explanation

Question 7 of 32

1

What substances does the primitive node release?

Select one or more of the following:

Brain derived neurotrophic factor
NODAL
BMP4
Noggin
CSPG's

Explanation

Question 8 of 32

1

The function of NODAL is...

Select one of the following:

Maintains the primitive streak
Stimulates skin formation from the ectoderm
Stimulates cranial structure and nervous system development

Explanation

Question 9 of 32

1

The function of BMP4 is...

Select one of the following:

Maintains the primitive streak
Stimulates skin formation from the ectoderm
Stimulates cranial structure and nervous system development

Explanation

Question 10 of 32

1

The function of Noggin is...

Select one of the following:

Maintains the primitive streak
Stimulates skin formation from the ectoderm
Stimulates cranial structure and nervous system development

Explanation

Question 11 of 32

1

Neurulation is folding of the neural plate which continues until formation of a neural tube. The closure disconnects the neural crest from the ectoderm, also forming neural crest cells.

Select one of the following:

True
False

Explanation

Question 12 of 32

1

The notochord releases BMP that patterns the ventral side of the neural tube which gives the precursor to the motor neurones of the ventral spinal cord

Select one of the following:

True
False

Explanation

Question 13 of 32

1

Neural crest cells are formed when the neural tube closes and detaches from the ectoderm. Give some examples of where they may migrate and what structures develop.

Select one or more of the following:

Ectoderm - melanocytes
Mesoderm - ganglia, bones of the face and skull
Endoderm - urinary system

Explanation

Question 14 of 32

1

Spina Bifida is caused by failure of the neural tube to close.

Select one of the following:

True
False

Explanation

Question 15 of 32

1

NODAL helps to establish internal asymmetry.

Select one of the following:

True
False

Explanation

Question 16 of 32

1

Mutations in SHH leads to lack of bilateral symmetry and development of conditions like cyclopsia.

Select one of the following:

True
False

Explanation

Question 17 of 32

1

Hox genes control body segmentation; essentially determining what section of the body will become what particular limb etc.

Select one of the following:

True
False

Explanation

Question 18 of 32

1

The visceral layer of the lateral plate mesoderm gives rise to what structure?

Select one of the following:

GI tract
Muscle
Heart
Lungs

Explanation

Question 19 of 32

1

The parietal layer of the lateral plate mesoderm gives rise to what structures?

Select one or more of the following:

Bones of limbs
Connective tissue of limbs
Urogenital system
Heart

Explanation

Question 20 of 32

1

The intermediate mesoderm gives rise to what structure?

Select one of the following:

Urogenital system
Respiratory system
Connective tissue of limbs
GI tract

Explanation

Question 21 of 32

1

The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the dermatome become?

Select one of the following:

Dermis
Muscle
Tendon
Cartilage
Bone

Explanation

Question 22 of 32

1

The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the myotome become?

Select one of the following:

Dermis
Muscle
Tendon
Cartilage
Bone

Explanation

Question 23 of 32

1

The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the sclerotome become?

Select one or more of the following:

Dermis
Muscle
Tendon
Cartilage
Bone

Explanation

Question 24 of 32

1

What structures may the pharyngeal pouches give rise to?

Select one or more of the following:

Palatine tonsils
Parathyroid gland
Thymus gland
Thyroid gland
Cricoid cartilage

Explanation

Question 25 of 32

1

Neural crest cells migrate to the pharyngeal arches. Failure of migration can lead to conditions such as spina bifida.

Select one of the following:

True
False

Explanation

Question 26 of 32

1

What muscular and skeletal structures arise from the 1st pharyngeal arch?

Select one or more of the following:

Mandible
Muscles of mastication
Muscles of facial expression
Styloid process

Explanation

Question 27 of 32

1

What muscular and skeletal structures arise from the 2nd pharyngeal arch?

Select one or more of the following:

Mandible
Styloid process
Muscles of mastication
Muscles of facial expression

Explanation

Question 28 of 32

1

What muscular and skeletal structures arise from the 3rd pharyngeal arch?

Select one or more of the following:

Stylopharyngeus
Hyoid
Styloid process
Thyroid cartilage

Explanation

Question 29 of 32

1

What muscular and skeletal structures arise from the 4th pharyngeal arch?

Select one or more of the following:

Mandible
Pharyngeal constrictors
Thyroid cartilage
Muscles of facial expression

Explanation

Question 30 of 32

1

What muscular and skeletal structures arise from the 6th pharyngeal arch?

Select one or more of the following:

Cricoid cartilage
Intrinsic muscles of the larynx
Pharyngeal constrictors
Thyroid cartilage

Explanation

Question 31 of 32

1

The medial nasal prominences fuse to form the secondary palate.

Select one of the following:

True
False

Explanation

Question 32 of 32

1

The maxillary prominences fuse to form the secondary palate.

Select one of the following:

True
False

Explanation