Week 11 Development of Head

Question 1

Neural development begins with rapid division of nerve cells in a process called

A. Synaptogenesis
B. Cell migration
C. Differentiation
D. Neurogenesis

Answer 1

D. Neurogenesis

Question 2

The lumen of the embryonic neural tube persists into the adult brain.
True or false?

A. true
B. false

Answer 2

A. true

Question 3

Pharyngeal mucosa is innervated by the glossopharyngeal nerves because it
develops from the

A. First pharyngeal arc:h
B. Second pharyngeal arch
C. Third pharyngeal arch
D. Fourth pharyngeal arch

Answer 3

C. Third pharyngeal arch

Question 4

What is the embryological origin of the hyoid bone?

A. First pharyngeal arch
B. First and second pharyngeal arch
C. Second pharyngeal arch
D. Second and third pharyngeal arch

Answer 4

D. Second and third pharyngeal arch

Question 5

Which of the following muscles are derived from the first brachial arch?

A. The muscles of mastication
B. The muscles of mastication and anterior belly of digastric
C. The muscles of mastication and anterior and posterior bellies of digastric
D. The muscles of mastication, anterior and posterior bellies of digastric and
geniohyoid

Answer 5

B. The muscles of mastication and anterior belly of digastric

Question 6

In the 4th week after conception, the neural tube develops three swellings:

A. telencephalon, diencephalon and myelencephalon
B. telencephalon, diencephalon and metencephalon
C. cerebral cortex, limbic system and basal ganglia
D. forebrain, midbrain and hindbrain

Answer 6

D. forebrain, midbrain and hindbrain

Question 7

Spina bifida cystica and encephalocele:
A. are often caused by a failure of the neural tube to close
B. have their inception during the fourth week of development
C. always occur together in the affected individual
D. have as their primary cause a defect in development of bone

Answer 7

A. are often caused by a failure of the neural tube to close

Question 8

What is the embryological origin of the ear ossicles?

A. First pharyngeal arch
B. First and second pharyngeal arch
C. Second pharyngeal arch
D. Third pharyngeal arch

Answer 8

B. First and second pharyngeal arch

Question 9

What is the embryological origin of the trigeminal nerve?

A. First pharyngeal arch
B. Second pharyngeal arch
C. Third pharyngeal arch
D. Fourth pharyngeal arch

Answer 9

A. First pharyngeal arch

Question 10

During week 4, the neural plate develops from the:

A. Endoderm
B. Mesoderm
C. Ectoderm
D. Mesenchyme
E. Neural crest

Answer 10

C. Ectoderm

Question 11

Neurulation occurs at _____ weeks.

A. 2
B. 3
C. 4
D. 5
E. 6

Answer 11

B. 3

Question 12

Which of the following is the process of
formation of nervous system?

A. Fertilization.
B. Gastrulation.
C. Implantation.
D. Neurulation.

Answer 12

D. Neurulation.

Question 13

The nervous system develops from the
____________.

A. ectoderm
B. mesoderm
C. endoderm
D. Portions of all of the above
E. coelom

Answer 13

A. ectoderm

Question 14

The anterior end of the neural tube develops
into the _________.

A. notochord
B. heart
C. brain
D. gut
E. gonads

Answer 14

C. brain

Question 15

In humans, the fourth pair of pharyngeal
pouches become _________.

A. tonsils
B. The thymus gland
C. Parathyroid glands
D. All of the above
E. lungs

Answer 15

C. Parathyroid glands

Question 16

Answer 16

Question 17

Answer 17

Question 18

Answer 18

Question 19

Answer 19