Exam 3: Clicker Questions/End of Chapter Questions

Question 1

In the formation of limb joints, which of the following signal molecules is responsible for inhibiting BMP in the region of the future joint cavity?

Answer 1

Noggin

Question 2

Pre-muscle cells in the developing limb bud are derive from which of the following sources?

Answer 2

Somitic myotomes

Question 3

The morphology of specific muscles within the limb buds is determined by which of the following factors?

Answer 3

Surrounding connective tissue

Question 4

Which of the following is observed when the forelimb rudiment of a salamander embryo is removed so that the limb fails to develop?

Answer 4

Nerves of the brachial plexus remain smaller than they would have been if the limb were still there

Question 5

Which of the following occurs when an additional lim bud is transplanted into the immediate vicinity of the host forelimb of a salamander embryo?

Answer 5

Brachial nerves will develop branches running out to the additional limb and will supply it

Question 6

The formation of clubfoot is associated with which of the following?

Answer 6

Oligohydramnios

Question 7

What molecule produced by the notochord is instrumental in inducing the floor plate of the neural tube?

Answer 7

Shh

Question 8

The cell bodies of the motor neurons of a spinal nerve arise from which of the following areas?

Answer 8

Basal plate

Question 9

Growth cones adhere strongly to a substrate containing which of the following?

Answer 9

Laminin

Question 10

Which of these cell and tissue types arises from cranial, but not trunk neural crest cells?

Answer 10

None of the above

Question 11

Which of he following is a poor substrates for migrating neural crest cells?

Answer 11

Chondroitin sulfate

Question 12

Neural crest cells arise from which of the following?

Answer 12

Neural plate

Question 13

A 65-month-old infant exhibits multiple congenital defects, including a cleft palate, deafness, ocular hypertelorism, & a white forelock but otherwise dark hair on his head. Which of the following represents the probable diagnosis?

Answer 13

Waardenburg’s syndrome

Question 14

Which of the following is involved in the migration of neural crest cells from the neural tube?

Answer 14

Snail

Question 15

An infant with a tuft of hair over the lumbar region of the vertebral column undergoes surgery for a congenital anomaly in that region. During surgery, it was found that the dura and arachnoid layers over the spinal cord were complete, but that the neural arches of several vertebrae were missing. What condition did the infant have?

Answer 15

Encephalocele

Question 16

Complete failure of the neural tube to close in the region of the spinal cord is?

Answer 16

Rachischisis

Question 17

Rhombomeres are segmental divisions of the?

Answer 17

Hindbrain

Question 18

Pregnant women typically first become aware of fetal movements during what month of pregnancy?

Answer 18

4th

Question 19

Rathke’s pouch arises from the?

Answer 19

Stomodeal ectoderm

Question 20

In the early days after birth, an infant does not pass fecal material and develops abdominal swelling. An anal opening is present. What is the probably condition?

Answer 20

Congenital megacolon

Question 21

What molecule is involved int he migration of neural crest cells from the neural tube?

Answer 21

Slug

Question 22

Which is not a derivative of the neural crest?

Answer 22

Motoneurons

Question 23

What maintains the competence of neural crest cells to differentiate into autonomic neurons?

Answer 23

Mash 1

Question 24

If the trunk neural crest cells are transplanted into the cranial region, they can form all of the following types of cells except?

Answer 24

Cartilage