Lecture 2

Question 1

spinal cord

Answer 1

• processes sensory info from trunk and extremities
• site of motor neurons and interneurons

Question 2

brainstem

Answer 2

mimics spinal cord actions, but for the head and trunk

Question 3

medulla

Answer 3

center for digestion

Question 4

pons

Answer 4

relays info to higher levels for processing

Question 5

cerebrospinal fluid circulation

Answer 5

lateral ventricles -> interventricular foramen -> 3rd ventricle -> cerebral aqueduct -> 4th ventricle -> central canal of spinal cord -> subarchnoid spaces of brain and spinal cord

Question 6

3 meninges

Answer 6

• dura mater: tough, outer meninge
• arachnoid: weblike layer
• pia mater: thin, deep meninge, which is adhered to all external surfaces of brain and spinal cord

Question 7

neurons

Answer 7

• electrically excitable cells
• connections allow communication across synapses

Question 8

neuroglial cells

Answer 8

• non neuronal cells
• supportive cells
• can also make synaptic contacts with neurons

Question 9

neurons include..

Answer 9

• dendrites
• cell body
• axon terminals
• synaptic vesicles
• neurotransmitters
• synaptic cleft
• receptors

Question 10

neural tube

Answer 10

starts fusing at the beginning of the 4th week

Question 11

by the end of 5th week..

Answer 11

3 primitive regions and 2 flexures

Question 12

phases of brain development

Answer 12

1. histogenesis
2. cell migration
3. cell process formation
4. myelination
5. synapse migration
6. cell death

Question 13

stage 1 - histogenesis

Answer 13

differentiation of cells into tissues