BIOB33 MODULE 6 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS GRADED A++
Primary brain vesicles in the cephalic area enlarge to form what? (4th week of
development)
prosencephalon, mesencephalon, rhombencephalon
What does the prosencephalon form at 6 weeks?
Telencephalon (cerebellum), diencephalon (epithalamus, thalamus, hypothalamus).
What does the rhombencephalon form at 6 weeks?
Metencephalon (cerebellum and pons), myelencephalon (medulla oblongata).
What is grey matter?
Forms the cortex, outermost regions, forms nuclei, not myelenated, densely packed
neurosomas.
What is white matter?
Deep to cortical grey matter (opposite of spinal cord), connects brain regions, lined with
myelin.
Define cerebrum.
83% of brain volume, 2 cerebral hemispheres (gyri and sulci), longitudinal fissure,
corpus callosum.
Define cerebellum.
50% of neurons, second largest region, located in posterior cranial fossa.
Name the 3 regions in the diencephalon.
, thalamus (sensory information), hypothalamus (visceral control centre), epithalamus
(pineal gland)
What does the medulla oblongata do?
Relays information to to the thalamus.
What does the pons do?
Relays information to the cerebellum
What releases CSF?
Choroid plexus.
What type of cell produces CSF?
Ependymal cells.
What are the three cranial meninges?
Dura mater (superficial), arachnoid mater (middle), pia matter (deep).
Name the two points of entry for blood and the brain.
Blood-brain barrier, blood-CSF barrier.
Functions of the medulla oblongata.
All communication between the brain and spinal cord passed through, relay stations for
sensory information, associated with cranial nerves, associated with autonomic control
of visceral organs.
What four cranial nerves begin or end in medulla?
VIII (vestibulochochlear), IX (glossopharyngeal), X (vagus), XII (hypoglossal).
What cranial nerves does the pons have?
V (trigeminal), VI (abducens - eye), VII (facial), VIII (vestibulochochlear - sensory).
Functions of the pons.
WITH COMPLETE SOLUTIONS GRADED A++
Primary brain vesicles in the cephalic area enlarge to form what? (4th week of
development)
prosencephalon, mesencephalon, rhombencephalon
What does the prosencephalon form at 6 weeks?
Telencephalon (cerebellum), diencephalon (epithalamus, thalamus, hypothalamus).
What does the rhombencephalon form at 6 weeks?
Metencephalon (cerebellum and pons), myelencephalon (medulla oblongata).
What is grey matter?
Forms the cortex, outermost regions, forms nuclei, not myelenated, densely packed
neurosomas.
What is white matter?
Deep to cortical grey matter (opposite of spinal cord), connects brain regions, lined with
myelin.
Define cerebrum.
83% of brain volume, 2 cerebral hemispheres (gyri and sulci), longitudinal fissure,
corpus callosum.
Define cerebellum.
50% of neurons, second largest region, located in posterior cranial fossa.
Name the 3 regions in the diencephalon.
, thalamus (sensory information), hypothalamus (visceral control centre), epithalamus
(pineal gland)
What does the medulla oblongata do?
Relays information to to the thalamus.
What does the pons do?
Relays information to the cerebellum
What releases CSF?
Choroid plexus.
What type of cell produces CSF?
Ependymal cells.
What are the three cranial meninges?
Dura mater (superficial), arachnoid mater (middle), pia matter (deep).
Name the two points of entry for blood and the brain.
Blood-brain barrier, blood-CSF barrier.
Functions of the medulla oblongata.
All communication between the brain and spinal cord passed through, relay stations for
sensory information, associated with cranial nerves, associated with autonomic control
of visceral organs.
What four cranial nerves begin or end in medulla?
VIII (vestibulochochlear), IX (glossopharyngeal), X (vagus), XII (hypoglossal).
What cranial nerves does the pons have?
V (trigeminal), VI (abducens - eye), VII (facial), VIII (vestibulochochlear - sensory).
Functions of the pons.
