Questions Flashcards
What is the role of an oligodetrocyte?
It forms the myelin sheath around more than one axons in the CNS.
What are the characteristics of bipolar neurons?
Bipolar neurons have one main dendrite and one axon. They are found in the retina, the inner ear, and olfactory.
Name the twelve cranial nerves.
Olfactory. Abducens. Accessory
Optic Facial. Hypoglossal
Oculomotor. Vestibulocochlear
Trochlear. Glossopharangeal
Trigeminal. Vagus
What is the cauda equina?
The area containing the dorsal and ventral roots of the lowest spinal nerves.
There are 31 pairs of spinal nerves. Indicate how many nerves are found at each region of the spinal column.
Cervical - 8 pairs Thoracic - 12 pairs Lumbar - 5 pairs Sacral - 5 pairs Coccygeal - 1 pair
What is a dermatome?
An area of skin supplied by one spinal nerve.
Name the six autonomic plexuses.
Cardiac plexus. Superior mesenteric ganglion
Pulmonary plexus. Inferior mesenteric ganglion
Celiac plexus. Hypogastric
What is the role of Astrocytes in the CNS
- cover capillaries to form blood brain barrier
- metabolise neurotransmitters
- regulate K+ balance
- structural support
Why is white matter white and grey matter grey?
White matter contains myelinated processes. Grey matter is unmyelinated and contains - nerve cell bodies - dendrites - axon terminals - unmyelinated axons - neuroglia
Which cranial nerves are associated with the pons?
Cranial nerves ( 5 - 7 ).
- Trigeminal
- Abducens
- Facial
Which nucei are found in the epithalamus?
Habenular nuclei - emotional responses to odours
Name 8 of the nuclei found in the hypothalamus.
- Paraventricular nucleus
- Anterior hypothalmic nucleus
- Lateral pre-optic nucleus
- Suprachiasmatic nucleus
- Supraoptic nucleus
- Arcuate nucleus
- Ventromedial nucleus
- Dorsomedial nucleus
What do Ependymal cells do?
- Epithelial membrane lining cerebral cavities and central canal.
- produce cerebrospinal fluid
