Nervous System Flashcards
What is the role of glia?
Support neurons, capable of dividing
What are the two types of nervous tissue?
Neurons and glia
What is the role of Schwann cells?
Myelinate neurons
How many pairs of cranial nerves are there?
12 pairs
How many pairs of spinal nerves are there?
31
What does the diencephalon consist of?
Hypothalamus and thalamus
What does the brain stem consist of?
Midbrain, pons and medulla
What does the thalamus do?
Acts as a relay station for sensory information
What does the hypothalamus do?
Thirst and hunger centre, thermoregulation, hormone secretion
What does the cerebellum do?
Controls balance, posture, movement coordination and muscle tone
What is the frontal lobe responsible for?
Contains motor cortex, controls intellect, planning, mood, social judgement
What is the parietal lobe responsible for?
Somatosensory cortex, general sensation and taste
What is the temple lobe responsible for?
Auditory cortex
What is the occipital lobe responsible for?
Visual cortex
Name the three layers of meninges, outer layer in
Dura mater, arachnoid mater, pia mater
What fills the subarachnoid space?
Cerebrospinal fluid
What is the function of ventricles in the brain?
Producing csf
What main vessel supplies blood to the brain?
Internal carotid artery, vertebral artery
Hat do the arteries within the brain form?
Circle of Willis
Where is Ach found in the ANS?
Preganglionic fibers for Sympathetic and parasympathetic
Postglantlionic fibers in parasympathetic only
What do nicotinic receptors do?
Control ion channels
Where are nicotinic receptors found?
At ganglionic synapses of parasympathetic and sympathetic divisions
Where are muscarinic receptors found?
In target tissues of parasympathetic postganglionic neurons
What neurotransmitter is present in postganglionic neurones of the sympathetic nervous system?
Noradrenaline
