Brain
No description yet. This curated deck is ready for daily study.
Card preview (24)
What are the two subdivisions of nervous system and what kind of nerves do they have
Central nervous system includes brain and spinal cord. Peripheral nervous system has spinal nerves, cranial nerve, ganglia and sensory receptors
Describe the divisions of peripheral nervous system
Peripheral nervous system is divided into efferent and afferent division. Efferent division is divided into autonomic and somatic nervous system. Autonomic nervous system is divided into sympathetic and para sympathetic nervous system
What is enteric nervous system
The nervous system found any digestive tract
What are the parts of neurones
Neurones have a cell body, axons and dendrites
What does the cell body have
Cell body has lysosomes, mitochondria, golgi complex, free ribosomes and cluster of ER called nissle bodies
How does cell bodies occur in pns
They occur in clusters called ganglia
What is axon hillock
The part where the cell body and the axon meet
Why are the cytoplasm of the cell body is negatively charged
Because it has negatively charged protein
What does axon contains
It contains mitochondria microtubules and neurofibrils
Where are multipolar and bipolar neurones found
Multipolar neurones are found in brain and spinal cord, bipolar neurones are found in retina of the eye and olfactory areas of the brain
Why are unipolar neurons called pseudounipolar neuron.
Because they were bipolar in the beginning of the embryo
Which neuron act as a sensory receptors
Unipolar neurones
Function of glial cells
Glial cells help in feeding the neurons, filling the space and divide into mature neurons
Types of glial cells
There are four types of neuroglia in CNS: - Astrocytes Oligodendrocytes Ependymal cells Microglia PNS Schwann Cell Satellite Cell
What factors affect the electrical transmission
Temperature, axon diameter, myelin sheath
What is the protective connective tissue in the cranium and its type
Meninges are protective connective tissue. Dura matar, arachnoid matar and pia matar
What is the name of space between arachnoid matar and pia matar
Subarachnoid space and it has cerebrospinal fluid
What is the function of cerebrospinal fluid
It helps in transportation of Oxygen and glucose from blood to neurons. It acts as a shock absorbent.
What are ventricles
CSF fill the spaces in the brain called ventricles. They are of three types, two lateral ventricles, third ventricle and fourth ventricle.
What is blood brain barrier and how is it made
Blood brain barrier helps in filtering out pathogens and harmful substances from blood. It allows transportation of oxygen, carbon dioxide, lipid soluble molecules. It is made up of capillaries that are joint by tight junction
Three major parts of brain and their subtypes
Forebrain : Cerebrum and diencephelon (thalamus and hypothalamus) Mid brain: tectum and tegmentum Hind brain : cerebellum, medulla and pons
Corpus callosum
Mass of fibres in cerebrum
Gyri and sulci
Gyri are the fold and sulci are the depression
What is cerebral cortex
The thin outer layer covering of grey matter on the hemisphere