Q6):a) Hazard a good guess on the number of each of the following in a Human bra
ID: 3476546 • Letter: Q
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Q6):a) Hazard a good guess on the number of each of the following in a Human brain: i) Neuronsi) Glial cells iii) the average number connections of each neuron with other neurons b) In a sagittal view of the Brain, name the parts of the Brain (divisions of the brain) in order, from the top to to the lowest. Sketch the sagittal view of the brain Q7): Describe the production and circulation of the body body? Q8): Write short notes on the following:- Cerebrospinal Fluid (CSF) in the human What special use is the CSF in the Describe the composition of the CSF a) The Blood Supply to the Brain b) The Circle of Willis in the brain, and the consequences if ruptured or traumatized c) Name the Cranial nerves. What are the characteristics of the Cranial nerves? Name what parts of the body each Cranial nerve supplies.Explanation / Answer
Question 6.
A. 1. APPROXIMATELY 100 billion.
2. Glial cells are 30 to 50 times more than neurons.
3. There are almost 100 trillion synapses between neurons.
B. Sagittal plane divides brain into right and left parts . Each part has FORE BRAIN ( PROSENCEPHALON) , MID BRAIN ( MESENCEPHALON) , HIND BRAIN ( RHOMBENCEPHALON) and diencephalon.
Question 7.
CSF is produced from choroid plexus of the ventricles in the brain. It circulates through THIRD, LATERAL and FOURTH VENTRICLE to the SPINAL CORD.
CSF serves as a cushion for brain, prevents from mechanical damage, maintains homeostasis, prevents from increased pressure.
CSF is composed of electrolytes. High quantity of chlorides, low glucose, protein free plasma , few leucocytes.
Question 8
Blood supply to the brain is by anterior, middle and posterior cerebral arteries.
Circle of Willis is formed by joining anterior , middle and posterior cerebral arteries. It's rupture leads to INTRACRANIAL HEMORRHAGE.
CRANIAL NERVESV are OLFACTORY, OPTIC , OCULOMOTOR, PATHETIC, TRIGEMINAL, ABDUCENS, FACIAL, AUDITORY, GLOSSOPHARYNGEAL, VAGUS, ACCESORY and HYPOGLOSSAL.
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