Question

you mbar Puncture or Spinal Tap During a spinallar, what structures does the needle the it with the outer part of them yin. Also, CROSS OFF the stre and Structures or spaces that the needle does NOT reach hypodermis moid mater dermis dura mater epidermis epidural space sudurnl space pia mater spinal cord subarachid space Describe the structure and function of the blood-brain barrier V IATCH THE FOLLOWINGS IN TERMS OF THEIR FUNCTIONS: a. Motor function Occipital lobe b. Sensory (not associated with special senses) Temporal lobe c. relay station Frontal lobe d. Visual sensory images Parietal lobe e. Hearing Thalamus

Answer 1

su rachnoid space Page Dusing a spinal tap, structures the needle Epidermis Dermis - Hypodermis go through are- Epidural space Arachnoid mater t Subdural space - Dura mater Subarachnoid space. oli oe s v Hypodermis I Dermis h Epidermis I Subdural space X Spinal cord I X v Arachnoid mater Dura mateo Epidural space Pia mater subarachnoid space

Luc Structure and function of blood brain bardier. The brain has a large netwook of asterial and venous vessels taking blood to and from brain tissue. However, most of action. occurs at the level of capillaries Both luminal and abluminal coutea surface of the vessel ) sides are lined by key structures that contribute to the integrity of the cells. fiostly , squamous epithelial cells from the endothelial wall of the capillaries; the luminal surface of these cells comes into contact with circulating blood and its constituents. The abluminal surface is in contact with a cirum- ferentially continuous basement membrane. The endothelial cells are anchored to each others by zonola occludens or tight junctions as well as zonulae adherens. The former provide structural support to the endothelial wall, while the latter physically connects adjacent cells. Additionally, the tight junctions clriums caibe the cells and provide a seal with all adjacent cells. Therefore, the endothelium functions as an impermeable barrier between the capillary lumen and brain tissue

Periceptes act as an integral component in the formation of the blood-brain bardier. These cells ancircle endothelial cells of capillaries and are able to contract in ordeo to regulate capillary blood flow. Consequently, the contractility also regulates the amount of blood flowing through the capillaries, thus enhancing the blood- brain barrier. Periute also promote the formation of tight junctions and also inhibit the production of chemicals that promote vascular permeability: Astrocytes are highly branched cells with small bodies found both in white mateo as well as in grey matter. The podocytes of both fibrous and protoplasmica astrocytes not only encuocle nerve fibres and nevaonal gomas , but they also surround the abluminal surface of the capillaries. As this point, the processes are referred to as perivascular endfeet. Functions are - • Protects brain from foreign substances in the blood that may injure the brain... • Protects the brain from hormones and neurotransmitters in the rest of the body. • Maintains a constant environment for the brain Match 1. Occipital lobe 2. Temporal lobe 3. Frontal lobe 4. Parietal lobe 5. Thalamus do Visual sensory image e. Hearing a. Motor function b. sensory C Relay station