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Year 2 Semester 2 > SPOT/OSPE Revision > Flashcards

Flashcards in SPOT/OSPE Revision Deck (225)
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181

Decreased serotonin leads to increased what?

Aggression

182

What is meant by right shift?

For a given PO2, the Hb saturation is lower, hence unloading of O2 is more efficient. Lower affinity for O2

183

What is the difference between ionotropic and metabotropic receptors?

Ionotropic: fast, receptor is present on ion channel, ligand-gated eg GABA

Metabotropic: slower, receptor is separate from ion channel, sends second messenger to different receptor on ion channel eg G-protein coupled

184

Which 3 muscles flex the stifle?
What are they innervated by?
Where do they originate?

BSS
Biceps femoris
Semimembranous
Semitendinous
In= sciatic nerve
O= tuber ischium

185

Which muscles extend the stifle?
What are they innervated by?

Quadriceps (all heads)
Sartorius

In= femoral nerve

186

What is the function of the radial nerve?

Extends elbow, flexes shoulder, extends carpus and digits

187

What would happen in the cases of proximal and distal radial nerve damage?

Proximal: can't extend elbow or weight-bear
Distal: can't extend carpus (would drag paw along ground)

188

How is the olfactory epithelium of the caudal nasal cavity stimulated during sniffing?

Quiet breathing: air passes through and below the heat exchanger and is only slightly in contact with olfactory epithelium
During sniffing: air passes above the heat exchanger aswell, reaching all of the olfactory epithelium. Also leads to turbulent airflow, increasing contact between air and olfactory epithelium

189

What is the nasal septum primarily made of?

Hyaline cartilage

190

What happens to air once it is inspired?

Warmed to body temperature by blood vessels found in the connective tissue layer of the mucous membrane
Mucous secreted by goblet cells moistens the air and traps dust particles
Cilia move the mucous and trapped particles towards the pharynx to be swallowed

191

What does the olfactory epithelium consist of?

Olfactory receptor cells (bipolar neurones), support cells (pseudostratified columnar with microvilli) and basal cells (stem cells)
Receptor cells have cilia which are very long and project into the nasal cavity to interact with odour molecules

192

The axons of which cells form CN1 (olfactory nerve)?

Receptor cells of olfactory epithelium. Axons pass through the cribriform plate to synapse on neurones within the olfactory bulbs

193

What are the 2 surfaces of the soft palate?

1) Respiratory surface, facing nasal pharynx. Columnar ciliated, pseudostratified epithelium with goblet cells
2) Oral surface, facing oral pharynx. Stratified squamous epithelium with rete pegs for anchorage

194

What are the 4 attachments of the ovaries?

Ovarian lig: attaches ovary to lateral body wall at caudal pole of kidney. Contains ovarian artery and vein so must be ligated in a spay
Mesosalpinx: attaches ovary to uterine horn (part of broad lig)
Suspensory lig: attaches ovary to lateral body wall at caudal pole of kidney. Must be broken in spay to expose the ovary
Proper lig of ovary: attaches ovary to cranial end of uterine horn

195

How does the uterus attach to the lateral body wall?

Broad ligament (mesometrium)

196

The mesentery of the jejunum contains many what?

Lymph nodes, situates near the body wall
Associated with the blood vessels that drain the gut

197

What shape is the colon?

Question mark

198

Where are the adrenal glands?

They lie craniomedially to their respective kidney

199

Taste buds contain which kind of glands?

Serous

200

Why do horses have very large transverse processes?

To support the large GI tract

201

Where is the zygomatic salivary gland located?

Base of the orbit, medial to zygomatic arch

202

What lies within the palatine fissure?

Vomeronasal organ

203

What is the chief function of the dorsal, middle and ventral meatus

Dorsal: olfaction (leads to caudal dorsal nasal cavity)
Middle: communicates with maxillary sinus (all sinuses drain through here)
Ventral: main route of inspired air to lungs

204

What is a sinus?

An air-filled diverticulum of the nasal cavity

205

What part of the brain needs destroying to cause rapid death?

Medulla oblongata (cardiovascular and respiratory centre of brain)

206

Which teeth would the rostral maxillary sinus give access to in the horse?

Cheek teeth 4 and 5

207

Name 2 features of the maxillary sinus that make it prone to infection?

Frontal sinus drains into it
Close association with the upper cheek teeth, so a tooth root infection could break through the alveolar bone into the maxillary sinus

208

Which nerve innervates the lining of the frontal sinus?

Ophthalmic branch of Trigeminal

209

What structure passes through the infraorbital canal? (bony tube within the maxilla)
Where does it exit?

Infraorbital nerve (branch of maxillary trigeminal)
Infraorbital foramen

210

What are the 2 components of a vertebral disc?

Nucleus pulposus (soft centre)
Annulus fibrosis (dense fibrous tissue)