Practice Mid-Semester Exam Questions Flashcards
Which of the following statements concerning the brain stem is incorrect?
A) The medulla is part of the brain stem
B) The brain stem is a critical connecting link through connecting link through which all fibres traversing between the periphery and higher brain centres must pass
C) The brain stem contains centres that control respiration, blood vessel and heart function, and digestive activities
D) The brain stem regulates drives such as hunger and thirst
D) The brain stem regulates drives such as hunger and thirst
The parasympathetic nervous system has little effect on __________ activity
Ventricular
Smooth muscle fibres in the bladder demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:
Regain tension at the new length
A horse has been given a large injection of potassium.
This is likely to cause the membrane potential of nervous tissue to be:
Hypo polarised
After a few minutes after being penned, a flock of sheep have increased Red Blood Cell Counts.
This is due to:
Contraction of the Spleen
Microglial cells:
Help protect neutrons from infection
Platelet aggregation is inhibited by:
Prostacyclin
Total peripheral resistance is decreased by:
Atrial natriuretic peptide
A 30 kg dog is most likely to have a plasma volume of:
1.5 Litres
A pig is 5% dehydrated. The most likely sign would be:
Decreased capillary refill
Ependymal Cells:
Line cavities in the CNS
When a blood vessel is damaged, blood will leak out of the lesion.
The platelets from the blood will stick to:
Extravascular collagen
A 300 Kg sow is most likely to have a plasma volume of:
15 Litres
A dog is 5% dehydrated.
The most likely sign would be:
Decreased capillary refill
Muscle contraction is stopped by:
A drop in calcium level
High concentration of myoglobin will increase the intracellular concentration of:
Oxygen
When the heart is filled with an increased volume of blood it usually produces a stronger ventricular contraction because:
It produces a more effective fibre length
Smooth muscle fibres in the stomach demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:
Regain tension at the new length
Lactic acid levels in muscle cells are lowered by:
Diffusion into the bloodstream and breakdown by the Krebs (TCA) Cycle
After a few months on high mountain pastures a herd of cattle have increased their Packed Cell Volumes.
This is due to:
Secretion of erythropoietin from the kidney
A sound is heard just before the second heart sound.
This sound is occurring during:
Systole
A major function of the cerebellum is to:
Coordinate muscular activity during movement
Smooth muscle fibres in the bladder demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:
Regain tension at the new length
Oligodendrocytes:
Produce myelin
When a sheep has been eating St John’s Wort, liver damage can lead to a reduced production of albumin.
This will lead to:
More fluid to move from the capillary and into the interstitial space
A 500kg dairy cow is most likely to have an extra-cellular fluid volume of:
100 L
A sheep is 5% dehydrated.
The most likely sign would be:
Decreased skin elasticity
Assume that a membrane that is permeable to Na+ but not to Cl- separates two solutions.
The concentration of sodium chloride on side 1 is much higher than on side 2.
What ionic movement will take place?
A membrane potential, negative on side 1, will develop
