Practice Mid-Semester Exam Questions Flashcards

1
Q

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

A

D) The brain stem regulates drives such as hunger and thirst

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2
Q

The parasympathetic nervous system has little effect on __________ activity

A

Ventricular

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3
Q

Smooth muscle fibres in the bladder demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:

A

Regain tension at the new length

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4
Q

A horse has been given a large injection of potassium.

This is likely to cause the membrane potential of nervous tissue to be:

A

Hypo polarised

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5
Q

After a few minutes after being penned, a flock of sheep have increased Red Blood Cell Counts.
This is due to:

A

Contraction of the Spleen

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6
Q

Microglial cells:

A

Help protect neutrons from infection

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7
Q

Platelet aggregation is inhibited by:

A

Prostacyclin

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8
Q

Total peripheral resistance is decreased by:

A

Atrial natriuretic peptide

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9
Q

A 30 kg dog is most likely to have a plasma volume of:

A

1.5 Litres

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10
Q

A pig is 5% dehydrated. The most likely sign would be:

A

Decreased capillary refill

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11
Q

Ependymal Cells:

A

Line cavities in the CNS

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12
Q

When a blood vessel is damaged, blood will leak out of the lesion.
The platelets from the blood will stick to:

A

Extravascular collagen

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13
Q

A 300 Kg sow is most likely to have a plasma volume of:

A

15 Litres

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14
Q

A dog is 5% dehydrated.

The most likely sign would be:

A

Decreased capillary refill

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15
Q

Muscle contraction is stopped by:

A

A drop in calcium level

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16
Q

High concentration of myoglobin will increase the intracellular concentration of:

A

Oxygen

17
Q

When the heart is filled with an increased volume of blood it usually produces a stronger ventricular contraction because:

A

It produces a more effective fibre length

18
Q

Smooth muscle fibres in the stomach demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:

A

Regain tension at the new length

19
Q

Lactic acid levels in muscle cells are lowered by:

A

Diffusion into the bloodstream and breakdown by the Krebs (TCA) Cycle

20
Q

After a few months on high mountain pastures a herd of cattle have increased their Packed Cell Volumes.
This is due to:

A

Secretion of erythropoietin from the kidney

21
Q

A sound is heard just before the second heart sound.

This sound is occurring during:

A

Systole

22
Q

A major function of the cerebellum is to:

A

Coordinate muscular activity during movement

23
Q

Smooth muscle fibres in the bladder demonstrate the “latch phenomenon”.
This means that when the fibres are stretched they will:

A

Regain tension at the new length

24
Q

Oligodendrocytes:

A

Produce myelin

25
Q

When a sheep has been eating St John’s Wort, liver damage can lead to a reduced production of albumin.
This will lead to:

A

More fluid to move from the capillary and into the interstitial space

26
Q

A 500kg dairy cow is most likely to have an extra-cellular fluid volume of:

A

100 L

27
Q

A sheep is 5% dehydrated.

The most likely sign would be:

A

Decreased skin elasticity

28
Q

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

A membrane potential, negative on side 1, will develop