Sun14November1246PM 17

Within a minute of a large haemorrhage, are the following true or false?

True / False

Pulse pressure is increased Correct

Coronary vasoconstriction occurs Incorrect answer selected

Carotid chemoreceptors are inhibited Correct

Shunting of blood within the kidney Incorrect answer selected

Tachypnoea Correct

Explanation

Carotid chemoreceptors are stimulated by hypoxia (PaO2), hypercarbia (PaCO2) and H+ ions (acidosis) and lead to stimulation of the respiratory and vasomotor centres.

Most of the circulation constricts except cerebral and cardiac.

Pulse pressure is decreased.

There is decreased glomerular filtration rate and some blood may be shunted in the medullar avoiding the cortical glomeruli.

Tachypnoea occurs by stimulation of the carotid bodies and medullary chemoreceptors.

Answer Statistics

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Average score: 72.03%

Times answered: 236