Question

Question 9 1 pts In response to severe hemorrhage, what is part of the compensatory reflexive response to deal with this life- threatening event? O Decreased PNS input to arterioles to induce vasoconstriction The afferent arteriole dilation in order to maintain GER O Venodilation to increase blood returning to the heart Increased SNS input to the SA node to increase HR

Answer 1

9) In case of the severe hemorrhage , haemorrhage is defined as a loss of blood result in the decrease in volume of blood in the body . In this conditions , heart rate of the heart will increase to supply the proper amount of blood in the body. If the Afferent arteriole in the nephrons dilates , it result in the increase in GFR result in loss of water from the body which is harmful in the less blood vloume situation. Vasoconstriction due to the peripheral nervous system result in the low of supply of oxygen to the tissues and Hence, it is not preferable. Venodilation result in the decrease in the pressure of blood. Hence , it is not preferable in haemorragic conditions.  
Hence, sympathetic nervous stimulation to increase heart rate is preferable .
Hence , option 4 is the correct answer .

8) when a person drinks a large amount of water in a single sitting , it results in the increase in the Volume of blood . Atrial natriuretic peptide is released to control the volume of blood transported to the heart. It result in the Vasodilation results in the low blood pressure . Renin is not released as it is released in low blood pressure condition to maintain the glomerular filtration rate. Antidiuretic hormone is the hormone released to reduce the amount of water excreted from the kidney . In this case more amount of water is excreted out . The glomerular filtration rate will increase to excrete the excess amount of water from the body .
Hence , option 4 is the correct answer .
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