Question

1. Explain how stroke volume, and cardiac output change when an individual start exercising as the heart rate increases. (Explain both cardiac output and stroke volume and the factors that affect them when answering this question).

Deep vein thromboses, blood clots that build up in a deep vein, particularly the deep saphenous vein in the leg, are seen more frequently in long-distance truck drivers, passengers on airplanes who sit for the entire trip without getting up to walk and individuals who take long trips in cars without getting out to stretch. Explain why you think this happens and how it can be avoided

Answer 1

As a person starts exercising the demand for oxygen and nutrients by the body increases activating the osmolarity and baroreceptors on the brain. This cause the stimulation of heart such that the heart rate increases along with stroke volume. The increase in stroke volume tends to push more blood to circulation and provide a backhand support along with heart which pumps faster for compensating the demand thus resulting in an increase in the blood pressure.

The condition of DVT probably occurs due to inability to send back blood from lower extremities to the heart due to compression of vessels and thus resulting into thrombosis .the blood pools down due to gravity and result in the condition