Question

A student is tired of studying and decides to take a break – because he has not slept for 34 hours he bumps his toe and reflexively pulls his leg back. He looks down to see what he tripped over. His brain picks up that he is on unlevel ground and he walks forward two steps to try to regain his balance.

F. Tripping is stressful – how will his body respond to this stress – explain the G protein mechanisms at the target tissues and the target tissue response

G. What changes would you expect to see in his EKG? Draw both a normal EKG and one from his stressed state. Label one of them well with the names of the waves and what causes them.

Answer 1

G proteins at Target tissue during stress respond to epinephrine when epinephrine attached to the receptor it causes

aal

There is release of GTP from the intracellular portion of the receptor which converts c AMP to ATP which phosprylates the ionic receptors preventing the entry of ions into the cells thereby reducing cellular activity in the area of stress