Please answer these questions. (i would really appreciate if you also give me an
ID: 3479320 • Letter: P
Question
Please answer these questions. (i would really appreciate if you also give me an explanation)
1. Why do athletes tend to have a lower resting HR than non-athletes?
A. Their SV is higher
B. Their MAP is higher
C. Their TPR is higher
D. They have a higher blood volume
2. In atherosclerosis, which factor is affected (as the primary cause)?
A. TPR
B. HR
C. SV
D. Blood volume
E. MAP
3. In chronic hypertension, baroreceptors become less responsive to increases in MAP. This is likely due to
A. receptor desensitivity, similar to type 2 diabetes and addiction
B. death of the neurons that detect pressure
C. recruitment of the neurons in the brain that used to respond to blood pressure, but are now used for other tasks
D. Decreases in the nodal cell responsiveness to parasympathetic innervation
4. You have a patient who has a decrease in plasma protein concentration in the blood. Which of the following symptoms are consistent with this patient?
A. Hypertension
B. Tissue swelling
C. Increase in metabolism/weight loss
D. Sudden, random muscle contractions (twitches)
Explanation / Answer
ans 1. the athletes have large stroke volume than non athletes. the stroke volume is the product of blood volume to heart rate. because the athletes increase their blood volume supplied per stroke by doing cardio exercises there by the stroke volume increases per stroke.
2. as the primary cause the mean arterial pressure of the artery increases due to atheroschlerosis. there by the heart rate is increased and hence the stroke volume is increases
3. in chronic hypertension baroreceptors become less responsive to increase mean arterial pressure. this is due to the receptor desensitivity. the baroreceptors were impaired in the chronic hypertension and become chronically reset which is characterized by some elevations in the pressure threshold and the decreases in the baroreceptor activity.
4. the most common symptom of decreased plasma protein concentration in the blood is tissue swelling. the reason is that proteins provides to hold salt and the water inside of bloodvessels so that fluid dont leak out into tissues but when there is the defeciency so the fluid leaks out of the tissue causes oedema