Question

True or False

1. When a normal, healthy individual does large muscle, dynamic, steady-state exercise, typically blood flow to the stomach and intestines decreases (compared to the resting value).

True

False

2. In a normal, healthy person, total peripheral vascular resistance typically increases slightly (TPR) during running (compared to resting), but TPR increases much more during heavy resistance weightlifting

True

False

3. Hemoglobin is less saturated with oxygen in a blood sample with PCO2 = 50 mm Hg than it is in a blood sample with PCO2 = 35 mm Hg.

True

False

4. Compared to rest, during exercise, PO2 is high and PCO2 is low inside contracting muscle fibers.

True

False

5. Carbon dioxide is acidic in the body because its combination with water results in formation of free hydrogen ions.

True

False

Answer 1

Ans-1

During heavy exercise blood flow to gastrointestinal organ reduced due to diversion of blood flow to working muscles.

So statement is true

Ans,-2

During aerobic exercise such as running blood flow to muscles increase, because of dilation of blood vessels, so peripheral resistance is reduced while , during in anaerobic exercise such as weight lifting muscles contract so blood flow to the muscles stop which causes peripheral resistance to increase.

So statement is false

Ans-3

Binding or saturation of gases co2 and o2 to haemoglobin is depended on partial pressure of gases, if partial pressure of particular gas is more than chances of binding to hemoglobin is higher and vice versa

So statement is true

Ans-4

As we know during exercise, anaerobic respiration is taking place, so oxygen is not used up and co2 continuously formed as a byproduct, so partial pressure of Co2 is higher than oxygen inside in exercising muscles.

So statement is false

Ans-5

Carbon dioxide(co2) react with water to form carbonic acid (H2CO3) which further release two hydrogen or proton molecules which cause body fluid more acidic.

So statement is true