Doctors suggest that during long periods of sitting, you should flex and extend your feet at the ankles periodically and squeeze your calf muscles to assist with blood circulation. Why would non-exercise muscle contraction affect blood flow and cardiovascular health?
A. Contraction of muscles stimulates the arteries to vasodilate, reducing blood pressure.
B. Contraction of the leg muscles stimulates baroreceptors to signal the autonomic nervous system and decrease blood pressure and heart rate from multiple fronts.
C. Contraction of muscles itself increases heart rate and burns calories, keeping the heart strong and assisting in maintaining healthy weight.
D. Contraction of the leg muscles squeezes leg veins, which functions as a pumping mechanism to return deoxygenated blood to the heart.
Answer: D
You might also like to view...
Which hormone is secreted by the corpus luteum after ovulation?
a) Progesterone b) Relaxin c) LH d) FSH e) HGH
Describe the structure and function of cilia and flagella. Be sure to include the following in your answer : basal body, doublets, triplets, dynein, fused, unfused, and "9+2."
What will be an ideal response?
Which of the following stimulates uterine contractions?
a. oxytocin from the posterior pituitary b. prostaglandin from the decidua c. progesterone from the placenta d. both (a) and (b) above. e. all of these answers.
All of the following provide chemoreceptor input to the respiratory centers of the medulla oblongata except the
A) olfactory epithelium. B) medullary chemoreceptors. C) aortic sinuses. D) carotid sinuses. E) All of the answers are correct.