Valves in veins
A. make the use of a skeletal muscle pump unnecessary for venous blood flow.
B. are formed of the tunica media.
C. cause venous blood flow to go in only one direction.
D. are the leading cause of high blood pressure.
E. are found only in the largest veins.
Answer: C
You might also like to view...
Which path of arteries would a blood cell follow on its way from the thigh to the foot?
A. Deep femoral a., medial planar a., posterior tibial a., plantar arterial arch B. Femoral a., popliteal a., anterior tibial a., dorsalis pedis a. C. Internal iliac a., deep femoral a., poplitial a., posterior fibular a. D. Lateral sacral a., femoral a., hamstring a., tibial a., dorsalis pedis a. E. Femoral a., saphenous a., azygous a., anterior tibial a.
In a female pig, the vagina and the urethra empty into the ________
A) uterine horn B) penis C) urinary bladder D) urogenital sinus
Which of the following is not true of both veins and lymph vessels?
They contain backflow preventer's fluid flow through them is regulated by skeletal muscle contraction they are part of a continuous network of vessels All of the above are true of both
Which of the following is not a receptor modality based on stimulus type?
A. Chemoreceptor B. Nociceptor C. Mechanoreceptor D. Interoceptor E. Thermoreceptor