Cerrar
Which of the following tunics contain structures involved with peripheral resistance?
A. Tunica intima
B. Tunica media
C. Tnica externa
D. Vasa vasorum
Which of the following vessels in involved with exchange of nutrients and gasses with tissues?
A. Elastic arteries
B. Capillaries
C. Small veins
D. Superior venacava
Myocardial infarctions most likely will not happen if there were
A. Less arteries supplying the heart
B. More coronary arteries
C. Arterial anastomoses
D. Venous anastomoses
More adipose tissue needs additional blood vessels supplying them. Resistance is increased here due to increased
A. Blood viscosity
B. Total blood vessel length
C. Blood vessel diameter
D. None of the above
Steepest fall in blood pressure happens in the
A. Aorta
B. arterioles
C. Capillaries
D. Veins
Long term regulation of blood pressure is modulated by
A. Cardioacceletory and cardioinhibitory centers in brain
B. Hormones like epinephrine and norepinephrine
C. Increased filtration by the kidney and angiotensin 2
D. Baroreceptor and chemoreceptor reflex
Mechanism involved in short term regulation of blood pressure affect
A. Blood volume
B. Peripheral resistance
When there is an increased in blood pressure baroreceptors respond by
A. Stimulate cardioinhibitory centers
B. Stimulate cardioaccelatory centers
C. Stimulate vasomotor center
D. Vasoconstriction
Which hormone involved in short term regulation of BP causes vasodilation
A. ADH
B. Atrial natriuretic peptide
C. Adrenalin
D. Angiotensin II
Orthostatic hypotension is caused by
A. Change in position
B. Poor nutritional status
C. Circulatory shock
D. all of the above
When you start exercising blood flow decreases to
A. Digestive tract
B. Brain
C. Skeletal muscle
D. Heart
Decrease oxygen in skeletal muscle cause blood vessels to
A. Vasoconstriction
B. Vasodilation
C. Smooth muscle in blood vessels contract
D. All of the above
