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Ch 19 multiple choice
Which of the following is not one of
the three main factors influencing blood pressure?
Which of the following chemicals
does not help regulate blood pressure?
Which statement best describes
All carry blood away from the heart
Which tunic of an artery contains
Permitting the exchange of nutrients
and gases between the blood and tissue cells is the primary function of ________.
The circulatory route that runs from
the digestive tract to the liver is called ________.
hepatic portal circulation
The arteries that are also called
distributing arteries are the ________.
Aldosterone will ________.
promote an increase in blood pressure
The pulse pressure is ________.
systolic pressure minus diastolic pressure
Which of the following signs of
hypovolemic shock is a relatively late sign?
rapidly falling blood pressure
Which of the following is likely during
Capillaries of the active muscles will be engorged with blood.
Which of the choices below explains
why the arterioles are known as resistance vessels?
The contraction and relaxation of the smooth muscle in their walls can change their diameter.
Which of the following is true about
Veins are called capacitance vessels or blood reservoirs
Which of the following processes
provides a long-term response to changes in blood pressure?
Peripheral resistance ________.
increases as blood vessel diameter increases
Brain blood flow autoregulation __________.
is abolished when abnormally high CO2 levels persist
Blood flow to the skin ________.
increases when body temperature drops so that the skin does not freeze
Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?
The influence of blood vessel
diameter on peripheral resistance is ________.
significant because resistance is inversely proportional to the fourth power of the vessel radius
The form of circulatory shock known
as hypovolemic shock is ________.
shock that results from large-scale loss of blood volume, or after severe vomiting or diarrhea
In the dynamics of blood flow through
capillaries, hydrostatic pressure ________.
is the same as capillary blood pressure
The hepatic portal vein ________.
carries nutrient-rich blood to the liver
The term ductus venosus refers to
a special fetal vessel that allows umbilical blood to bypass the liver
Histologically, the ________ is
squamous epithelium supported by a sparse connective tissue layer.
The arteries that directly feed into the
capillary beds are called ________.
Fenestrated capillaries ________.
are not found in the brain
Modified capillaries that are lined with
phagocytes are called ________.
Which of the following blood
pressure readings would be indicative of hypertension?
140/90 in a 70-year-old woman
Select the correct statement about
Blood flow through the entire vascular system is equivalent to cardiac ooutput
Secondary hypertension can be
caused by ________.