Ch 19 multiple choice

30 terms by KatieHopper 

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Which of the following is not one of
the three main factors influencing blood pressure?

emotional state

Which of the following chemicals
does not help regulate blood pressure?

nitric acid

Which statement best describes
arteries?

All carry blood away from the heart

Which tunic of an artery contains
endothelium?

tunica intima

Permitting the exchange of nutrients
and gases between the blood and tissue cells is the primary function of ________.

capillaries

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 ________.

muscular arteries

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
vigorous exercise?

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?

Veins are called capacitance vessels or blood reservoirs

Which of the following processes
provides a long-term response to changes in blood pressure?

renal regulation

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?

Tunica media

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.

tunica intima

The arteries that directly feed into the
capillary beds are called ________.

arterioles

Fenestrated capillaries ________.

are not found in the brain

Modified capillaries that are lined with
phagocytes are called ________.

sinusoids

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.

Blood flow through the entire vascular system is equivalent to cardiac ooutput

Secondary hypertension can be
caused by ________.

COPD,
Valvular disease,
scleroderma,
recurrent thromboemboli.

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