4028SPO 2024/25 Week 04

Closer to the heart, arteries would be expected to have a higher percentage of ________.

• endothelium

• smooth muscle fibers

• elastic fibers

• collagenous fibers

In a blood pressure measurement of 110/70, the number 70 is the ________.

• systolic pressure

• diastolic pressure

• pulse pressure

• mean arterial pressure

A healthy elastic artery ________.

• is compliant

• reduces blood flow

• is a resistance artery

• has a thin wall and irregular lumen

Venoconstriction increases which of the following?

• blood pressure within the vein

• blood flow within the vein

• return of blood to the heart

• all of the responses are true

Clusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as ________.

• baroreceptors

• angioreceptors

• the cardiomotor mechanism

• the cardiovascular center

What is the function of the conchae in the nasal cavity?

• increase surface area

• exchange gases

• maintain surface tension

• maintain air pressure

Which of the following structures is not part of the bronchial tree?

• alveoli

• bronchi

• terminal bronchioles

• respiratory bronchioles

A decrease in volume leads to a(n) ________ pressure.

• decrease in

• equalization of

• increase in

• zero

Which of the following prevents the alveoli from collapsing?

• residual volume

• tidal volume

• expiratory reserve volume

• inspiratory reserve volume

Gas exchange that occurs at the level of the tissues is called ________.

• external respiration

• interpulmonary respiration

• internal respiration

• pulmonary ventilation