Exam 2 practice

Following the removal of the larynx, a person would be unable to:

Speak

The lipid molecule critical to lung function that coats the gas-exposed alveolar surfaces is called:

Surfactant

Contaminated mucus is removed from the lower respiratory passageways, such as the trachea, by:

Cilia

Vibration due to exhaled air that results in speech is a function of the:

True vocal cords

Which one of the following bones does NOT contain paranasal sinuses:

Mandible

Vasoconstriction and vasodilation occur due to sympathetic activation of which vessel layer?

Media

The serous membrane covering the surface of the lungs is called the:

Visceral pleura

Typically, as an artery gets farther from the heart, its diameter decreases, and there is a(n) ________.

increase in the amount of smooth muscle and a decrease in the number of elastic fibers

Veins:

often have valves to prevent the backflow of blood

The outermost layer of a blood vessel, which is very thick and composed chiefly of collagen fibers with scattered bands of elastic fibers, is the ________.

adventitia

The path of blood flow within the systemic vascular system is:

arteries, arterioles, capillary beds, venules, veins

The ________ is composed of arteries and veins that transport blood between the heart and the lungs.

pulmonary circuit

The sinoatrial node is located in the:

right atrium

Which of the following vessels has the lowest blood pressure:

venae cavae

Gas exchange occurs in the:

Alveoli

Which one of the following represents the correct path for the transmission of an impulse in the intrinsic conduction system of the heart:

sinoatrial (SA) node, atrioventricular (AV) node, atrioventricular (AV) bundle, right and left bundle branches, Purkinje fibers