Walden PUBH6170 week 10 quiz

Question 1

1. Which of the following parts of the brain regulates heart activity?

   Answer

   		cerebrum
   		cerebellum
   		thalamus
   		midbrain
   		medulla oblongata

1 points

Question 2

1. Which of the following is not a symptom of botulism?

   Answer

   		vomiting
   		paralysis of muscles used for breathing
   		difficulty swallowing
   		double vision
   		rash

1 points

Question 3

1. Which of the following best explains why humans must constantly breathe in oxygen in order to stay alive?

   Answer

   		Oxygen is an important source of energy for cells.
   		Oxygen is the final electron acceptor in the process of cellular respiration, which results in the production of the ATPs required to fuel cell functions.
   		Oxygen must be available to cells in order for them to make the sugars necessary to supply energy for cell functions.
   		Oxygen is used to drive the anaerobic breakdown of sugars for the production of ATP.
   		Oxygen is converted to carbon dioxide, which is then used to drive the production of ADP.

1 points

Question 4

1. Which of the following is true regarding lung cancer?

   Answer

   		Symptoms include chest pain, chronic cough, and wheezing.
   		Lung cancer may be treated with surgery, chemotherapy, and/or radiation.
   		This type of cancer typically takes many years to develop.
   		Problems associated with lung cancer include inadequate exchange of gases in the alveoli and impairment of blood flow in the pulmonary blood vessels.
   		all of the above

1 points

Question 5

1. Which of the following is not true regarding arrhythmias?

   Answer

   		One type, known as ventricular fibrillation, is the leading cause of cardiac death in people who are otherwise in good health.
   		An artificial pacemaker can sometimes be used to correct this condition.
   		All forms of arrhythmias are considered serious medical conditions.
   		Arrhythmias can occur when heart muscle becomes damaged.
   		An ECG can be used to diagnose this condition.

1 points

Question 6

1. Which of the following is a correct statement?

   Answer

   		Blood pressure is higher in veins than arteries since blood must be returned to the heart.
   		Veins are more distensible than arteries.
   		Veins have a smaller lumen than arteries.
   		The walls of veins are made up of two distinct layers of tissues.
   		Veins carry blood to the capillaries of the body.

1 points

Question 7

1. Vasoconstriction causes an increase in the diameter of blood vessels, thus causing an increase in blood flow to the tissues.

   Answer

   True

   False

1 points

Question 8

1. Which of the following is not true regarding the lymphatic system?

   Answer

   		The lymphatic system removes microorganisms from body fluid.
   		Lymph flows from lymph capillaries to larger lymphatic vessels to the heart and lungs.
   		Lymphatic capillaries absorb lipid droplets from interstitial fluid.
   		Lymph is returned to the cardiovascular system where it once more becomes a part of blood plasma.
   		Lymphatic capillaries absorb excess fluid from the tissues.

1 points

Question 9

1. Physicians recommend that people breathe through their noses instead of their mouths. Which of the following occurs as air is drawn through the nose?

   Answer

   		Air is dried.
   		Carbon dioxide is removed from the air.
   		Air is warmed.
   		Air is filtered.
   		Air is warmed and filtered.

1 points

Question 10

1. Vasoconstriction and vasodilation of blood vessels are caused by a number of factors including:

   Answer

   		emotions
   		closing/opening of precapillary sphincters
   		hormones
   		nervous stimulation
   		all of the above

1 points

Question 11

1. Which of the following is not a symptom of a heart attack?

   Answer

   		pain in the upper abdomen
   		intense chest pain
   		difficulty in breathing
   		nausea
   		pain in the right chest and arm

1 points

Question 12

1. When the force of blood on the walls of blood vessels drops below normal, the condition is referred to as

   Answer

   		blood pressure
   		hypotension
   		hypertension
   		aneurysm
   		none of the above

1 points

Question 13

1. A patient was diagnosed with hypertension. This condition could result in all of the following except:

   Answer

   		heart failure.
   		hardened and scarred arteries.
   		kidney damage.
   		low blood pressure.
   		greater resistance to blood flow in blood vessels.

1 points

Question 14

1. Which of the following is true regarding the effect of smoking on the respiratory system?

   Answer

   		The production of mucus increases in response to the presence of smoke.
   		Smoking destroys cilia lining the respiratory tract.
   		Particles and debris from the smoke accumulate in the mucus of the airway and increase risk for infections by pathogens.
   		“Smoker’s cough” results from the heavy coughing that is necessary to clear accumulated mucus/particles from the airway.
   		all of the above

1 points

Question 15

1. Which of the following would result in a decrease in cardiac output?

   Answer

   		increased heart rate
   		decreased stroke volume
   		exercise
   		strong emotions
   		activation of the sympathetic nervous system

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