BIOL 235 FINAL EXAM AND PRACTICE EXAM

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BIOL 235 FINAL EXAM AND PRACTICE EXAM

120 QUESTIONS AND CORRECT DETAILED

ANSWERS (VERIFIED ANSWERS) |ALREADY

GRADED A+

Which of the following occurs at the beginning of the ventricular diastole?

• p wave
• r wave
• q wave
• qrs complex
• t wave - CORRECT ANSWER -D

In comparison the skeletal muscle fibers, the contractile fibers of the heart are depolarized for ______ period of time.

• a shorter
• a longer
• the same - CORRECT ANSWER -B
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Which term refers to the period of time during a cardiac cycle when contraction of a chamber occurs and pressure within the chamber rises?

• filling
• systole
• repolarization
• diastole
• fibrillation - CORRECT ANSWER -B

Which event occurs during ventricular systole?

• depolarization of the SA node
• isovolumetric contraction
• filling of the atria
• opening of the AV valves
• ventricular pressure drops - CORRECT ANSWER -B

The frank starling law of the heart states that the heart is dependent upon the autonomic nervous system for a stimulus contract...

• the heart is dependent upon the autonomic nervous system

for a stimulus to contract

• the absolute refractory period for the heart must be longer

than the duration of contraction for efficient heart functioning 2 / 4

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• the heart contracts to the fullest extent possible for the

conditions, or not at all

• cardiac output equals heart rate multiplied by stroke volume -

CORRECT ANSWER -D

Which of the labeled layers in the diagram of the arterial wall consists mainly of elastic fibers and smooth muscle fibers?

• A
• B
• C
• A and B
• A, B, and C - CORRECT ANSWER -B

Which blood vessels play a key role in regulating blood distribution and pressure because their diameters may be easily and rapidly adjusted?

• elastic arteries
• arterioles
• venules
• conducting arteries
• capillaries - CORRECT ANSWER -B
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Blood flows most slowly through...

• elastic arteries because of the elastic tissue in the walls
• superior and inferior vena cava because of their low pressure
• capillaries because of their small diameters
• superior and inferior vena cava because of their large

diameters and thin walls

• capillaries because their total cross-sectional area is the

largest - CORRECT ANSWER -C

The largest driving force for pulling fluid from the interstitial spaces back into the capillaries is...

• interstitial fluid hydrostatic pressure
• interstitial fluid osmotic pressure
• blood colloid osmotic pressure
• blood hydrostatic pressure
• glomerular hydrostatic pressure - CORRECT ANSWER -C

The volume of blood that circulates through the systemic (or pulmonary) blood vessel per minute is called

• stroke volume
• tidal volume
• cardiac output
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