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biology120 > ch.23 > Flashcards

ch.23 Flashcards

1
Q

blood flows from two chambered heart through the gills then the rest of the body

A

single circulation

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2
Q

body undergo deep pressure when goes through lungs, 3 chambered heart

A

double circulation

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3
Q

blood clotting

A

platelets

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4
Q

heart attack

A

myocardial infarction

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5
Q

the heart muscle is relaxed; blood flows into all four chambers of the heart

A

diastole

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6
Q

the atria contract, pushing blood into the ventricles

A

atrial systole

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7
Q

the ventricles contract; forcing blood out the heart

A

ventricular systole

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8
Q

both ventricles pump the same volume, but the left ventricles pumps with greater force

A

cardiac output

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9
Q

plaque/cholesterol that is plugging the blood from going to parts of the heart and leads to to MI;

A

atherosclerosis

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10
Q

What is the major constituent of atherosclerotic plaque?

A

cholesterol

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11
Q

Which of the following contribute to, or increase the risk of, heart disease? Choose all that apply.

A

smoking; sedentary lifestyle; a diet rich in animal products ; diabetes

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12
Q

Where does the signal to initiate a heart beat originate?

A

SA node

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13
Q

What is the role of the AV node?

A

to relay a signal for the ventricles to contract

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14
Q

What is the role of red blood cells?

A

to carry oxygen to all the parts of the body

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15
Q

What do we call the non-cellular fraction of blood?

A

plasma

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16
Q

What is the main function of the circulatory system?

A

to distribute nutrients and collect waste throughout the body

17
Q

What is the most common cause of death in the US?

A

cardiovascular disease

18
Q

In a ___ circulatory system, fluid leaves the vessels and bathes the tissue, while in a ___ circulatory system, fluid is confined to vessels and nutrients and waste are exchanged with body fluids.

A

open ; closed

19
Q

What kinds of animals have open circulatory systems?

A

arthropods and most mollusks

20
Q

Which are chambers of the human heart?

A

right atrium
left ventricle
right ventricle
left atrium

biology120 (4 decks)

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