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Biology Test 3 > Ch 42 > Flashcards

Ch 42 Flashcards

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1
Q

Which of these animals has a circulatory system where blood is always contained within blood vessels

A

Fish

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2
Q

A pulmonary circuit of blood flow occurs in

A

Reptiles birds and mammals

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3
Q

The exchange of materials between blood and body cells occurs through the walls of

A

Capillaries

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4
Q

Pulmonary veins carry ____ blood to the _____

A

Oxygenated

Heart

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5
Q

In animals with a 4 chambered heart, which chambers of the heart receive and pump oxygenated blood

A

Left atrium and left ventricle

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6
Q

Where does blood go directly after it leaves he right ventricle

A

Into pulmonary artery

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7
Q

In cardiac cycle, the period when blood when blood is pumped from the heart toward capillaries

A

Ventricular systole

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8
Q

SA node generates an electrical impulse from its location in the ____ and directly produces

A

Right atrium

Atrial contraction

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9
Q

An ECG shows regular atria contraction but every few bets the ventricles fail to contract. What is functioning improperly

A

AV node

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10
Q

Human blood pressure is written as ____ and the normal pressure at rest is ____

A

Systolic/ diastolic

120/80

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11
Q

Molecule of CO2 is released into systemic capillaries of your foot, travels through the heart to the lungs and is exhaled through your body. It must pass through all of of the following except

A

Left atrium

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12
Q

After a meal, _____ blood flow through capillaries of the digestive system occurs to facilitate the absorption and transport of food molecules

A

Vasodilation increases

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13
Q

Which of the following is not carried out by leukocyte

A

Transporting carbon dioxide

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14
Q

About ____ of the blood is plasma and the ____ are blood cells that contain hemoglobin

A

55%

Erythrocytes

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15
Q

Atherosclerosis is the

A

Presence of localized plaques that can reduce blood flow in arteries

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16
Q

Most gas exchange in your lungs occurs through the walls of the

A

Alveoli

17
Q

Countercurrent exchange in the gills of fish

A

Maintains a gradient that enhances the diffusion of oxygen from water into the blood

18
Q

What is the order of passage as air is inhaled during ventilation of the lungs in a typical mammal

A 
Nasal cavity
Pharynx 
Larynx 
Trachea
Bronchus
Bronchioles
Alveolus
19
Q

Which one of the following components of the mammalian gas exchange system does not have a collared surface covered by s thin film of mucus

A

Alveoli

20
Q

When you exhale,

A

Both the diaphragm and the rib muscles relax and air pressure in the alveoli becomes greater than atmospheric pressure

21
Q

The maximum amount of air a person can exhale after midi all inhalation is

A

Vital capacity

22
Q

Which of the following about respiratory systems or mammals and birds is true

A

The respiratory system of mammals is confined to the thoracic cavity but that of birds is not

23
Q

What happens when the carbon dioxide level from cellular respiration increases in the blood

A

A decrease in the ph triggers the brains breathing control centers which stimulate diaphragm and rib muscle contractions

24
Q

Most oxygen is carried by the blood ___ whereas most carbon dioxide is carried by the blood____

A

Attached to hemoglobin

In the form of bicarbonate ions

25
Q

Which structure in a human is most similar in function to the gill lamellae of a fish

A

Alveoli

26
Q

Most gas exchange in a bird lung occurs through the walls of what structures

A

Parabronchi

27
Q

As you increase in age, residual volume of the lungs ___ and your vital capacity ____

A

Increases

Decreases

28
Q

Loading of hemoglobin is favored in ____ capillaries do to ____ oxygen concentration

A

Pulmonary

High

29
Q

In response to low blood ph,_____ centers in the the medial will elicit a(n) ___ in breathing rate

A

Respiratory

Increase

30
Q

Hyperventilation______ the amount of CO2 in the blood and ____ the ph of the blood. Breathing into a paper bag ____ the ph of the blood

A

Decrease
Increases
Decreases

Biology Test 3 (3 decks)

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