Deck 24: Circulation

Question 1

Megakaryocytes

A) are important in the immune response.
B) produce fibrin for blood clotting.
C) give rise to platelets.
D) carry carbon dioxide in the blood.

Answer 1

C

Question 2

Which of these is not a characteristic of an open circulatory system?

A) Found in mollusks and arthropods
B) Contains hemolymph
C) There is no distinction between blood and extracellular fluid
D) Blood is enclosed within blood vessels

Answer 2

D

Question 3

Blood plasma contains all of the following except

A) proteins.
B) salts and ions.
C) metabolites and wastes.
D) hemoglobin.

Answer 3

D

Question 4

_________________ are the blood cells that carry oxygen throughout the body.

A) Erythrocytes
B) Leukocytes
C) Thrombocytes
D) Platelets

Question 5

Some vertebrates limit heat loss in a cold environment using

A) valves in the veins.
B) a gastrovascular cavity.
C) fibrinogen.
D) interstitial fluid.
E) countercurrent heat exchange.

Question 6

Blood moves fastest when passing through a capillary.

Question 7

Exchange of nutrients and gases between tissue cells and the blood takes place through the walls of

A) veins.
B) arterioles.
C) capillaries.
D) venules.

Question 8

Trace the wave of depolarization through the heart.

A) SA node→atria→ventricles→AV node→bundle of His→Purkinje fibers
B) AV node→atria→SA node→ventricles→Purkinje fibers→bundle of His
C) AV node→atria→SA node→Purkinje fibers→bundle of His→ventricles
D) SA node→atria→AV node→bundle of His→Purkinje fibers→ventricles

Question 9

Put the terms in the correct order from the heart to the body and back to the heart.

A) arteries → arterioles → capillaries → venules → veins
B) venules → arterioles → capillaries → veins → arteries
C) veins → venules → capillaries → veins → arteries
D) arteries → venules → veins → arterioles → capillaries

Question 10

When you are scared or cold and turn pale it is because your _________ in your skin are constricting.

A) veins
B) capillaries
C) venules
D) arterioles
E) arteries

Question 11

The average lifespan of a red blood cell is approximately

A) 15 days.
B) 30 days.
C) 60 days.
D) 120 days.
E) 200 days.

Question 12

After blood flows through the right ventricle of the human heart,its next major destination is to

A) the lungs.
B) the arms.
C) the systemic system.
D) the left ventricle.

Question 13

Which type of blood cell mainly defends against parasites?

A) Erythrocytes
B) Neutrophil
C) Eosinophil
D) Basophil
E) Monocyte

Question 14

Which animal has an open circulatory system?

A) Crocodiles
B) Planarian
C) Insect
D) Earthworm
E) Whale

Question 15

How do veins prevent the backflow of blood within them?

A) By having thick,muscular walls
B) Because of the tiny lumen inside them
C) They are capable of contracting
D) They possess flaplike valves

Question 16

All vertebrates have a closed circulatory system.

Question 17

When heart valves do not close fully and a turbulence is created within the heart,this can be heard using a stethoscope as

A) a lub dub.
B) atherosclerosis.
C) a heart murmur.
D) a major heart defect.

Question 18

Macrophages,neutrophils,and lymphocytes are different types of white blood cells,or

A) erythrocytes.
B) leukocytes.
C) thrombocytes.
D) platelets.

Question 19

Platelets are important in

A) blood clotting.
B) transporting carbon dioxide.
C) the cellular immune response.
D) inflammation.
E) All of the choices are correct.

Question 20

Choose the function that does not apply to the vertebrate circulatory system.

A) Transportation
B) Regulation
C) Elimination
D) Protection

Question 21

In which order would a drop of blood in the superior vena cava encounter the four chambers of the heart and the four heart valves?

Question 22

Which valve in the human heart prevents oxygenated blood from going back into the left atrium?

A) Bicuspid (mitral)valve
B) Aortic semilunar valve
C) Tricuspid valve
D) Pulmonary semilunar valve

Question 23

Explain the protective functions of the vertebrate circulatory system.

Question 24

The heart valve guarding the entrance to the aorta is the _________ valve.

Question 25

In ____________,fats accumulate on the inner walls of the arteries,narrowing the diameters of arteries and also leading to elevated blood pressure.

A) heart murmur
B) Purkinje fibrosis
C) erythrocytosis
D) atherosclerosis

Question 26

Which of these animals does not have a closed circulatory system?

A) Earthworm
B) Fly
C) Leeches (a type of annelid)
D) Frogs
E) Killer whales

Question 27

Basophils are a type of white blood cell.

Question 28

Humans have a four-chambered heart with two separate pumping systems.

Question 29

In a ___________ circulatory system,blood is pumped by a heart through blood vessels.

Question 30

_________________ are tiny blood vessels leading away from capillaries to veins.

Question 31

Blood plasma is 90% water.

Question 32

Mollusks and arthropods have closed circulatory systems.

Question 33

The sinoatrial node initiates contraction of the heart.

Question 34

The fraction of the total volume of the blood that is occupied by red blood cells is called the blood's hematocrit.

Question 35

_________________ are blood vessels that move blood away from the heart.

Question 36

Fibrinogen's main function is as an osmotic counterforce.

Question 37

The veins leading from the lungs to the heart are the ____________ veins.

Question 38

Which animal has a gastrovascular cavity?

A) Flatworms,such as Planaria
B) Mollusks,such as clams
C) Vertebrates,such as fish
D) Arthropods,like insects

Question 39

Describe how arteries are adapted to carry high pressure blood.