Blood

Question 1

What is blood? Why is blood considered to be a connective tissue?

Answer 1

a fluid connective tissue that circulates throughout the body through blood vessels of the cardiovascular system.

Question 2

Identify four physiological roles of blood in the body.

Answer 2

• Delivers oxygen
• Delivers nutrients
• Removes metabolic wastes
• Transports hormones

Question 3

Describe plasma and its components.

Answer 3

the liquid component of human blood

Made up of dissolved substances like proteins, glucose and hormones

Question 4

Identify red blood cells and their major function.

Answer 4

The most numerous cells in the blood

carry proteins called antigens

Question 5

What are white blood cells? Which body system besides the cardiovascular system includes white blood cells?

Answer 5

cells in the blood that defend the body against invading microorganisms and other threats

immune system

Question 6

Explain how platelets cause coagulation.

Answer 6

Platelets become activated and change their shape from spherical to star-shaped.

This helps them aggregate with one another at the site of injury to start forming a plug in the vessel wall.

Question 7

Summarize the formation of blood cells.

Answer 7

Blood cells are made in the red marrow of bones in a process called hematopoiesis

Question 8

Summarize the degradation of blood cells.

Answer 8

• blood cells die
• The dead cells are phagocytized (engulfed and destroyed) by white blood cells and removed from the circulation.

Question 9

Identify three disorders of the blood.

Answer 9

Leukemia: group of cancers of the blood-forming tissues in the bone marrow

Hemophilia: dysfunction in the blood clotting process

HIV: infects white blood cells and interferes with the body’s ability to defend itself

Question 10

For each of the descriptions below, choose the blood cell that best fits the description.
Blood cells: red blood cells; white blood cells; platelets

A. Has a nucleus
B. Responsible for blood clotting
C. Carbon monoxide binds to a protein in these cells

Answer 10

Red blood cells: Has a nucleus
White blood cells: Responsible for blood clotting
Platelets: Carbon monoxide binds to a protein in these cells

Question 11

What is another name for erythrocytes? What is another name for leukocytes?

Answer 11

Red blood cells

White blood cells

Question 12

True or False. Plasma refers to the cytoplasm within blood cells.

Answer 12

False

Plasma refers to liquid component of human blood

Question 13

True or False. Platelets are cell fragments.

Answer 13

True