North Carolina Science Grade 7

Chapter 9: Circulation and Immunity

Circulation and Immunity

Your Results:

The correct answer for each question is indicated by a .

1.			Which of these is a function of blood? Need a Hint?
			A)	It carries saliva to the mouth.
			B)	It excretes urine from the body.
			C)	It transports nutrients to body cells.
			D)	It removes lymph from around cells.
2.			Which blood type could be called the "universal donor"? Need a Hint?
			A)	A
			B)	AB
			C)	B
			D)	O
3.			_______ are irregularly shaped cell fragments that help clot blood. Need a Hint?
			A)	Platelets
			B)	Hemoglobins
			C)	Veins
			D)	White blood cells
4.			When coal and crude oil are used up, there won't be anymore available for use for _______ of years. Need a Hint?
			A)	hemoglobin
			B)	plasma
			C)	water
			D)	nuclei
5.			Anemia affects red blood cells. Which of these cells does leukemia affect? Need a Hint?
			A)	red blood cells
			B)	plasma
			C)	white blood cells
			D)	platelets
6.			Where does the exchange of food, oxygen, and wastes occur? Need a Hint?
			A)	arteries
			B)	capillaries
			C)	trees
			D)	lymph vessels
7.			Where is blood under the greatest pressure? Need a Hint?
			A)	in the veins
			B)	in the capillaries
			C)	in the arteries
			D)	in the lymph vessels
8.			Which of these is a cause of cardiovascular disease? Need a Hint?
			A)	asbestos exposure
			B)	jogging
			C)	smoking
			D)	ultraviolet radiation
9.			Which of these systems collects and returns fluid to blood? Need a Hint?
			A)	the respiratory system
			B)	the circulatory system
			C)	the lymphatic system
			D)	the endocrine system
10.			The blood vessels that carry blood back to the heart are called _______. Need a Hint?
			A)	veins
			B)	arteries
			C)	capillaries
			D)	pulmonaries
11.			Which of these is a first-line defense against pathogens? Need a Hint?
			A)	skin
			B)	vaccination
			C)	inflammation
			D)	active immunity
12.			What are formed in the blood to fight invading antigens? Need a Hint?
			A)	hormones
			B)	allergens
			C)	antibodies
			D)	pathogens
13.			_______ immunity results when antibodies that have been produced in another animal are introduced into your body. Need a Hint?
			A)	Active
			B)	Passive
			C)	Antigen
			D)	Antibody
14.			A vaccine is a form of the _______ that gives you active immunity against a disease. Need a Hint?
			A)	antibody
			B)	bacteria
			C)	antigen
			D)	pathogen
15.			Which of these cells surround and digest foreign organisms and chemicals? Need a Hint?
			A)	red blood cells
			B)	Preservation
			C)	white blood cells
			D)	tissues
16.			_______ is the process of heating a liquid to a temperature that kills most bacteria. Need a Hint?
			A)	Radiation
			B)	Pasteurization
			C)	Fertilization
			D)	Transfusion
17.			Which disease is caused by a virus that attacks white blood cells? Need a Hint?
			A)	flu
			B)	AIDS
			C)	measles
			D)	polio
18.			Which of these is a noninfectious disease? Need a Hint?
			A)	tetanus
			B)	malaria
			C)	diabetes
			D)	influenza
19.			A disease that is caused by a virus, bacterium, protist, or fungus and is spread from an infected organism or the environment to another organism is called a(n) _______. Need a Hint?
			A)	hereditary disease
			B)	noninfectious disease
			C)	infectious disease
			D)	immune attack
20.			What chemical does your body release that promotes red, swollen tissues? Need a Hint?
			A)	antihistamines
			B)	medication
			C)	histamines
			D)	asbestos

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