AP (Advanced Placement) Biology: Questions 334 - 337 of 902

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Question 334

Question

MCQ▾

Bacteriophages have been used as a form of antibiotic in protecting humans from bacterial infections. Why don՚t these viruses cause human disease?

Choices

Choice (5)Response

a.

Antibodies in circulation neutralize the viruses.

b.

T cells phagocytose the bacteriophages.

c.

Human cells do not have the proper phage receptors.

d.

Macrophages phagocytose and destroy the bacteriophages.

e.

The phages are removed from circulation by attaching to the infecting bacteria.

Question 335

Question

MCQ▾

Which of the following best distinguishes serum from plasma?

Choices

Choice (5)Response

a.

Plasma contains a higher percentage of erythrocytes than serum.

b.

Serum has a higher concentration of proteins than plasma.

c.

Serum is the same thing as plasma but lacks clotting proteins.

d.

Plasma is the same thing as whole blood, whereas serum lacks the cellular components.

e.

Whereas plasma contains antibodies, serum contains only the and globulins.

Question 336

Question

MCQ▾

A sphygmomanometer is a tool used to measure blood.

Choices

Choice (5)Response

a.

Oxygenation

b.

Clotting ability

c.

Pressure

d.

Protein levels

e.

Sugar levels

Question 337

Question

MCQ▾

Which of the following statements is related to Starling՚s law of heart.

Choices

Choice (5)Response

a.

Lesser the length of cardiac muscle fibre greater is the force of contraction of heart

b.

Greater the minute volume, greater is the heart rate

c.

Greater the stroke volume greater is the heart rate

d.

Greater the intital length of the cardiac muscle fibre, more the force of contraction of heart

e.

None of the above

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