Question

question 46
1 pts
blood vessels that are designed to carry blood under high pressure are called ____. blood vessels that have thin, porous walls are called ____.
question 47
1 pts
several types of immunity are recognized; which type of immunity is produced through successful vaccination?

• passive artificial immunity
• active artificial immunity
• active natural immunity
• passive natural immunity

Explanation:

Question 46

Step1: Recall blood vessel types

Arteries carry blood under high pressure (thick walls to withstand pressure). Capillaries have thin, porous walls for exchange.

Step2: Fill in the blanks

First blank: arteries; Second blank: capillaries.

Vaccination is artificial (not natural exposure). Active immunity is when the body produces antibodies (vaccine triggers immune response to make antibodies, so active artificial immunity). Passive is receiving antibodies, natural is from infection.

Answer:

arteries; capillaries

Question 47