1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sophie [7]
3 years ago
13

The complement system is a ___ barrier of the immune system

Biology
2 answers:
m_a_m_a [10]3 years ago
8 0
Biochemical- apart of the second defense system
schepotkina [342]3 years ago
6 0

Answer:

biological

Explanation:

You might be interested in
Which of the following are part of the body’s first line of defense against pathogens?
Fed [463]

The answer is "D"

The body's first line of defense is also known as Innate immunity and incudes mucous membranes. Both the intact skin and mucous membranes of the body offer a high degree of protection against pathogens.

 A good example is the mucous membrane of the respiratory tract. It is lined up with cilia and covered with mucus. The coordinated beating of the cilia drives the mucus up to the nose and mouth where the trapped bacteria can be expelled.

(Lymph nodes and white blood cells belong to the second line of defense, not the first) 

3 0
3 years ago
Why did Mendel use pea plants in his experiments?
Troyanec [42]
Usually to study genetics mendel used pea plants because of the easy traits associated
3 0
2 years ago
The amount of air in the lungs after a normal exhale is called the ______________ .
il63 [147K]

Answer:

Expiratory reserve volume

8 0
3 years ago
Which term defines a well-tested, scientifically supported statement that explains how somethin
lora16 [44]

Answer:

Theory

Explanation:

It is a substantiated explanation because of the set of facts and observations on the experiment.

8 0
3 years ago
In the early 20th Century, astronomers thought that the Milky Way Galaxy was the entire universe. In fact, they considered spira
qaws [65]

Answer:

Explanation:

Based on the scenario being described within the question it can be said that the most likely reason for this misconception would be that the spiral galaxies looked like clouds of gas and dust through telescopes because of their distance from Earth. During that time telescopes were still not as advanced and could only see so much, nowadays they are much more advanced and these galaxies are being analyzed and understood more clearly.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of Newton's laws explains why your hands get red when you press them hard against a wall?
    14·2 answers
  • 2 Points
    15·1 answer
  • The orbital path of the Earth around the Sun and the orbital path of the Moon around the Earth are shown in the diagram.
    9·1 answer
  • An organisms blank are located on threadlike structures called chromosomes
    8·1 answer
  • The number of hydrogen atoms in 6NH3 is ____. 6 3 9 18
    9·1 answer
  • Answer ASAP please
    13·1 answer
  • Explain how the hydrogen ion concentration gradient is generated and how it is used to make ATP
    10·1 answer
  • HELP PLZZ!!! I WILL MARK YOU AS THE BRAINLESS ANSWER
    11·2 answers
  • What's Transpiration ?​
    6·1 answer
  • Classify each description as applying to organisms in one, several, or all of the domains of archaea, bacteria, and eukarya.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!