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
Aneli [31]
3 years ago
10

All of the following protect the skin and mucous membranes from infection except

Biology
1 answer:
leva [86]3 years ago
5 0

The question is incomplete. Th ecomplete question is as following:

All of the following protect the skin and mucous membranes from infection EXCEPT  

A) multiple layers of cells.

B) tears.

C) saliva.

D) HCl.

E) the "ciliary escalator."

Answer: D) HCl.

Explanation:

  • The epidermis, the outer layer of the skin provides waterproofing and serves as a barrier to infection and other laers also sustain any type of injury.  
  • Tears wash out foreign bodies which enter the eye. In addition, tears contain a substance called lysozyme which has an antibacterial function and works to prevent microbial invasion and infection.  
  • Saliva protects against infection, especially via the innate immune system. This mechanism is an important first-line protection against bacterial and viral infection
  • The mucociliar escalator is within the conducting airways and is composed of mucus and cilia that transfer the mucus up and out of the lungs where it can be removed by coughing or swallowing,

Whereas HCL helps in the digestion process.

Hence, the correct option is D.

You might be interested in
Basal metabolism is the largest component of total energy expenditure. True or False
irina1246 [14]

Answer: True

Explanation: The basal metabolic rate (BMR) is responsible for about 75% of our calorie expenditure daily. The Basal metabolic rate (BMR) is the energy expenditure rate per unit time by humans or animals at rest. it is the amount of energy per unit of time that we need to keep the body functioning daily even when at rest. Some of these processes that occur even when we are at rest includes blood circulation, brain function, regulation of body temperature, nerve function, cell growth and breathing.

5 0
3 years ago
Help Me With This Question
mrs_skeptik [129]
Under nose is the answer
7 0
3 years ago
What is the difference between plant cells and animal cells<br>​
marin [14]
A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. ... Animal cells simply have a cell membrane, but no cell wall.
4 0
3 years ago
Read 2 more answers
How fast can you answer correct..? How fast can i give you brainliest. Explain Your answer:Q
Brilliant_brown [7]

Answer:

D or A

Explanation:

3 0
3 years ago
Read 2 more answers
Which of these is evidence of global warming?
Diano4ka-milaya [45]

The answer would be C, The rising of global temperatures, why?


Well, global warming means that the worlds temperature is rising.


So, rising global temperature is solid evidence the world is warming up.


Hope this helped! c:

7 0
4 years ago
Read 2 more answers
Other questions:
  • Conserving the quality of available water is a high priority world-wide. There are many countries whose water supply is reaching
    6·2 answers
  • The rotation of air around a high-pressure center is called a(n)
    13·1 answer
  • During the production of fertilizer, NH(am) reacts with H3PO4(aq). For this chemical reaction, match each description with the a
    12·2 answers
  • Please help fast
    10·2 answers
  • WILL GIVE BRAINY!!
    14·1 answer
  • Clouds form when water vapor in the atmosphere cools to _______.
    15·2 answers
  • During a microscopic view of reproductive stages of bacteria cells, a tube connecting two bacterial cells was noticed.
    7·2 answers
  • What is pseudoscience? Students have been comparing pseudoscience with "real" science. Their teacher told them to make a chart c
    15·1 answer
  • Gregory Mendel was the first to use ( ) to explain genetic heredity and to trace one trait through ( ).
    6·2 answers
  • EASY QUESTION
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!