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
How does the electron transport chain active during the Krebs cycle affect the hydrogen ion concentration in a mitochondria
belka [17]
Electron transport trains create a concentration gradient of hydrogen ions outside the mitochondria and fewer inside the mitochondria and creates energy(ATP) by diffusing the hydrogen ions back in
8 0
3 years ago
What is claymation?
maks197457 [2]

Answer:

B. Stop-motion animation created with clay and photographs.

(Ex...Tim Burton movies such as 'Coraline' or 'The Nightmare Before Christmas')

7 0
3 years ago
Read 2 more answers
Assuming DNA is replicated correctly (so there are no mutations),
gavmur [86]

Answer:

None of the choices would lead to all identical gametes.

Explanation:

Gametes are sex cells produced by sexually reproducing organims via a process of cell division called MEIOSIS. Meiosis is a cell division process which produces four (4) daughter cells (gametes), which are genetically different from the parent cell.

The difference in genetical content is as a result of a process unique to only meiosis called CROSSING-OVER OR RECOMBINATION. This process ensures that the genetic content of the gametes are altered. Hence, since gamete formation is done via meiosis, none of the scenarios in the option will lead to all identical gametes.

7 0
2 years ago
If humans cant see air can fish see water?
kotykmax [81]

Answer:

Nope. Neither fish nor humans see water or air, because both water and air, are transparent.

Explanation:

5 0
3 years ago
The unequal distribution of charges across the cell membrane results in the ______________.
sdas [7]
<span>This result is produced by the selective permeability of the plasma membrane when the presence of negatively charged ions does not diffuse into the cell and the action of several sodium-potassium pump units causes an unequal distribution of charges through the membrane.</span>
7 0
3 years ago
Other questions:
  • How do your shoulders and elbows move in different ways?
    12·1 answer
  • Flowering plants and shrubs are unable to grow in deciduous temperate rain forests. What is the possible reason for this phenome
    6·1 answer
  • Ten different types of culture media were inoculated with the same strain of bacteria and incubated at the same temperature. Nin
    13·1 answer
  • What three ways do plates move?(tectonic plates)
    8·1 answer
  • CAN SOMEONE PLEASE HELP ME WITH ONE OF MY BIOLOGY QUESTIONS, PLEASE?
    7·1 answer
  • Which tool is used to track which organisms are carriers of a specific trait through several generations?
    13·1 answer
  • A female with genotype FF has children with male with genotype Ff. F=Freckles fæno freckles
    12·1 answer
  • Describe how enzymes influence metabolic reactions in the cell.
    7·1 answer
  • How many cell divisions take place during mitosis?
    8·2 answers
  • What is confusion?? ??
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!