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Len [333]
3 years ago
10

What are the defense mechanisms of the human body

Biology
2 answers:
Butoxors [25]3 years ago
8 0

Answer:

Natural barriers and the immune system defend the body against organisms that can cause infection.

(see also lines and defense)

Natural barriers include the skin,mucous membranes, tears, earwax,mucus and stomach acid.

Also the normal flow of urine washes out

microorganisms that enter the urinary tract.

"Hope it helps you"

"MARK MY ANSWER AS BRANLIST ANSWER"

MaRussiya [10]3 years ago
7 0

Explanation:

The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.

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3. A student wants to copy an experiment that he read about.
Kazeer [188]

The student is actually doing replication

Answer: Option B

<u>Explanation:</u>

A student reads about a particular experiment, gets inquisitive to learn more and hence tries to copy that particular experiment. This is called as replication   as the student tries the same methodology and process adapted to perform the experiment. He tries to obtain the same result.

This result fascinates him giving assurance of the experiment. It also helps motivate trying different experiments.  It also inspires him to make further researches.

6 0
3 years ago
People once belived organisms could grow from food or dirt.How might the scientific study of cells have affected this view?
nata0808 [166]
Cells are what every living thing is made of.
5 0
3 years ago
A specialized structure within a cell that has its own specific function is known as a/an _______.
vichka [17]

Answer:

Organnelle

Ribosomes

Nucleus

Archaeabacteria

Phospholipid bilayer

Lipases

Explanation:

1. Organnelles are specialized structures in a cell designed to perform a particular function that will make the cell normal e.g. ribosome, Chloroplast, mitochondrion are examples of organnelles.

2. The Rough Endoplasmic Reticulum (RER) is one of the two endomembranous systems in the cell. It is characterized by its rough appearance which occurs as a result of ribosomes attached to its surface. This attachment of ribosomes makes its function related to protein synthesis.

3. Nucleus is a membrane bound organnelle found only in EUKARYOTIC cells. It houses the genetic material (DNA) of a cell and acts as the brain by directing all of the cellular activity of that cell.

4. Archaeabacteria is one of the six kingdoms in the hierarchical classification of living organisms. They contain unicellular and prokaryotic organisms that are uniquely characterized by their ability to survive extreme conditions e.g high temperature.

5. The plasma membrane is an outer covering that bounds the cells of both Prokaryotic and eukaryotic organisms. According to the fluid mosaic model that describes the structure of the cell membrane, it contains a phospholipid layer that confines its selective permeability upon it i.e. ability to control what goes in and out of the cell. This is due to the amphipathic nature of the phospholipid i.e. contains an hydrophobic and hydrophilic region.

6. Lipases are enzymes that are involved specifically in the breakdown of lipids and fat molecules into fatty acids and glycerol.

5 0
3 years ago
What structure supports the formation of a snowflake
True [87]
The shape of snowflakes is influenced by the temperature and humidity of the atmosphere.
<span>Snowflakes form in the atmosphere when cold water droplets freeze onto dust particles. Depending on the temperature and humidity of the air where the snowflakes form, the resulting ice crystals will grow into a myriad of different shapes.</span>
6 0
3 years ago
In a second experiment, variety A seedlings at both temperatures were treated with a chemical that prevents NADH from being oxid
Paraphin [41]

Answer:

No metabolism occur and decrease oxygen consumption.

Explanation:

There is adverse effect of chemical on metabolism and oxygen consumption of the treated seedlings because NADH is very important because it maintains the hydrogen pumping that produces ATP molecules. If NADH is oxidized to NAD, then the metabolism did not occur in the seedlings and due to no metabolism, oxygen consumption is also greatly affected.

7 0
3 years ago
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