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soldier1979 [14.2K]
3 years ago
15

What ocean zone lies over the continental shelf?

Biology
1 answer:
Angelina_Jolie [31]3 years ago
3 0
The intertidal zone lies above the continental shelf
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The primary immune response involves _________
vagabundo [1.1K]

Answer:

d. an immediate increase in the concentration of antibodies, followed by a slow decline.

Explanation:

The Primary Immune Response is mediated by antibodies, which are gamma globulin proteins formed by plasma cells (B lymphocytes). Plasmocyte is a differentiated B lymphocyte capable of actively secreting antibodies.

Antibodies are produced with the main function of neutralizing and eliminating an antigen that stimulated their production. This elimination process is done in various ways through complement fixation, opsionization, anaphylactic reaction (mast cell degranulation), substance neutralization, agglutination, etc.

To neutralize the antigen, the primary immune response promotes an immediate increase in antibody concentration. This is usually a quick process.  This concentration usually begins to decline in a slow process, but it will vary depending on the antigen.

3 0
3 years ago
What are the chararistics meoisis include
vlada-n [284]
Meiosis is a kind of cell division.
it's used to reduce half of the chromosomes and prodouce 4 gamete cells, which we call these cells haploid.
for example, it is used in human reproduction, for the sperm and ovum, in order to have a sexual reproduction.
the offspring of them are genetically non identical to the parent.
8 0
3 years ago
How does water enter the atmosphere? a. liquid water evaporates from lakes when heated by the sun. b. frozen water sublimates fr
pentagon [3]

Answer:

<u>d</u>

Explanation:

Water enters the atmosphere by :

⇒ liquid water evaporates from lakes when heated by the Sun

⇒ frozen water sublimates from ice and snow

⇒ liquid water is lost from tree leaves during evapotranspiration

7 0
2 years ago
What are the six most common elements in all living things?
lilavasa [31]

Answer:carbon,hydrogen, nitrogen, oxygen, phosphorus, sulphur

Explanation:living things are characteristized by hierarchy in their organisation.macromolecules are made up of elements each with it's unique chemical bonds.

Within the cell, macromolecules are found in organelles ,which form the cells.the cells combines into tissues,which combines into organs .organs systems consists of similar functional organs.

living things commonly contains carbon, hydrogen, nitrogen,oxygen, phosphorus and sulphur.

(Mnemonic---CHNOPS)

8 0
3 years ago
Histamine is a chemical substance released in inflammatory and allergic responses. The histamine H1 receptor on target cells is
grin007 [14]

Answer:

-Histamine binds extracellularly to the H1 receptor.

-When histamine binds to the H1 receptor. the receptor undergoes a conformation change and binds the inactive G protein.

-Once the G protein is active, it binds to the enzyme phospholipase C, activating it.

-Histamine is likely hydrophilic.

When histamine encounters a target cell, it binds extracellularly to the H1 receptor, causing a change in the shape of the receptor. This change in shape allows the G protein to bind to the H1 receptor, causing a GTP molecule to displace a GDP molecule and activating the G protein. The active G protein dissociates from the H1 receptor and binds to the enzyme phospholipase C, activating it. The active phospholipase C triggers a cellular response. The G protein then functions as a GTPase and hydrolyzes the GTP to GDP. The G protein dissociates from the enzyme and is inactive again and ready for reuse.

Explanation:

5 0
3 years ago
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