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Ket [755]
3 years ago
13

Which of the following chemical mediators is secreted onto the surface of the skin?

Biology
1 answer:
wlad13 [49]3 years ago
3 0

Answer: Sebum

Explanation: Sebaceous gland secretes sebum which is a chemical mediator that helps in lubrication and protection.

The sebaceous gland is present in skin and produces oil which is an endogenous mediator which provides a seal for the harmful microorganism so that they cannot the body through skin.

In this way it also protects the sweat gland which produces sweat.some of the bacteria that causes acne uses lipase to degrade sebum and causes infection.

Hence, the correct answer is option B

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In the system developed by Carolus Linnaeus (1707-1778), a classification of organisms consisting of related classes is a:
Sphinxa [80]

Answer:

C. phylum

Explanation:

According to the Carolus LInnaeus (1707-1778), He identified the system of classification of organisms into seven taxa which includes: Kingdom, Phylum, Class, Order, Family, Genus, species.

Kingdom:

The highest category into which organisms are classified and in which the whole of nature could fit.

Phylum:

A category used in the classification that consists of one or several similar or  closely related classes.  It is known as PHYLUM in classification of animal species and DIVISION in plant species.  

Class:

One or several similar or closely related orders.  Similar classes are said to be grouped  into PHYLUM.

Order:

One or several similar or closely related families.  Similar orders form a  

CLASS.

Family:

One or several similar or closely related genera.  Similar families are grouped  into an ORDER.

Genus (pl. genera):

A number of similar or closely related species. Similar genera are  grouped into a FAMILY.

Species:

A group of similar individuals that can breed and produce fertile offspring.  

Similar and related species are grouped into a GENUS.

4 0
3 years ago
which of the following best describes a difference between mitosis and meiosis? plz help quickly this is for a test​
abruzzese [7]

Answer:

The answer is A

Explanation:

Im am going to be honest the reason why i think its A is because Mitosis occurs in somatic cells.

5 0
2 years ago
How does cell communication and the cell cycle relate to one another?
netineya [11]
Well I know that many diseases break down in the cell communication and cell cycle is how cells move or their stages
7 0
3 years ago
Why do you see your reflection in a mirror
rosijanka [135]

Easy science. The key factor is a smooth surface, because rough surfaces scatter light instead of reflecting it. When photons — rays of light — coming from an object (your smiling face, for example) strike the smooth surface of a mirror, they bounce back at the same angle. Your eyes see these reflected photons as a mirror image.

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densk [106]

Answer:

Functions of the bones in the human body:

Support, protection, movement, mineral homeostasis

Explanation:

- Support: the bones provide a rigid support frame for muscles and soft tissues.

- Protection: the bones form several cavities that protect the internal organs from possible trauma. For example, the skull protects the brain against blows, and the rib cage, formed by ribs and sternum protects the lungs and heart.

- Movement: thanks to the muscles that are inserted into the bones through the tendons and their synchronized contraction, movement occurs.

- Mineral homeostasis: the bone tissue stores a series of minerals, especially calcium and phosphorus, necessary for muscle contraction and many other functions. When necessary, the bone releases these minerals in the blood that distributes them to other parts of the body.

8 0
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