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vfiekz [6]
1 year ago
14

Specific excretory organs are absent in unicellular organisms belong to the phylum.

Medicine
1 answer:
jok3333 [9.3K]1 year ago
3 0

Specific excretory organs are absent in unicellular organisms belonging to the<u> phylum Porifera.</u>

The organisms of the phylum Porifera are classified under the kingdom Animalia and they lack specific organs in their bodies.

The word "Porifera" refers to pore-bearing organisms.

These animals have loosely organized cells and are found in freshwater marine ecosystems.

On their body, a large number of pores - Ostia - are present which perform various functions such as excretion.

However, respiratory gases and waste materials are exchanged through a diffusion process.

Moreover, in them, reproduction takes place through fragmentation and budding.

If you need to learn more about excretory organs click here:

brainly.com/question/28302813

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After a signal binds to a signal receptor, the next step is transduction. Why is the signal transduction step necessary?.
mr_godi [17]

Cells respond to environmental effects through signal transduction, which promotes healthy cell growth and normal cell function.

<h3>Why is the signal transduction step necessary?</h3>

The reason why after a signal binds to a signal receptor, we need the next step is as follows:

  • For the purpose of triggering an appropriate cellular response, living creatures have evolved a vast range of intricate procedures to send signals from the outside to the inside.
  • These molecular pathways can develop flaws that result in a variety of ailments, including diabetes, cancer, and psychotic conditions.
  • It is the mechanism by which a cell responds to the stimuli it receives from the environment by diffusion of those signals to its internal compartments.
  • Signal transduction is the process by which a cell translates a given signal or external stimulus into another signal or specific response.
  • First, a particular receptor on the cell's membrane or cytoplasm must be activated by a signaling molecule (also known as a ligand). transduction.
  • Ligand-receptor binding is extremely specific; it can be compared to a lock and key.
  • Second messengers are chemicals that enable intracellular signal amplification after a signal has been received.
  • A ligand's interaction to a receptor may result in the production of hundreds of second messenger molecules, which may then change thousands of effector molecules to cause a variety of reactions.
  • Signal transduction enables cells to perceive, interpret, and react to various environmental signals, enabling them to carry out their usual functions.

To learn more about signal transduction visit:

brainly.com/question/13989766

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7 0
1 year ago
Asasadasdasdasdasdasddasdasdasdasd
devlian [24]

Answer:

<em>n i c e :) </em>

i think its B.

Explanation:

7 0
1 year ago
What is a case called in which a person is harmed because of another person's actions or failure to act?
7nadin3 [17]

Answer:

Advance Directive

Explanation:

i do not know

8 0
3 years ago
If you were given the opportunity to study one of the toxins discussed in this lesson which one would you choose why
Sonja [21]

Answer:

If I could choose one of the toxins discussed in this lesson, I would choose cyanide poisoning because it can have an effect on a wide range of animals. It can affect grazing animals through poisonous trees and grasses, and household pets through various food items in our kitchens.

Explanation: hope it helps

6 0
2 years ago
Lymphatic organ that removes pathogens by filtering blood is the
Ksenya-84 [330]

Answer: Lymph node

Explanation:

The lymphatic system of the body works by filtering the blood and remove the harmful pathogen that is present in it.

There are several organs in the lymphatic system that works together at different sites in the body and helps body prevent and cure from infection.

Lymph nodes function to remove pathogen and debris from lymph and it is also referred as filters of lymph. The macrophages and dentritic cells kill the harmful pathogen in the blood.

Hence, the correct answer is option A

3 0
3 years ago
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