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maks197457 [2]
3 years ago
14

The pulmonary semilunar valve guards the entrance to the

Biology
1 answer:
cestrela7 [59]3 years ago
7 0

Answer:

<h2>pulmonary trunk</h2>

Explanation:

The pulmonary valve is an important semilunar valve and found in the heart between the pulmonary artery and the right ventricle. This valve contains three cups that are responsible for the guarding of the pulmonary trunk. The pulmonary trunk is an important vessel of the heart that arises from the right ventricle and plays an important role in the circulation of the deoxygenated blood. The pulmonary trunk is called the main pulmonary artery.

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How is a secondary immune response different from a primary immune response?
borishaifa [10]

Answer:

The secondary immune response is the immune response when the same antigen , memory cells that was encountered before is remembered and the immune system make antibodies to counter it.

Explanation:

There is a difference between the primary immune response and secondary immune response.

In the primary immune response occur when the immune system encountered an antigen for the first time which lead to the generation of memory cells and and the B cells with the T cells produce antibodies.

While the secondary immune response occur when the same antigen that was encountered the first time is encountered the second time and it lead to the stimulation of memory cells to produce more and high quantities of antibodies to fight foreign substances.

6 0
3 years ago
How does the teeth of afarensis compare to the teeth of the modern human?
vfiekz [6]
They were similar to modern humans in that they were bipedal (that is, they walked on two legs), but, like apes, they had small brains. Their canine teeth were smaller than those found in apes, and their cheek teeth were larger than those of modern humans.
7 0
2 years ago
Organelles such as mitochondria and the endoplasmic reticulum have membranes that compartmentalize reactions and other metabolic
tino4ka555 [31]

Answer:

The correct answer is - they both have highly folded membranes.

Explanation:

Organelles such as the endoplasmic reticulum, Golgi apparatus, and mitochondria have highly folded double membranes. This highly folded membrane provides the increased surface area in the organelle.

As the inner membrane of these organelles is the site for many chemical reactions the highly folded or layered membranes get more space for such reactions to occur due to increased surface area.

8 0
3 years ago
The pleural cavities and the pericardial cavity are located within which larger body cavity?
Colt1911 [192]

Answer:

its B. <em><u>thoracic</u></em><em><u> </u></em><em><u>cavity</u></em><em><u>.</u></em>

Explanation:

it is the ventral body chamber that contains the pericardial cavity (the heart) and the pleural cavity (the lungs).

7 0
3 years ago
Read 2 more answers
If the victim of a toxicologic emergency vomits, an emt should _________.
Stels [109]
<span>If the victim of a toxicologic emergency vomits, an emt should observe the vomitus for fragments of pills or look for other signs to properly care for the victim.</span>
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3 years ago
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