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dalvyx [7]
3 years ago
14

The primary purpose of heart valves is to

Health
2 answers:
Umnica [9.8K]3 years ago
8 0

Answer:

A

Explanation:

i'm not sure but i think it is A

Svet_ta [14]3 years ago
8 0

Answer:

prevent blood from flowing backward

Explanation:

think of the heart as the panama canal. There are four chambers, the atria and the ventricles. It goes from right atrium to right ventricle, and then to the lungs, where it gets oxygen, and then into the left atrium and finally into the left ventricle which pumps the blood through the aorta into the systemic circulation. Valves prevent backflow of the blood, they open and close at difference stages of the heart cycle.

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Listeria monocytogenes pathogenesis is directly related to its ability toA) produce a powerful toxinB) form endosporesC) produce
vfiekz [6]

Answer:

A and E

Explanation:

<em>Listeria monocytogenes</em> is a Gram-positive bacterium, mobile by means of flagella. CANNOT form capsules and / or endospores; It is a pathogenic bacterium, normally present in the environment. It is capable of living both in the soil and in the cytosol of a eukaryotic cell.

<em>L. monocytogenes</em> can enter host cells through endocytosis, this phagocytic vacuole is rapidly lysed by the listeriolysin O (LLO) toxin produced by the bacteria. Once free in the cytosol, it expresses the genes to acquire the necessary nutrients for intracellular multiplication and spread between cells and this is precisely what allows it to evade the humoral immune response.

8 0
3 years ago
What are some characteristics of development
11111nata11111 [884]

Answer:

High population growth rate/size.

High rates of unemployment.

Explanation:

3 0
4 years ago
Which legal punishments could occur if a person is found to be driving while under the influence of alcohol? Check all that appl
tiny-mole [99]
It would depend if the drunken driver was in school or not
5 0
3 years ago
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Jolie is a sociologist interested in studying how the average woman's health outcomes are likely to change as she ages. What the
saveliy_v [14]

Answer:

the life course perspective

Explanation:

It is the approach that addresses the moments of the continuum of life and recognizes that human development and health outcomes depend on the interaction of different factors throughout the course of life, on cumulative experiences and present situations of each individual influenced by the family, social, economic, environmental and cultural context; understanding that investing in timely care in each generation will have an impact on the following ones and that the greatest benefit of a vital moment can be derived from interventions made in an earlier period.

The life course approach constitutes a qualitative leap, with respect to the life cycle, since it covers the entire life cycle, and also “recognizes the existence of critical periods of growth and development at all stages of life,” in which exposure to certain environmental factors may be more harmful to health and affect the long-term health potential more than at other times in life, ”impacting the subjects' life trajectories. While the life cycle, refers to the development in stages that gives a linear idea of ​​the process, in contrast to the vision of the life course approach that assumes the development as a vital process that is built throughout life and affects both in the lives of subjects and families.

3 0
3 years ago
The ONLY sure way to prevent pregnancy is by continuous abstinence.
diamong [38]

Answer:

then is true

Explanation:

Abstinence is the only way to always prevents pregnancy.

8 0
3 years ago
Read 2 more answers
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