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sergiy2304 [10]
3 years ago
9

What is the role of Langerhans cells?

Biology
2 answers:
stepladder [879]3 years ago
5 0
<span>They specialize in antigen presentation and belong to the skin immune system (SIS).</span>
Lerok [7]3 years ago
3 0
<span> They specialize in antigen presentation and belong to the skin immune system</span>
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Which of the following is not a major class of nutrients required by the human body?Select one:a. fiberb. carbohydratesc. protei
arlik [135]

Answer:

a. Fiber

Explanation:

The major nutrients required by humans in food are carbohydrates, proteins, fats, vitamins, and minerals. Our food also has dietary fibers and water. Dietary fibers or fibers are also known as roughage. Fibers are present mainly in plant products such as whole grains, pulses, fruits and vegetables. Fibers only add bulk and do not provide any nutrients to us. However, dietary fibers help the body get rid of undigested food.

8 0
3 years ago
If blood pressure is increased at the arterial baroreceptors, what would happen with the activity level of the parasympathetic n
lukranit [14]
<h2>PNS and SNS</h2>

Explanation:

Parasympathetic nervous  system (PNS)  

  • In the event that the blood pressure is increased because of any explanation, it is detected by the baroreceptor system
  • The baroreceptor reflex invigorates is the part of the parasympathetic nervous system
  • The PSNS causes reflation of veins, decreasing total peripheral resistance. It also decrease the heart rate

Sympathetic nervous system  (SNS)  

  • Heart rate and blood volume are regulated  by the interrelated activities of the sympathetic nervous system (SNS) and the renin-angiotensin-aldosterone system (RAAS)
  • The SNS is improperly dynamic in obesity and <em>hypertension</em> and plays a causal or permissive role in all types of chronic hypertension

3 0
3 years ago
Describe two things that would happen in an ecosystem if there were no unicellular organisms.
kobusy [5.1K]

Answer:

yeah

Explanation:

there would be a shortage of oxygen. Unicellular organisms include bacteria.

3 0
3 years ago
Which one of the following statements about the troposphere is
Dvinal [7]

Answer:

B. The tropospheric gases move becuase of convection currents.

Explanation:

The uneven heating of the regions of the troposphere by the sun ( the sun warms the air at the equator more than the air at the poles )causes convection currents, large-scale patterns of winds that move heat and moisture around the globe. In the Northern and Southern hemispheres, air rises along the equator and subpolar ( latitude about 50 to about 70 north and south ) climatic regions and sinks in the polar and subtropical regions. Air is deflected by the Earth's rotation as it moves between the poles and equator, creating belts of surface winds moving from east to west ( easterly winds ) in tropical and polar regions, the winds moving from west to east ( westerly winds ) in the middle latitudes. This global circulation is disrupted by the circular wind patterns of migrating high and low air pressure areas, plus locally abrupt changes in wind speed and direction known as turbulence.

6 0
3 years ago
What is the process by which light energy from the sun is converted to food
Mnenie [13.5K]
Photosynthesis If you are talking about plants they use photosynthesis
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3 years ago
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