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fredd [130]
3 years ago
7

Explain how an immune response starts after a macrophage attacks a pathogen.

Biology
1 answer:
a_sh-v [17]3 years ago
3 0
After the macrophage fails the Helper T Cell stimulates the B cells (create antibodies) if pathogen is extracellular and Cytotoxic T Cells (killer T cells, release perforin) if pathogen is intracellular. Once the pathogen is killed the B Cells create Memory B Cells and the Killer T Cells create memory T Cells. 
<span>Hope that's helpful.</span>
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Select the correct answers. Meningitis is the inflammation of the protective covering of the meninges. Which organs would be aff
Usimov [2.4K]

Answer:

Brain and spinal cord

Explanation:

Meningitis is the inflammation of the protective covering of the meninges, the three membranes covering the brain and spinal cord. Meningitis usually occurs from a viral infection, but may sometimes result from a bacterial or fungal infection, cancer or drug allergies.

Viral and bacterial meningitis may be contagious and can be transmitted through coughing and sneezing.

Symptoms of meningitis include:

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Treatment is by vaccination, use of antibiotics and antifungal agents.

6 0
3 years ago
In order to be classified as a green plant, an organism should be eukaryotic, have double-membraned chloroplasts, cell walls, an
Eduardwww [97]

Answer:

photosynthesis

green algae

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xylem

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a

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Early land plants like mosses did not have vascular tissue. They must absorb their water directly from their surroundings, such as growing on rocks or trees that are moist. You find mosses in damp areas for this reason. They cannot grow in drier climates because they cannot pull water from the ground like vascular plants. Ferns are also suited to reproduce in more moist/humid climates because water must be present for their gametes (sperm and eggs) to find one another for fertilization. Seeds are adaptations by angiosperms and gymnosperms that allow for waterless fertilization. Either wind or animal pollinators help spread pollen and help the sperm reach egg cells for fertilization to occur. For that reason, these plants are better suited to survive in drier, modern climates.

Explanation:

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7 0
3 years ago
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Which correctly compares how coal and natural gas are formed?
AVprozaik [17]
Natural gas made due to pressure and under buried layers of rock over millions of years ago
3 0
3 years ago
Which of the following is NOT evidence for Endosymbiotic Theory?​
ivann1987 [24]

Answer:

mitochondria and chloroplasts can not survive outside of the cell

Explanation:

7 0
3 years ago
In a science class students water a plant with the same amount of water each day for 28 consecutive days if the students use a t
Phantasy [73]

Answer:

The correct answer would be 0.85 liters.

It can be explained with the help of unit rate that is, when the rate is expressed as the quantity of 1 for example, 5 meter per second, 5 liters per day et cetera.

In this case, unit rate (liter per day) can be calculated by dividing the total amount of water used by total number of days.

Amount of water used in 28 days = 23.8 liters

The amount of water used in one day = \frac{23.8}{28}

It comes out to be 0.85 liters per day or 850 milliliter per day.

4 0
3 years ago
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