All categories

3 years ago

Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier?

Biology

1 answer:

NISA [10]3 years ago

3 0

Answer:

Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier? D) Inducing TNF

Explanation:

The blood brain barrier is a barrier formed by brain microvascular endothelial cells, astrocytes and pericytes. Pathogens can cross this barrier by using different mechanisms. The Tumor Necrosis Factor (TNF) is the way gram-negative bacteria cross this mentioned blood-brain barrier.

You might be interested in

The Monterey pine and the Bishop's pine inhabit some of the same areas of central California. The Monterey pine releases pollen

Naddik [55]

Answer:

The Monterey pine and the Bishop's pine inhabit some of the same areas of central California. The Monterey pine releases pollen in February, while the Bishop's pine does so in April. This is an example of temporal isolation.

Explanation:

Temporal isolation is a form of reproductive isolation in which two or more species reproduce at two separate times.

For example: Northern america leapord frog mates in April and North America Bullfrog mates in july.

As in the given scenario, reproductive isolation is occuring in which two species (Monterey pine and Bishop's pine) are reproducing (producing pollens) at two separate times(February and April). Hence it is an example of temporal isolation.

3 0

3 years ago

IF most of the energy we use on earth comes from the sun –how does that energy (light and thermal) end up

____ [38]

Answer:

1: Chemical Energy

2: Kinetic Energy

3: Electrical Energy

4: Mechanical Energy

Explanation:

1: The energy held in food is called chemical energy. It is a form of potential energy held within chemical bonds between atoms.

2: When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.

3: The power for lights and stuff is Electrical Energy, ofc :]

4: The chemical energy in the food gets changed into the mechanical energy of moving muscles.

Hope this helps!! :D

5 0

3 years ago

Define magma ? How do scientists study about the interior of the earth

earnstyle [38]

Answer:

hey army

Explanation:

love nctzen

6 0

3 years ago

An alpha helix or a beta-pleated sheet are examples of what level of protein structure?

weqwewe [10]

Answer:

Secondary level of protein structure

Explanation:

The proteins are formed of the monomer units called amino acids which bond with each other via peptide bond and form a linear peptide structure called the primary level structure of the protein.

The proteins to perform several functions in a cell undergoes structural conformation and attain the helical form called alpha helix due to the involvement of alpha carbon in bond formation and a pleated sheet called beta-pleated sheet due to the involvement of beta carbon. These structures are known as a secondary level of protein structure.

Thus, a Secondary level of protein structure is the correct answer.

4 0

3 years ago

Read 2 more answers

Who is well known for studying the mammoth and mastodon?

Ksju [112]

Charles Wilson Peale I believe.

6 0

3 years ago