The innermost meninx that protects the brain and spinal cord is the ________

lorasvet [3.4K]

Los dasipódidos (Dasypodidae), conocidos comúnmente como armadillos, son una familia de mamíferos placentarios del orden Cingulata. Se caracterizan por poseer un caparazón dorsal formado por placas yuxtapuestas, ordenadas por lo general en filas transversales, con cola bastante larga y extremidades cortas.

6 0

3 years ago

If you have a sinus infection, many times you feel pressure in the check area. What is the regional term for this area?

nevsk [136]

Answer:

Thyroid

Explanation:

5 0

3 years ago

The role of DNA segment that do not code for proteins

Rus_ich [418]

Answer:

The non-coding regions of DNA are called introns. They are significant in evolution since they offer a great 'recipe' for recombination with genes/exons. Therefore, this offers variations among individuals on which natural selection could act upon to help a population adapt to changes in the environment. Introns also offer an additional step in gene regulation through the splicing of introns in making of mRNA.

3 0

3 years ago

The first stage of neural communication, _____, is the movement of the signal within a single neuron. _____ is the movement of a

9966 [12]

Answer:

The first stage of neural communication, conduction, is the movement of the signal within a single neuron. Transmission is the movement of a signal between neurons.

Explanation:

The neuron is the irreplaceable and highly specialized unit of the Nervous System, since it is the basic element in the conduction of the nerve impulse. The primary function of the neuron, conceived in its uniqueness, is to receive information and transmit it, once it has been processed.

The nerve impulse only spreads in one direction. When a neuron is stimulated, electrical changes originate that begin in the dendrites, pass through the neuronal body, and end in the axon, this is known as conduction. At the point where an axon and a dendrite are associated, it plays a very important role in the transmission of the impulse from one neuron to another and in the functioning and coordination of the nervous system in general, since the neurons do not act in isolation. The neurons are arranged in such a way that the axon endings of one are connected with the dendrites of the next neuron, but there is no physical contact itself, but a microscopic space that separates them, in addition there is a neurotransmitter substance that allows the flow of nerve impulse under those conditions, said substance is acetylcholine. These transmitting molecules diffuse through the synaptic cleft and chemically transfer the signal, from the axon of a neuron to the receptor neuron.

6 0

3 years ago

The diagram to the right represents the lytic What is occurring at step c

lilavasa [31]

Complete question:

The diagram to the right represents the lytic cycle. What is occurring at step C?

The pieces made in replication are assembled to complete the new virus particles.
The virus attaches to the host cell.
The host's DNA is disassembled and the virus takes over the cell's metabolic activity.
The new viral nucleic acid and viral proteins are replicated.
Lysis occurs, killing the cell.

Answer:

4. The new viral nucleic acid and viral proteins are replicated

Explanation:

During the lytic cycle, a host cell is infected by a virus. The infected cell dies by lysis of the cell membrane while the new copies of the virus are being released. The lytic cycle is the principal viral reproductive method and involves the destruction of the infected cells.

The lytic cycle is composed of five steps:

Attachment phase:

Viruses recognize specific receptors in the membrane of the host cells, where they get attached. These receptors are glycoproteins or lipoproteins that join viral elements and hold them on the host surface.

Penetration phase:

Viruses use different mechanisms to penetrate the host cells.

By injection, by perforating the host cell wall and membrane and injecting the genetic material through a hole. The rest of the virus remains outside the cell.
By endocytosis. The virus introduces by complete into the host cell by endocytosis of the membrane. Once inside, the virus breaks the vesicle membrane and gets in contact with the cytoplasm.
By fusing with the membrane
By going through the pores

Biosynthesis phase (replication and synthesis of the viral components)

There are no viral copies yet, but DNA, RNA, and proteins are being produced.

The host cell metabolism is used to synthesize viral elements. Viral nucleic acid uses the host cell nucleotides and RNA polymerase to synthesize mRNA and produce proteins and enzymes to destroy the infected cell DNA.

The viral nucleic acid duplicates and new proteins are produced.

Maturation phase

In this stage occurs the Assembling of the newly synthesized viral components. Many viral copies are formed.

Lysis phase

This is the moment in which the new viral copies get released. They break the host cell membrane by lysis through the action of the endolysin enzyme. Lysis produces the host cell death.

In the exposed diagram you can recognize

A) Attachment phase and penetration by injection phase

B) Biosynthesis phase → destruction of the host DNI. The host cell metabolism is used to synthesize viral elements

C) Biosynthesis phase → Viral components (nucleic acid + proteins) are already replicated.

D) Maturation and Lysis phase

E) Infection of a new host cell by attaching to its membrane

5 0

3 years ago

The innermost meninx that protects the brain and spinal cord is the _________.