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MatroZZZ [7]
3 years ago
7

Whats the difference between stimulus and stimuli?

Biology
1 answer:
AnnyKZ [126]3 years ago
3 0

Stimulus is anything that results in a response. It can be external or internal. Stimuli is the plural form of it. For example:

"There can be one stimulus in this article."

There can be 2 or more stimuli in this article."

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I need help with some HVI questions for my homework
Flauer [41]

Answer:

1. true

2. human immunodeficiency virus) is a virus that attacks the immune ... HIV is often spread by people who don't know they have it.

3 0
3 years ago
¿Cual de los siguientes solutos que pueden estar presentes en el liquido extracelular es transportado de acuerdo al modelo de me
kolezko [41]

Complete question:

¿Cual de los siguientes solutos que pueden estar presentes en el liquido extracelular es transportado de acuerdo al modelo de mecanismo propuesto en la ilustracion?

A) Etanol.

B) Calcio.

C) Glucosa.

D) Estrógeno.

E) Oxígeno.

<em>Nota: La ilustración se encuentra como un archivo adjunto.</em>

Answer:

Ión Calcio y Estrógeno son transportados por proteinas canal a traves de la membrana.      

Explanation:

Durante el paso de sustancias al interior o exterior de la celula ocurren dos tipos de transportes. Transporte activo y pasivo. El primero requiere de energia ya que se produce en contra de un gradiente electroquímico. El segundo, por otra parte, no requiere de energía ya que sucede a favor del gradiente electroquimico.

  • El transporte activo es mediado por proteinas transportadoras que actúan como bombas transportadoras.
  • El transporte pasivo puede ocurrir por
  1. difusión simple a traves de la bicapa lipídica (sin ningunaproteina que medie su paso),
  2. difusión facilitada a traves de proteinas canales (estas proteinas tienen forma de poro hidrofílico y permiten el paso de sustancias de un lado al otro de la membrana celular sin sufrir modificaciones. Permiten el pasaje de iones actuando como canales ionicos y de hormonas o neurotransmisores),  
  3. o difusión facilitada a través de proteinas transportadoras o carriers (estas proteinas son altamente selectivas y sufren un cambio temporal en su conformación al hacer pasar una sustancia de un lado al otro de la membrana plasmatica).    

<em>La ilustración adjuntada muestra un ejemplo de </em><em>proteina de canal</em><em> facilitando el transporte de distintas sustancias.</em>

A) Etanol.  Transporte pasivo. Difusión simple a traves de la bicapa lipídica.    

B) Ion Calcio, Ca²⁺.  Transporte pasivo. Difusión facilitada a traves de proteina canal.

C) Glucosa.  Transporte pasivo. Difusión facilitada a traves de proteina transportadora o carrier.

D) Estrógeno.  Transporte pasivo. Difusión facilitada a traves de proteina canal.

E) Oxígeno. Transporte pasivo. Difusión simple a traves de la bicapa lipídica.          

7 0
3 years ago
Which protein is responsible for unraveling the DNA double-helix into 2 strands to prepare it for copying?
mr Goodwill [35]

The answer is; DNA helicase

They unzip the double helix into single strands during replication. The unzipping occurs at regions called origins where replication is initiated. The protein breaks the hydrogen bonds (using energy from ATP) between the complimentary bases of the strands hence forming a replication fork.


6 0
3 years ago
Fred notices that all of his friend's brothers and sisters have dark hair. What is the most likely explanation for this characte
Ksenya-84 [330]

Answer:

They have identical genes.

Explanation:

Hope it helps

8 0
3 years ago
What is plant "blinking"? Why do plants do this?
Likurg_2 [28]

BLINK protein speeds up stomatal movements in response to light fluctuations resulting in improved plant growth and water use.

Plants can't move, so their “blinking” helps protect them from burning or bleaching when they are in bright sun.

I'm not sure if the first part is right, but I do know the second part is.  

3 0
3 years ago
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