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ziro4ka [17]
3 years ago
7

How do substances get into and out of the cell?

Biology
1 answer:
viva [34]3 years ago
3 0

Answer:

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

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Please help me!!!!!!!
yaroslaw [1]

Answer:

YO YO YO YO

Explanation:

ITS TIME TO DRIVE YOUR CAN YOU WILL TRAVEL VERY FAR LEFT RIGHT FAST AND SLOW START ER UP ITS TIME TO GO

3 0
3 years ago
Identify 2 biotic limiting factors. Select two that apply.
Vikki [24]
B and d is the answer
4 0
3 years ago
Read 2 more answers
What specific event triggers the uncovering of the myosin binding site on actin?
Bess [88]
Striated muscles contain repeating sarcomeres of overlapping arrays of long, thin actin and thicker myosin filaments. Myosin filaments contains the myosin heads, which are enzymes that can bind to actin, split and make use of the energy from ATP. When muscle contraction starts, myosin heads bind to actin, change their configuration on actin, liberating the products of ATP hydrolysis and causing slide of the actin and myosin filaments. The action of the proteins troponin and  tropomyosin on the actin filaments regulates vertebrae striated muscle contraction. The release of calcium ions from the sarcoplasmic reticulum is triggered by the nervous stimulation which causes depolarization of muscle membrane. Calcium ions bind to troponin and thus cause or allow the tropomyosin strands on the actin filament to move so that the part of the actin surface where myosin heads need to bind is uncovered. Contraction then occurs and only stops when the sarcoplasmic reticulum pumps calcium out of the muscle interior.

So basically, what triggers the uncovering of the myosin binding site on actin is the calcium ions binding to troponin and changing configuration.
3 0
3 years ago
Célula vegetal en donde se encuentra
kompoz [17]

Respuesta:

Se encuentran en las hojas y llevan a cabo la fotosíntesis y la respiración celular, junto con otros procesos metabólicos.

Explicación:  

A menos que hables de una cierta parte de la célula vegetal (ejemplo: el cloroplasto o la pared celular) esta respuesta es correcta.

Por favor, da lo más inteligente

7 0
2 years ago
Where are the proteins of the electron transport chain in aerobic respirations located?
Elena L [17]
<span>The proteins of the electron transport chain are located in the inner membrane of the mitochondria.
Electrons are passed from one protein of the transport chain to another in a series of redox reactions, making the proton gradient which is then used to make ATP.</span>
5 0
3 years ago
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