You forgot to put the options, but i believe it is magma.
Answer:
3 - Photoreceptors.
Explanation:
Photoreceptors are a sensor that is connected to your retina. They sense light and send the message to your brain. The sensors automatically squint your eyes if something will blind you.
The correct answer is 'photoreceptors'.
<u>Answer</u>:
The nucleus is primarily stores most of the cell's DNA.
<u>Explanation</u>:
It is made up of two chains which coils around each other, together they form a helical structure tat further carries the genetic information, which will help in the development, functioning and also the growth and reproduction in all known organism and in viruses. The nucleus is stored in it and the nucleus has the genetic material. They are composed of the nucleotides, in which each nucleotide has four nitrogen. These nucleotides are together joined with covalent bond to each other. Together they have the biological information.
<span>Well active transport absolutely moves substances against their concentration gradient (answer C), although I dislike how the other answers could probably be argued for. This seems to be a case of pick the "best" answer</span>
Because of the presence of both activation and inactivation gates, voltage-gated Na channels can be all of these.
- Sodium voltage-gated channels can be either closed, open, or inactive.
- Voltage-gated sodium channels are closed when at rest. Both an activation gate and an inactivation gate are present in voltage-gated sodium channels.
- Although the inactivation gate is open, the activation gate is closed. This conformation is closed but capable of opening. Some of the activation gates open as a result of membrane depolarization brought on by a stimulus.
- Both the activation and inactivation gates will be opened at this point. As sodium ions enter the cells, nearby activation gates will open.
- A greater amount of sodium will enter the cells as a result, initiating an action potential.
- Both gates open when certain depolarization thresholds are reached. Action potential increases to its maximum as sodium rushes into the cell.
- The inactivation gate will gradually close and the permeability of the membrane to sodium ions will decrease. The channel is now in a state known as "closed but not capable of opening."
- Up until the membrane potential reaches its resting state, this occurs. The channels once more assume the "closed but capable of opening" conformation when resting values are attained.
learn more about Na channels here: brainly.com/question/12977601
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