The large vacuole stores water and other materials for a plant cell
Explanation:
Prolactin is a protein hormone of the anterior pituitary gland that was originally named for its ability to promote lactation in response to the suckling stimulus of hungry young mammals.
Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy.
An action potential involves potassium ions moving <u>outside </u>the cell and sodium ions moving <u>inside </u>the cell.
<h3>how does it action potential work?</h3>
Neurons have a negative concentration gradient most of the time, meaning there are more positively charged ions outside than inside the cell. This regular state of a negative concentration gradient is called resting membrane potential. During the resting membrane potential there are:
- more sodium ions
outside than inside the neuron
- more potassium ions
inside than outside the neuron
The concentration of ions isn’t static though! Ions are flowing in and out of the neuron constantly as the ions try to equalize their concentrations. The cell however maintains a fairly consistent negative concentration gradient (between -40 to -90 millivolts). How?
- The neuron cell membrane is super permeable to potassium ions, and so lots of potassium leaks out of the neuron through potassium leakage channels (holes in the cell wall).
- The neuron cell membrane is partially permeable to sodium ions, so sodium atoms slowly leak into the neuron through sodium leakage channels.
- The cell wants to maintain a negative resting membrane potential, so it has a pump that pumps potassium back into the cell and pumps sodium out of the cell at the same time.
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The optic nerve swelling as it enters the eye through the optic disk is known medically as papilledema.
<h3>What results in eye papilledema?</h3>
Increased pressure from the brain and CSF on the optic nerve causes papilledema. The nerve swells as a result of the pressure as it enters the eyeball at the optic disc.
<h3>What causes papilledema most frequently?</h3>
The most frequent causes of papilledema without IIH were cerebral venous sinus thrombosis, intracranial tumor, and intracranial hemorrhage.
<h3>What occurs when a person has papilledema?</h3>
The following list of papilledema symptoms is possible: loss of vision or blurred vision The optic nerve, which regulates your vision, is subjected to physical pressure as a result. Blurred vision or visual loss in one or both eyes are common symptoms of optic nerve compression.
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Answer:Fossils are all throughout different rock layers. The oldest fossils are on top and the newest are at the bottom.
Explanation: there is a rich fossil record that shows the evolutionary transitions from horse ancestors to modern horses that document intermediate forms and a gradual adaptation o changing ecosystems.
