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aleksklad [387]
3 years ago
5

Based on this key, which two fish have eyes located on either side of their head and are not spotted

Biology
1 answer:
Oksanka [162]3 years ago
5 0

Answer:glassy sweeper and squirrelfish

Explanation:neither are spotted and both have eyes on the sides of their head

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To see a general view of a microscope slide, use _____ power. If you need to see a more specific and detailed view, use _____ po
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Answer : Low;High

You use high power for a more detailed view on what you are looking at and you use the low power for a general view.
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An action potential involves potassium ions moving ________ the cell and sodium ions moving ________ the cell.
Alecsey [184]

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 (Na^+ ) outside than inside the neuron
  • more potassium ions (K^+ ) 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.

Learn more about action potential

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5 0
1 year ago
Vinblastine is a standard chemotherapeutic drug used to treat cancer. Because it interferes with the assembly of microtubules, i
Gnesinka [82]

Answer:

a. disruption of mitotic spindle formation.

Explanation:

Vinblastine is a chemotherapeutic drug which is used to restrict cancer cell proliferation. During metaphase, it binds to microtubular proteins which play a very important role in mitotic spindle formation. If spindles will not form then during anaphase, the sister chromatids will not separate and mitosis will not take place. This is how hyper-proliferative cancerous cells are controlled from dividing and cancer is treated using this drug.

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3 years ago
The adrenal medulla secretes epinephrine during sympathetic stimulation. Why epinephrine would increase the sympathetic response
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Answer: Because epinephrine activates the fight or flight response, related to the sympathethic response in the body.

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Catecholamines are dopamine, adrenaline, and noradrenaline (epinephrine and norepinephrine). Epinephrine prepares muscles, lungs, and heart for more intense activity, in situations of stress. It promotes the increase in the force of contraction in the muscles and increases in the heart rate. It also leads to increased blood pressure and bronchodilation, for greater availability of O2.

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3 years ago
Which organelles are called endosymbionts and why
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Two major types of organelle in eukaryotic cells, mitochondriaand plastids such aschloroplasts, originated as bacterial endosymbionts.
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