BIOLOGY COLLEGE

Which substance gives erythrocytes their color?

Answers

Answer 1
Answer:

Final answer:

Erythrocytes get their color from a pigment called hemoglobin, which contains iron.


Explanation:

Erythrocytes, also known as red blood cells, derive their color from a pigment called hemoglobin. Hemoglobin binds to oxygen and carries it to different parts of the body. It contains iron, which gives erythrocytes their red color.


Learn more about Erythrocytes' color here:

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7. HELP URGENT BEAINLYWhat does most cell division produce?

Answers

Answer:

There are two mitosis and meiosis.

An ordinary cell thunderstorm is aa.scattered or isolated storm that is not severe.
b.thunderstorm that does not produce lightning or thunder.
c.thunderstorm that does not produce hail.

Answers

The Answer is (A) Because a ordinary cell thunder storm is not severe  

3. Which of the following statements about exergonic (energy releasing) reactions is NOT true?a. They release energy

b. Glucose metabolism is an example

c. Their products have more energy than the reactants

d. There is a net energy loss

e. Bonds are broken

Answers

Answer:

d. There is a net energy loss

Although a fetus is relatively protected in its mother's womb, a number of different toxins can harm the fetus. These include lead, mercury, glycol ethers, and many other substances. How do toxins usually reach the developing fetus

Answers

Answer:

Although the blood of the fetus and the mother does not mix,  Simple diffusion across the membrane of the placenta occurs.And since diffusion is the movement of ions and gaseous molecules across the membrane from the higher concentration of the mother blood to the lower concentration of the fetus, toxic chemical are conveyed across.,

Explanation:

You are recording action potentials in a nerve cell in a petri dish in the laboratory. The only difference between your set up in the lab and the normal condition in the body is that the cell is now surrounded by a solution that has a lower concentration of sodium ions than normal. What are you most likely to observe? Group of answer choices The action potentials peak at a higher voltage than in the body There is no difference in the voltage at which the action potentials peak because all action potentials always reach the same voltage The action potentials peak at a lower voltage than in the body

Answers

Answer:

The correct answer is: The action potentials peak at a higher voltage than in the body.

Explanation:

Nerve cells in the human body have a very low sodium concentration inside them, while the liquid that surrounds them is rich in this particular ion. When sodium channels in the neuron's plasma membrane are opened, this big difference in sodium concentration -also called gradient- produces a big influx of sodium ions. This rapid entering of Na+ generates a change in the voltage of the cell, because sodium is positively-charged, meaning that the inside of the neuron will become less negative - this is commonly called depolarization of the membrane. Action potentials are generated because of the sudden spike in voltage, but for them to occur, there's a certain voltage that needs to be achieved, so not every depolarization will produce an action potential.

The fact that the cell in the lab is surrounded by a lower concentration of sodium means that the influx of Na+ ions will be lower, because the gradient won't be as big, but also means that the action potential will peak at a higher voltage because the resting membrane potential wasn't as negative to begin with.

What are two main abiotic factors that affect organisms in marine ecosystems? A. Oxygen level and water temperature B. Predators and competition C. Salinity and water temperature D. Predators and food availability

Answers

Answer:

dear user the answer is option A.oxygen level and water temperature and C.salinity and water temperature.

hope this helps

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Answer:

It would be A

Explanation:
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