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natima [27]
3 years ago
10

In order to maintain homeostasis, human cells must have a higher concentration of sodium ions outside the cell than inside the c

ell. In addition, the concentration of potassium ions must be higher inside the cell than outside the cell. Which of the following forms of cellular transportation helps human cells maintain a relatively constant sodium and potassium concentration?
A. osmosis B. endocytosis C. diffusion D. a cell membrane pump
Biology
2 answers:
Marrrta [24]3 years ago
8 0
Cell Membrane pump works to regulate the Sodium and Potassium. The channel will open and allow Sodium in while releasing Potassium.
AURORKA [14]3 years ago
8 0

Answer:

D. a cell membrane pump

Explanation:

What helps human cells maintain a relatively constant concentration of sodium and potassium is cell membrane pumps called sodium and potassium pumps.

Sodium potassium pump is a plasma membrane protein that uses energy ATP - Triphosphate Adenosine transforming into ADP - Adenosine Diphosphate to bring sodium (NA +) and potassium (K +) ions into the intracellular and extracellular environment consecutively. This whole process aims to maintain the balance of cells.

Extracellular medium has higher sodium concentration while intracellular medium has higher potassium concentration. To maintain cell equilibrium with maintaining concentrations, proteins capture sodium ions in the cytoplasm and pump them out of cells. Outside the cells proteins capture potassium ions by pumping into the cell.

With the responsibility for active and consecutive transport of sodium and potassium ions, the sodium and potassium pump is linked to some processes in the human body such as muscle contraction and nerve impulses, also facilitating amino acids and sugar. absorbed.

This equilibrium in potassium concentration in the intracellular medium is essential for protein synthesis beyond respiration and pumping sodium into the extracellular medium, allowing osmotic balance as well. It also maintains the concentration of water in the intracellular medium and the stability of cell volume.

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The invention of the electron microscope opened up many doors for biologists as it helped them to view and learn the appearance of cells and their sub-cellular structures

<h3>What is an electron microscope?</h3>

Electron microscope are microscopes which helps biologists to view the appearances of cells of organisms which cannot be seen with our nak -ed eyes.

Generally, electron microscopes:

  • Uses a beam of accelerated electrons as its source of illumination
  • Helps in obtaining high resolution images of biological and non-biological specimens.
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8 0
2 years ago
Which of the following statements BEST defines vestigial structures? :
ZanzabumX [31]

Answer:

Structures that are still present but currently serve little to no purpose

Explanation:

<em>Vestigial structures/organs are general defined as structures/organs that are present but poorly developed without any functional use in the present living organisms but thought to have been fully developed and functional in their ancestors.</em>

Fully developed and functional organs gradually become less developed and non-functional across generations as the environment keeps changing and organisms found lesser use for the organs. An example includes the <u>caudal vertebrae</u> found in man which is kind of useless but thought to have been fully developed and functional in the ancestors of man - the monkeys.

<u>Vestigial organs are often used as one of the morphological evidence of the evolution of living organisms.</u>

4 0
3 years ago
If someone could dig a safe tunnel through the earth how long would it take to free fall to the center?
Reptile [31]

Answer: A scenario often presented to introductory physics classes is that of a "gravity tunnel" — a tube drilled from one side of the Earth to the other through the planet's center. The answer taught for nearly a half-century for how long a fall through such a hole would take was about 42 minutes and 12 seconds.

Explanation: However, solar and lunar gravity, which also perturb orbiting satellites, would eventually pull you into the tunnel wall anyway [source: Darling ]. Strike a chord: Fun fact: A straight line from any point to any other point through the planet would take the same amount of time to fall through like a tunnel through Earth's center.

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2 years ago
How do this male peacocks feathers increases fitness?
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Answer:

Researchers also found that the longer a male's tail feathers, the faster he was able to shake them. This effort would require more muscular strength, and might be a powerful signal of fitness to the females.

Explanation:

6 0
3 years ago
On the lines provided, enter the name of the target organ(s) affected by the pituitary hormone indicated. Hypothalamic nerve cal
Dennis_Churaev [7]

Produced by the anterior pituitary. It's regarded as a tropical hormone. Target cells are impacted by tropical hormones indirectly after being stimulated.

<h3>The anterior pituitary gland affects which organs?</h3>

The following organs, glands, and bodily tissues are affected by and interact with the anterior pituitary hormones: organs, muscles, and bones the growth hormone (GH). Adrenocorticotropic hormone: Adrenal gland (ACTH). thyroid hormone, which stimulates the thyroid gland (TSH).

<h3>What are the anterior pituitary gland's seven hormones?</h3>

Frontal pituitary

hormone adrenocorticotrophic (ACTH)

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Luteinizing agent (LH)

hormone that stimulates ovulation (FSH)

Prolactin (PRL) (PRL)

hormonal growth (GH)

MSH, or melanocytic-stimulating hormone

Because it releases hormones that regulate the thyroid, adrenal glands, ovaries, and testes, the pituitary gland is frequently referred to as the "master gland."

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1 year ago
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