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anonymous

  • one year ago

how do capillaries resist transport of molecules into the brain? A. cells lack intercellular pores B. brain cell membranes resist diffusion C. inter cranial cells lack mechanisms of active transport D. endothelial cells are connected by tight junctions. There is more than one answer

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  1. anonymous
    • one year ago
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    @RamiroCruzo @toxicsugar22 @Rushwr

  2. RamiroCruzo
    • one year ago
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    The blood–brain barrier (BBB) is a highly selective permeability barrier that separates the circulating blood from the brain extracellular fluid (BECF) in the central nervous system (CNS). The blood–brain barrier occurs along all capillaries and consists of tight junctions around the capillaries. Tight junctions encircle the cell and attach it tightly to its neighbors, these junctions act as a barrier preventing molecules from diffusing across an epithelial sheet between adjacent cells. Tight Junctions have numerous small circular pores. So, now your correct options should be: B. brain cell membranes resist diffusion D. endothelial cells are connected by tight junctions.

  3. RamiroCruzo
    • one year ago
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    @fflloowweerrchilldd ???

  4. anonymous
    • one year ago
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    thank you so much. can i ask you more questions?

  5. RamiroCruzo
    • one year ago
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    Any time ;)

  6. anonymous
    • one year ago
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    heart contractions result from the electrical coordination of cardiac muscles through? A. somatic motor neurons B. autonomic sensory neurons C.gap junctions

  7. RamiroCruzo
    • one year ago
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    Autonomic sensory neurons

  8. shreehari499
    • one year ago
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    Happy to see u help @RamiroCruzo ...could you please attach a sufficient reason along with your answer? Thank you!

  9. RamiroCruzo
    • one year ago
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    Oki Doki....... @shreehari499

  10. Rushwr
    • one year ago
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    I'll explain as I know. Gap junctions are specialized intercellular connections. They allows various ions, molecules and electric impulses to directly pass through a regulated gate between cells. So we can take that answer out. So we are left with autonomic and somatic neurons.

  11. Rushwr
    • one year ago
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    So that leads us to choose autonomic motor neuron.

  12. Rushwr
    • one year ago
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    Just think if we were left with somatic motor neuron and the autonomic motor neuron. Still we should go with the autonomic motor neuron

  13. Rushwr
    • one year ago
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    somatic motor neurons transmits signals to voluntary muscles like striated muscles. autonomic motor neuron transmits to involuntary muscles like smooth and cardiac muscles and glands.

  14. Rushwr
    • one year ago
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    Did u get it @fflloowweerrchilldd and @toxicsugar22

  15. anonymous
    • one year ago
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    yeah but thats not the correct answer according to my test

  16. Rushwr
    • one year ago
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    hmm wait try gap junctions then because they allow the transmit of electrical pulses through various photos.

  17. Rushwr
    • one year ago
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    gates not photos lol sorry about that.

  18. anonymous
    • one year ago
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    okay thank you!

  19. anonymous
    • one year ago
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    do you mind if i ask any more questions?

  20. Rushwr
    • one year ago
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    yeah yeah

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