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Author Question: A transport mechanism that can move a substance against a concentration gradient by using cellular ... (Read 75 times)

nautica902

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on: Feb 27, 2019
A transport mechanism that can move a substance against a concentration gradient by using cellular energy is
 A) simple diffusion.
  B) facilitated diffusion.
  C) osmosis.
  D) bulk transport.
  E) active transport.

Question 2

Contractions of the papillary muscles
 A) close the atrioventricular valves.
  B) close the semilunar valves.
  C) eject blood from the ventricles.
  D) prevent the atrioventricular valves from reversing into the atria.
  E) eject blood from the atria into the ventricles.


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ApricotDream

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Reply #1 on: Feb 27, 2019
Answer to Question 1

E

Answer to Question 2

D


nautica902

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Reply 2 on: Feb 27, 2019
Gracias!

cdmart10

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Reply 3 on: Yesterday
Excellent

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