Question: During fertilization in sea urchins, Steinhardt and his
colleagues observed that the sperm-induce…
During fertilization in sea urchins, Steinhardt and his
colleagues observed that the sperm-induced rise in cytoplasmic
Ca2+concentration correlates with the formation of the
fertilization envelope, which blocks fusion of other sperm with the
egg. Look at the image below to review the terms. Note that the
vitelline layer is sometimes called the vitelline
envelope.
Show transcribed image text Part B – Experimental results: Cytoplasmic Ca2+ concentration and the fertilization envelope During fertilization in sea urchins, Steinhardt and his colleagues observed that the sperm-induced rise in cytoplasmic Ca2 concentration correlates with the formation of the fertilization envelope, which blocks fusion of other sperm with the egg. Look at the image below to review the terms. Note that the vitelline layer is sometimes called the vitelline envelope jelly coat sperm-binding receptors unfertilized egg fertilized egg vitelline layer fertilization envelope perivitelline space egg plasma membrane cortical granules egg cytoplasm plasma membrane Adapted from Biology by Campbell and Reece Pearson Education, Inc. An increase in the concentration of Ca2 in the egg's cytoplasm triggers what is called the cortical reaction. In this activity, you will place the events of the cortical reaction in the correct sequence
Part B – Experimental results: Cytoplasmic Ca2+ concentration and the fertilization envelope During fertilization in sea urchins, Steinhardt and his colleagues observed that the sperm-induced rise in cytoplasmic Ca2 concentration correlates with the formation of the fertilization envelope, which blocks fusion of other sperm with the egg. Look at the image below to review the terms. Note that the vitelline layer is sometimes called the vitelline envelope jelly coat sperm-binding receptors unfertilized egg fertilized egg vitelline layer fertilization envelope perivitelline space egg plasma membrane cortical granules egg cytoplasm plasma membrane Adapted from Biology by Campbell and Reece Pearson Education, Inc. An increase in the concentration of Ca2 in the egg's cytoplasm triggers what is called the cortical reaction. In this activity, you will place the events of the cortical reaction in the correct sequence
