during courtship, the male can actually stimulate the female into urinating so he can perform the...
Post on 19-Jan-2016
213 Views
Preview:
TRANSCRIPT
Do Now: Take out and Review
21 and 22
During courtship, the male can actually stimulate the female into urinating so he can perform the fertility taste test. If it is acceptable, the male attempts to mount her, though the female may not be completely receptive and try to evade the advances.
The females tend to vie for the attention of older, stronger males while they prefer younger females. If a female is being courted by a male who does not suit her standards, she will string him along while looking for a better specimen to mate with, or eventually give up and mate with the male she has.
Page 21
Page 22
Stem Cell ResearchPage 10 in the notes packet
What do you know about Stem Cell Research?Have you talked about it in other classes?
Unspecialized cells from which differentiated cells can develop
Stem cells are in adults, but are more potent in a fetus
Stem cells may be able to create all other cells in the body
Stem Cells
Aborted fetuses are not the only source of stem cells
There are stem cells in the both placenta and blood contained in the placenta. Also the primary source of stem cells is from blastocysts. These are fertilized human eggs that were not implanted into a woman.
Stem Cells
DO NOT COPY: After fertilization, the human embryo develops into a hollow ball of cells known as a blastocyst. The actual body of the embryo develops from the inner cells mass, a cluster of cells inside the blastocyst. Because of their ability to differentiate into each of the body’s many cell types, these cells are known as embryonic stem cells
Used for the investigation of basic cells which develop organisms
Cells are grown in a lab where tests are carried out
Stem Cells Research
Pros: Could lead to a better treatment or cure of:◦ Parkinson’s◦ Alzheimer’s◦ Heart diseases◦ Birth defects◦ Spinal cord injuries◦ Replace or repair
damaged organs◦ Stem cells may play a
major role in treating cancer
Cons:◦ “We should not
mess with human life.”
◦ “We should not play God.”
◦ Cloning humans?◦ Research can
destroy the embryo
Arguments For and Against Stem Cell Research
Possible Future Treatment for <3 Disease?
Quiz Tomorrow!
Homework: Page 301 – 302, 1 - 16
Do Now: Page 23, 24 and 28
top related