Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell...

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Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Transcript of Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell...

Page 1: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Warm-Up!!! 4/23Cell Cycle!

Label #s 1-5 and can you remember

what happens in S phase of the cell cycle?

Page 2: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Warm-Up!!! 4/23Cell Cycle!

1 – Prophase2 – Metaphase3 - Anaphase4 - Telophase5 - Cytokinesis

Page 3: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Warm-Up!!! 4/23Cell Cycle!

S Phase = DNA is

copied!!!

Page 4: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Warm-Up!!! 4/23Cell Cycle!

G1 = cell growth

G2 = cell prepares for division (mitosis)

Page 5: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Warm-Up!!! 4/23Cell Cycle!

Interphase = Any time cell

is not dividing!

Page 6: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Basics of the Human Body!!!

Page 7: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 8: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 9: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 10: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 11: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 12: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 13: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Levels of OrganizationThe levels of organization in the human

body are as follows:

CellsTissuesOrgans

Organ SystemsOrganism

Page 14: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Levels of OrganizationExample:

Cells -NeuronTissues -Nervous TissueOrgans -BrainOrgan Systems -Nervous SystemOrganism -Human

http://3.bp.blogspot.com/-Yt9-llLGraA/T0cwUuSVhMI/AAAAAAAAAP8/y0cdRnszkv0/s1600/cartoon-brain-1.gif
Page 15: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

HomeostasisEach cell in the human body is both an independent unit and a

part of a larger community.

Each of your 100 trillion cells must work together at all times to

keep the body functioning correctly.

Page 16: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Homeostasis

Short definition: the body’s ability to maintain a

constant internal environment despite external changes.

Page 17: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Homeostasis

For example: when you go outside on a really hot day

your internal body temperature does not rise –

the body takes action to keep you at a constant 98.6

degrees.

Page 18: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

HomeostasisThe body MUST always maintain

homeostasis or risk harm:

Homo = Same

Stasis = constant

Page 19: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Homeostasis

A perfect non-living example of homeostasis:

The air conditioner inyour house.

Page 20: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Homeostasis1. Air conditioner set at 75

degrees. 2. If the temp. warms to 76 a

sensor notes this and turns the air on.

3. When the sensor detects the temp has fallen back to 75 it shuts

the air off.4. A constant internal environment

has been kept.

Page 21: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

HomeostasisThis kind of response is called

Negative Feedback.

That is, when a systems pushes things in the opposite direction

in response to some kind of change.

Page 22: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Negative Feedback!

Page 23: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

HomeostasisThe body uses sorts of negative

feedback loops to maintain homeostasis.

Example: maintenance of a stable internal body

temperature.

Page 24: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

HomeostasisBody’s temperature sensor is the

Hypothalmus deep inside the brain.

So, the hypothalamus is probably part of which of the 11 body

systems?

Page 25: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?
Page 26: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Homeostasis:1. Body temperature drops to 97

degrees.2. Nerve cells of the hypothalamus

sense the temperature change.

3. Hypothalamus releases chemicals that tell muscle cells

to ‘shiver’ to create heat.

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Homeostasis:

4. Muscles produce heat that warms the body back to 98 degrees.

5. The nerve cells of the hypothalamus detects this

increase in temperature and stops releasing the chemical that tells

the muscles to shiver.

Page 28: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Negative Feedback!

Page 29: Warm-Up!!! 4/23 Cell Cycle! Label #s 1-5 and can you remember what happens in S phase of the cell cycle?

Conclustion:Using negative feedback loops the

body can keep its internal environment within very stable limits (we call this maintaining

homeostasis).

If this process is not working properly…..you have the potential

for some serious bodily harm.


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