1. How does your body get rid of wastes produced when you use Chemical Energy?
16.8—>16.11 Homework Packet
1. After school help Thursday.
2. Grades close on Friday, work due Friday 1pm.
3. You were given gradesheets with your current grade.
How are you going to study for the test
Starred thought of the Day
*To have something you’ve never had, you must do something you’ve never done.*
Today we reviewed for our Chapter 16 test, talking about the respiratory and excretory systems.
The major focus of our body is to obtain energy. We obtain energy through the digestive system, as well as through respiration. Respiration is the process of breathing, where we take in air through the mouth and nose, which goes down our pharynx and trachea to the lungs. The lungs contain alveoli, which look like bundles of grapes and where the gas exchange occurs. Capillaries pass through the alveoli, allowing this gas exchange.
What’s the reason the air goes in? Because a pressure differential is created between the outside air and space in your lungs. The diaphragm moves down, and rib muscles move out, causing a low air pressure in the lungs, and air rushes in.
You need oxygen for cell respiration to occur. Cell respiration produces ATP, the energy form which is usable by your cell organelles. The waste product produced during cellular respiration is carbon dioxide, which is the gas breathed out by the body.
The other system we are studying is the excretory system, which deals with the kidneys, urteter, urinary bladder, and urethra. This system is responsible for getting rid of waste by filtering the blood stream. Specifically, this system gets rid of many nitrogen-based wastes.
The excretory system has an important job of determining what is important and what is waste. It saves the items that can be reused by the body, but gets rid of those parts which it deems waste.
Here are some of the clicker questions we went over in class.
1. Cellular Respiration produces oxygen and energy.
b) False- Cellular respiration produces ATP and Carbon Dioxide!
2. Osmosis and diffusion follow concentration gradients, moving from lower concentration areas to higher concentration areas.
b) false- this is switched and describes active transport (going against a gradient) in it’s current state. Osmosis and diffusion follow concentration gradients from areas of higher concentration to those of a lower concentration.
3. How does the excretory system maintain homeostasis.
The excretory system has a major role of removing wastes toxic to the body. The excretory system has an important job of determining what is important and what is waste. It saves the items that can be reused by the body, but gets rid of those parts which it deems waste.
4. An issue with the third stage of respiration would result in what?
Oxygen would be unable to reach cells, so cell respiration would be unable to continue. Also, Carbon Dioxide would build up in cells, leading to acidic conditions.
5. How does the respiratory system maintain homeostasis?
The respiratory system provides your body with oxygen for cellular respiration, which powers all cellular processes. The respiratory system also removes wastes from cellular respiration.
Finish notes 16.8 through 16.11 (page 465 and goes to page 469) if you haven’t in class
Chapter 16 homework packet due Tuesday.