Playland

Waiting in line for the rides definitely affected my heart/breathing rate. As soon as I stepped in the line, my heart would instantly begin to race. I think this was caused by my brain signalling to my heart that I was beginning to feel anxious, which in turn increased my heart rate.

My heart rate definitely started to pick up and soon as I entered lines for rides that I've never been on, or were scared to go on. Rides like hells gate where I knew I would like it and was excited for it, made my heart race, but for a different reason than a ride like the wooden roller coaster which I know I was going to be scared on. On rides that I was nervous for, my hands would shake and I would almost feel dizzy and light-headed. But on rides like hells gate, my heart would beat from excitement.

Heart Dissection.

QUESTIONS:

1. Atria have thin muscular walls, blood enters them through a blood vessel and leave through a valve. Ventricles have thick muscular walls, blood enters them through a valve and leave through a blood vessel.The ventricles need to have thicker muscular walls because they have much further to pump the blood.

2. Arteries - transports oxygenated bloog from the heart (except in pulmonary artery which contains deoxygenated blood). Arteries have:

-thick muscular wall
-much elastic tissue
-small lumen relative to diameter
-not permeable
-valves in pulmonary artery and Aorta only
-blood under high pressure (10-16kPa)
-blood moves in pulses
-blood flows rapidly

Veins transport deoxygenated blood back to the heart (except in pulmonary vein which carries oxygenated blood)
-thin muscular wall
-little elastic tissue
-large lumen relative to diameter
-not capable of constriction
-not permeable
-valves throughout all veins
-blood under low pressure (1kPa)
-no pulses
-blood flows slowly

3. SEMILUNAR VALVES:

semilunar valves prevent the back flow of blood from the arteries to the ventricles

ATRIOVENTRICLE VALVES:

when going from the right atrium to the the right ventricle, it closes acting as a "wall" so that the pumped blood won't go back into the right atrium.The same when the blood goes from the left ventricule to the left atrium

4. What I found interesting about dissecting the heart was both how big and how small it was. Very contradicting, but I can explain. Firstly, at first glance I thought it was humongous. To think that was in a living creature was outstanding. That's in your body and you don't even think twice about it. Secondly, at closer inspection I thought it was actually kind of small. For the really big job it has, it seems really small. Which of course, it really isn't, but that was my initial reaction. 

Fetal Pig dissection.

It was interesting to see everything I saw on paper come to life. Although I felt bad for the pig it was cool to see the parts that we've learned about for so long in the flesh. It was also interesting to see the size of each parts. When we first opened up the fetus I first saw the liver and it was crazy to see how big it really was. I think this was a great hands on learning experience. 

What does engagement look like?

I know I'm a pretty shy person, and answering questions in class along with asking them isn't really my cup of tea. Regardless, I think engagement can be shown in several other ways. Listening and following along is a good example of what engagement looks like. I personally feel like I follow this thoroughly because if I am not asking questions, I am listening to them. Another prime example of being engaged came recently during our question box. I felt like that was a shy persons time to shine. I didn't have to say my question out loud, but wasn't denied finding out something I was wondering about. A third example of being engaged is doing the work. Even if you are participating in class that engagement might just end there. For me, doing the work is just a simple way of extending the participation beyond asking questions in class. Engagement is what you make it. 

Circulation Quiz Review

Compare the following:
 Pulmonary circulation concerns the right side of the body; it pumps blood to the lungs to get oxygen and gives off carbon dioxide. The arteries carry deoxygenated blood to the lungs, and veins carry oxygenated blood to the heart. Systemic circulation concerns the left side of the body; it pumps blood throughout your whole body. The artieries carry oxygenated blood to the whole body and the veins carry deoxygenated blood to the heart.

Arteries have a thicker wall (because they have a larger middle layer), and they have arteriole. Veins are larger in diameter, have a thinner wall and have venule and valves. Similarily, they both have 3 layers and the middle layer is a smooth tissue.

FETAL CIRCULATION

DUCTUS VENOSUS: ambillical vein attaches to vena cava
DUCTUS ARTERIOSIS: between pulmonary trunk and aorta-makes sure blood doesn't go into the lungs of the fetus.
FORAMEN OVALE: helps RA&LA - acts as lungs & digestive system for fetus

Brianna & Kamalvir - blood flow vid

Heart dissection

Inside yo body

Lympahtic System
Important part of your immune system.

Why do your lymph nodes swell?

First of all, what are the lymph nodes?
Lymph nodes are small glands throughout your body that transport nutrients and waste between body tissue and your bloodstream

Lymph nodes swell as a result of injuries, sickness (bacterial/viral infections) or tumors developing in/near a lymph node. Lymph nodes are filled with white blood cells called macrophages and lymphocytes. When you are ill, these cells get put into action to fight the disease, so they swell. As bacteria invades the nodes, they begin to feel hard, they inflame, and they may begin to hurt. It is easy to tell the problem based on what nodes are swollen.
For exmaple:

• Swollen nodes around the throat/underarms/groin: cold/flu
• Large, swollen nodes under the thorat and the jaw: mumps
• Glands above the collarbone: infection/tumour of lungs/breasts/neck/abdomen. 
• Etc, etc.

Exploring pH Lab: Picture Result

Respiration

This occurs within the respiratory system. During inpiration, the intercostal muscles contract, the diaphragm descends, and the rib cage rises. The thoracic cavity volume also increases, stretching the lungs. 

During expiration the intercostal muscles relax, the diaphragm rises, and the rib cage descends. The thoracic cavity volume decreases, causing the the lungs to recoil.

When you breathe in, the air moves into the lungs through the trachea or the windpipe then the pharynx and larynx. Then it branches into the bronchi, then bronchioles, which finally reach into each lung.

Lungs are cool

Lung growing inside of a man??:
It's has happened!
Read about it here: http://www.telegraph.co.uk/news/worldnews/europe/russia/5152953/Surgeons-find-fir-tree-growing-inside-patients-lung.html

Can you have an artificial lung?:
Yes!
Read about it here: http://en.wikipedia.org/wiki/Artificial_lung

What the heck is pneumonia?:
Pneumonia is a dangerous disease that makes it harder for your lungs to absorb oxygen from the air you breathe.

REALLY interesting facts about lungs:
Read about it here: http://prettywomandeb.wordpress.com/2010/10/14/10-fun-facts-about-your-lungs/

5 lung facts you probably do not know:
Read about it here: http://www.theasthmamom.com/2008/03/07/5-lung-facts-you-might-not-know/

Tuberculosis (What is it and what are the symptoms/causes)?:
Read about it here: http://www.lung.ca/diseases-maladies/tuberculosis-tuberculose/what-quoi/index_e.php

What happens when your lung fails?(causes and symptoms):
Read about it here: http://medical-dictionary.thefreedictionary.com/Lung+failure

Vital Capacity

VITAL CAPACITY.

1. Comparing my vital compactiy to Ashpreet, Monica and Kamalvir, there was a decent gap between ours. Me and Ashpreet got the same capacity, but Monica and Kamalvir's were significantly different. Monicas was almost a whole litre larger and Kamalvir's was almost a whole litre less. I think vital capacites can differ based on a person's activites. E.g, excercising, playing sports, playing instruments. Or even them in general, e.g, height, weight, and sex.

2. According to google, a usual breath is about 500mL, or half a litre. I think our breaths are the volume that they are because lungs are very strong and on average that is how much a person needs to survive.

3. During usual exhalation you're not letting out as much breath as you're capable of. Whereas with forcefully exhaling your breath, you're letting out as much as you are possibly capable of. When you're doing things like exercising/instrument playing/singing, you're exerting air forcefully and not as much as a normal person doing normal breathing would be.

Interim report

Up to this point in bio 12 I think there has been lots of successes. An example of a point where I felt successful was during class work. Being able to answer questions on worksheets and understand them is a nice feeling! I think my work habits are pretty good. I don't have unfinished work sheets in my binder because I always finish my work. Even if I'm talking with my friends I always manage to finish my work. Everyday I work collaboratively with other students. Mainly, my friends - working together everyday to finish our work. Also, with our digestive system project; I worked with Kamalvir and it was nice because I think doing projects is a good way to show your knowledge. It was also fun to work with a friend! Although, it's hard to state a goal without showing your true motives...I would be lying if I said getting a high mark isn't one of my goals. However, I can confidently say that it would be really nice and I would be really proud of myself if I got a good mark solely for the reason that science is not my strong suit. I know that I'm going to working harder 100% because I'm hoping to get into SFU. Overall, bio is and has been an interesting class and I'm looking forward to another term.

Biological Molecules and Food Lab

Lab Questions:

1. 

Positive results were shown in various ways during the 3 tests we conducted on Friday. For the test for lipids (fats), a positive result is shown as a grease stain on paper. With that test, the butter and cupcake showed to be positive. For the starch test, a positive result is shown as blackening of whatever you are testing. Positive foods were, bread, and the cupcake. For the simple sugar (glucose) test, positive results for glucose turned orange.






The building block of starch is glucose.

2.

The building blocks starch molecules are made up of are: glucose molecules. 

3. 

I think that Thomas and Josh achieved these results because carbohydrate molecules are pretty big and take more time to break apart. Since they left the substance in the water for longer, the carbohydrates were given more time to break apart. 

4. 

The death of an apple: Starting with the mouth, there is physical digestion. Your teeth break down your food while salivary amylase breaks it down. Your food is chewed and called a bolus. Using peristalsis, the food in moved through your esophagus, and into your stomach, passing through the cardiac sphincter. In your stomach you have HCl and pepsin, which turns into a substance called "chyme." The pancreas, liver, and gall bladder are accessory organs. The pancreas creates pancreatic juice with contains pancreatic amylase, lipase, trypsin, and sodium bicarbonate. Pancreatic amylase breaks down starch; trypsin breaks protein into peptides; lipase breaks down lipids into glycerol and fatty acids. The liver creates bile, and it is then stored in the gall bladder. Chyme enters the small intestine through the pyloric sphincter. The first 25 cm of the small intestine is called the duodenum, which creates small intestine juice. Bile is also released into the duodenum. The rest of the small intestine absorbs nutrients such as: glucose, amino acids, and fatty acids. Chyme continues through small intestine, and then reached large intestine. The large intestine absorbs H2O and contains bacteria E. Coli. Once through the large intestine, the Chyme turns into feces. Feces collect and stores in the rectum, and eventually releases into the world to be flushed down the toilet.

 

Amazing penny!

How many drops can break a penny? We determined it was 45...

Who What When Where Why...and sometimes How???

To be honest I took Bio 12 because I needed an academic...whoops. But Bio is probably the most interesting science (and the one that makes the most sense to me) so yay! And Mrs. Phillips rocks so who wouldn't want to take Bio 12 with her? Double yay! I'm probably the most excited to learn about our SYSTEMS! (nervous systems, reproductive systems...all that good stuff) Because they seem interesting...and i've been using them for 17 years and barely have a clue how they work...seriously though. My #1 question for this year: Where did people get that idea that hearts were shaped like that???