Monday, August 31, 2015

Red Blood Cells



  • Describe its structural characteristics (shape, size, location, etc.). Does it have all the same organelles of the typical eukaryotic cell? Red Blood play a huge role in the human body. For example red blood cells carry oxygen throughout the body. It's the oxygen that gives the blood its defining red color. The shape of a red blood cell is almost like a donut. Red Blood cells are also 6-8 µm and are located through out the body in the vessels and veins of the body. Blood cells do have the same organelles of typical eukaryotic cells too. 

  • Describe its function. What does it specialize in? Hemoglobin, the protein inside red blood cells  carries oxygen throughout your body. Red blood cells also remove carbon dioxide from your body, by transporting it into the lungs for you to exhale. Also a cool fact about Red blood cells is that they are made inside your bones, in the bone marrow and typically live for about 120 days.



  • Find pictures/diagrams of this cell. Illustration of blood components Illustration of bone marrow

  • What kind of tissue is this classified as? Red Blood cells are defined as connective tissue 


Sunday, August 30, 2015

Cell Specialization- Nerve Cells





  • A sketch of neuronal shapes by Santiago Ramon y Cajal

    • Find pictures/diagrams of this cell. 





    • Retinal cells taken from a mouse

    • Describe its structural characteristics (shape, size, location, etc.). Does it have all the same organelles of the typical eukaryotic cell? Nerve cells are cells that are found in the nervous system. Neurons (Nerve cells) have an outer membrane, a nucleus, and smaller structures called organelles that perform important functions. These cells also make up the Brain and the nervous system. And a cool trait about these cells to is that all of them look different from each other, meaning not one neuron looks alike. Cool, right! Neurons vary in size from 4 microns (.004 mm) to 100 microns (.1 mm) in diameter. Their length varies from a fraction of an inch to several feet. Also, a cool fact about Neurons is that the nerve cells transmit nerve signals to and from the brain at up to 200 mph. While variable in size and shape, all neurons have three parts. Dendrites receive information from another cell and transmit the message to the cell body. The cell body contains the nucleus, mitochondria and other organelles typical of eukaryotic cells. The axon conducts messages away from the cell body.

    • Describe its function. What does it specialize in? These cells are designed to stimulate other cells in the body in order to communicate. Neurons, a type of nerve cell, function by using electricity. Through electric messages, also known as action potential, neurons are able to take action in the cells they target.

    • What kind of tissue is this classified as? The nerve cells are in the Nervous System which makes it nervous tissue. 

    Wednesday, August 26, 2015

    Prepare for the Sweetness

    So today we had a sweetness lab. My partner and i tasted different kinds of Carbs such as Sucrose or even cellulos. ( SPOILER- cellulose didn't taste good). The Carbs we tasted were,
    Sucrose
    Glucose
    Fructose
    Galactose
    Maltose
    Lactose
    Starch
    Cellulose. The goal of the lab was to identify the structure of each carb and the function of it. For example, does it store energy or does it help living things, or does the carb taste sweet or not.
    - I would say the sweetest carbs were Sucrose, Glucose, and Frucrose. Not just because these are found in every sweet item or candy such as gummy bears, or marshmellos, but because there were less rings in the carbs. Basically, the lesser number of rings will be sweeter than a carb with more rings. Weird right.
    - Some foods that these sweet carbs are found in are potato chips, gummy bears, lolippops, chocolate, and even bread.... yes even bread as fructose to make it a little sweet. Ever notice the sweetness of white bread or that savory taste? well thats because of the high amount of fructose (sugar) in the bread. That is also why my mom chooses wheat bread over white bread. Because it's "healthier."
    - So people wonder what causes the human to taste "sweet" or "bitter" items. Well wonder no longer because a study at The Ohio State University has proven what causes the tongue to taste.  "Scientists at Ohio State University identified a chemical messenger in taste buds called cholecystokinin that tells the brain that something bitter is on the tongue, while a different chemical, neuropeptide Y, signals the brain that something sweet is being eaten." Below is a simple image of the tastebuds on our tongue and where we taste certain things. 


    Tongue