Biology (BIOL 235) BIO Assignment 1 - Unit 1 & 2 (BIO assignement one based on chapters 1 through 10 and both units 1 and 2)
Answer the following
... [Show More] short-answer questions.
1. Discuss the importance of body fluids and the one that is considered to be
the body’s internal environment.
Homeostasis in the body relies on the fluids which are in it. Body fluids are
dilute liquids which contain dissolved chemicals in the body, and all these
chemicals effect what our cells and tissues do. Fluids within a cell are
referred to as “intracellular,” and ones that are outside of a cell are
“extracellular.” If the body leaves homeostasis and has an influx of a
chemical or perhaps an electrolyte, either of these can enter the cells
within our bodies and cause damage and harm. Feedback systems within
the body can help to regulate and respond to changes in chemical
balances. Extracellular fluid which surround the cells is considered the
body’s internal environment.
2. Name the cavities of the trunk and the serous membranes that line them.
The trunk on the human body contains the thoracic, abdominal and pelvic
cavities.
1. Thoracic cavity: pleural and pericardial cavities and mediastinum.
2. Abdominopelvic cavity: Peritoneum
3. Describe the functions of water in the body. Explain why water molecules
have positive and negative “poles.”
Water accounts for about 2/3 of the weight in the body and plays a vital
role in maintaining its homeostasis. The polar covalent bonds that water
has allows it to dissolve many of the very important elements of life. The
positive and negative “poles” that water have allow it to attract oppositely
charged molecules to form different ions. This polarity allows it to be an
excellent solvent, and resist temperature changes. Because nearly all the
bodies’ chemical reactions occur in a watery substance, it is essential in
maintaining life and its associated functions.
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4. Define mixture and then distinguish between the three
types of mixtures called solutions, colloids, and
suspensions.
1. Mixture: a combination of elements or compounds that are
physically mixed but not bonded by chemical bonds. For example, if
you poured 1 cup of sand and one cup of [Show Less]