BIOS 255 Comprehensive Exam
What is homeostasis? - ANS maintenance of a stable internal environment with the contribution
of all organ systems
What are the components of a homeostatic mechanism? - ANS -Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? - ANS Body REVERSES, or goes against, an
original stimulus to return to homeostasis
Example: Blood glucose regulation after eating.
What is a positive feedback mechanism? - ANS Amplifies the change from the normal level.
(Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? - ANS negative
Inferior - ANS Below; at a lower level
Superior - ANS Above; higher level
Lateral - ANS Side; Away from the midline of the body
Proximal - ANS Closer to the point of attachment
Distal - ANS Father away from the point of attachment
Medial - ANS Toward the midline of the body
Sagittal - ANS divides body into left and right
Transverse - ANS Divides body into upper and lower parts
Anterior - ANS toward the front of the body
Posterior - ANS toward the back of the body
, Frontal plane - ANS Divides the body into anterior (front) and posterior (back) portions.
Which part of the atom is involved in chemical reactions? - ANS Electrons
Which part of the atom makes up the atomic number? - ANS Protons
pH scale - ANS Measurement of hydrogen ion concentration
- pH < 7: Acidic
-pH > 7: Alkaline (basic)
-pH = 7: neutral
What is the main function on rough endoplasmic reticulum? - ANS Protein synthesis
What kind of cell division results in a diploid, increasing the number of cells? - ANS Mitosis
How many pairs of chromosomes do humans have? - ANS 23 pairs
What kind of cell division results in a haploid? - ANS Meiosis
Meiosis I - ANS Splits genetic material in half, producing a diploid
Meiosis II - ANS Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase - ANS Chromosomes become visible, nuclear envelope dissolves, spindle forms
Metaphase - ANS Chromosomes line up in the middle of the cell
Anaphase - ANS Chromosomes separate and move to opposite ends of the cell
Telophase - ANS Chromosomes move to opposite ends of the cell and two nuclei are formed.
What are the 4 types of tissues? - ANS epithelial, connective, muscle, nervous
What are the properties of epithelial tissue? - ANS -Cells sit on basement membrane
-Has apical surface and basal surface
-Avascular
-Polarity
-Innervated
What occurs when the apical surface of epithelial cells separate from the basement layer? -
ANS Cell regeneration is triggered.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller LECTDERRICK. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
