BIOS 255 Comprehensive Exam || with Authenticated
Answers.
What is homeostasis? correct answers maintenance of a stable internal environment with the
contribution of all organ systems
What are the components of a homeostatic mechanism? correct answers -Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? correct answers Body REVERSES, or goes against, an
original stimulus to return to homeostasis
Example: Blood glucose regulation after eating.
What is a positive feedback mechanism? correct answers Amplifies the change from the normal
level. (Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? correct answers negative
Inferior correct answers Below; at a lower level
Superior correct answers Above; higher level
Lateral correct answers Side; Away from the midline of the body
Proximal correct answers Closer to the point of attachment
Distal correct answers Father away from the point of attachment
Medial correct answers Toward the midline of the body
Sagittal correct answers divides body into left and right
Transverse correct answers Divides body into upper and lower parts
Anterior correct answers toward the front of the body
Posterior correct answers toward the back of the body
Frontal plane correct answers Divides the body into anterior (front) and posterior (back) portions.
Which part of the atom is involved in chemical reactions? correct answers Electrons
, Which part of the atom makes up the atomic number? correct answers Protons
pH scale correct answers Measurement of hydrogen ion concentration
- pH < 7: Acidic
-pH > 7: Alkaline (basic)
-pH = 7: neutral
What is the main function on rough endoplasmic reticulum? correct answers Protein synthesis
What kind of cell division results in a diploid, increasing the number of cells? correct answers
Mitosis
How many pairs of chromosomes do humans have? correct answers 23 pairs
What kind of cell division results in a haploid? correct answers Meiosis
Meiosis I correct answers Splits genetic material in half, producing a diploid
Meiosis II correct answers Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase correct answers Chromosomes become visible, nuclear envelope dissolves, spindle
forms
Metaphase correct answers Chromosomes line up in the middle of the cell
Anaphase correct answers Chromosomes separate and move to opposite ends of the cell
Telophase correct answers Chromosomes move to opposite ends of the cell and two nuclei are
formed.
What are the 4 types of tissues? correct answers epithelial, connective, muscle, nervous
What are the properties of epithelial tissue? correct answers -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? correct
answers Cell regeneration is triggered.
Where can simple squamous epithelium be found? correct answers heart, blood vessels, kidneys,
lungs
Answers.
What is homeostasis? correct answers maintenance of a stable internal environment with the
contribution of all organ systems
What are the components of a homeostatic mechanism? correct answers -Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? correct answers Body REVERSES, or goes against, an
original stimulus to return to homeostasis
Example: Blood glucose regulation after eating.
What is a positive feedback mechanism? correct answers Amplifies the change from the normal
level. (Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? correct answers negative
Inferior correct answers Below; at a lower level
Superior correct answers Above; higher level
Lateral correct answers Side; Away from the midline of the body
Proximal correct answers Closer to the point of attachment
Distal correct answers Father away from the point of attachment
Medial correct answers Toward the midline of the body
Sagittal correct answers divides body into left and right
Transverse correct answers Divides body into upper and lower parts
Anterior correct answers toward the front of the body
Posterior correct answers toward the back of the body
Frontal plane correct answers Divides the body into anterior (front) and posterior (back) portions.
Which part of the atom is involved in chemical reactions? correct answers Electrons
, Which part of the atom makes up the atomic number? correct answers Protons
pH scale correct answers Measurement of hydrogen ion concentration
- pH < 7: Acidic
-pH > 7: Alkaline (basic)
-pH = 7: neutral
What is the main function on rough endoplasmic reticulum? correct answers Protein synthesis
What kind of cell division results in a diploid, increasing the number of cells? correct answers
Mitosis
How many pairs of chromosomes do humans have? correct answers 23 pairs
What kind of cell division results in a haploid? correct answers Meiosis
Meiosis I correct answers Splits genetic material in half, producing a diploid
Meiosis II correct answers Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase correct answers Chromosomes become visible, nuclear envelope dissolves, spindle
forms
Metaphase correct answers Chromosomes line up in the middle of the cell
Anaphase correct answers Chromosomes separate and move to opposite ends of the cell
Telophase correct answers Chromosomes move to opposite ends of the cell and two nuclei are
formed.
What are the 4 types of tissues? correct answers epithelial, connective, muscle, nervous
What are the properties of epithelial tissue? correct answers -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? correct
answers Cell regeneration is triggered.
Where can simple squamous epithelium be found? correct answers heart, blood vessels, kidneys,
lungs
