BIOS 255 COMPREHENSIVE EXAM
QUESTIONS AND ANSWERS 100%
VERIFIED.
What is homeostasis? - correct answer. maintenance of a stable internal environment
with the contribution of all organ systems
What are the components of a homeostatic mechanism? - correct answer. -Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? - correct answer. 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 answer. Amplifies the change from
the normal level. (Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? - correct answer. negative
Inferior - correct answer. Below; at a lower level
Superior - correct answer. Above; higher level
Lateral - correct answer. Side; Away from the midline of the body
Proximal - correct answer. Closer to the point of attachment
Distal - correct answer. Father away from the point of attachment
Medial - correct answer. Toward the midline of the body
Sagittal - correct answer. divides body into left and right
, Transverse - correct answer. Divides body into upper and lower parts
Anterior - correct answer. toward the front of the body
Posterior - correct answer. toward the back of the body
Frontal plane - correct answer. Divides the body into anterior (front) and posterior
(back) portions.
Which part of the atom is involved in chemical reactions? - correct answer. Electrons
Which part of the atom makes up the atomic number? - correct answer. Protons
pH scale - correct answer. 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 answer. Protein
synthesis
What kind of cell division results in a diploid, increasing the number of cells? - correct
answer. Mitosis
How many pairs of chromosomes do humans have? - correct answer. 23 pairs
What kind of cell division results in a haploid? - correct answer. Meiosis
Meiosis I - correct answer. Splits genetic material in half, producing a diploid
Meiosis II - correct answer. Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase - correct answer. Chromosomes become visible, nuclear envelope
dissolves, spindle forms
Metaphase - correct answer. Chromosomes line up in the middle of the cell
Anaphase - correct answer. Chromosomes separate and move to opposite ends of
the cell
Telophase - correct answer. Chromosomes move to opposite ends of the cell and two
nuclei are formed.
QUESTIONS AND ANSWERS 100%
VERIFIED.
What is homeostasis? - correct answer. maintenance of a stable internal environment
with the contribution of all organ systems
What are the components of a homeostatic mechanism? - correct answer. -Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? - correct answer. 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 answer. Amplifies the change from
the normal level. (Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? - correct answer. negative
Inferior - correct answer. Below; at a lower level
Superior - correct answer. Above; higher level
Lateral - correct answer. Side; Away from the midline of the body
Proximal - correct answer. Closer to the point of attachment
Distal - correct answer. Father away from the point of attachment
Medial - correct answer. Toward the midline of the body
Sagittal - correct answer. divides body into left and right
, Transverse - correct answer. Divides body into upper and lower parts
Anterior - correct answer. toward the front of the body
Posterior - correct answer. toward the back of the body
Frontal plane - correct answer. Divides the body into anterior (front) and posterior
(back) portions.
Which part of the atom is involved in chemical reactions? - correct answer. Electrons
Which part of the atom makes up the atomic number? - correct answer. Protons
pH scale - correct answer. 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 answer. Protein
synthesis
What kind of cell division results in a diploid, increasing the number of cells? - correct
answer. Mitosis
How many pairs of chromosomes do humans have? - correct answer. 23 pairs
What kind of cell division results in a haploid? - correct answer. Meiosis
Meiosis I - correct answer. Splits genetic material in half, producing a diploid
Meiosis II - correct answer. Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase - correct answer. Chromosomes become visible, nuclear envelope
dissolves, spindle forms
Metaphase - correct answer. Chromosomes line up in the middle of the cell
Anaphase - correct answer. Chromosomes separate and move to opposite ends of
the cell
Telophase - correct answer. Chromosomes move to opposite ends of the cell and two
nuclei are formed.
