COMPREHENSIVE EXAM BIOS255 LATEST 2024-2025 WITH
ACTUAL QUESTIONS AND CORRECT VERIFIED ANSWERS
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What is homeostasis? - ANSWER-maintenance of a stable internal environment
with the contribution of all organ systems
What are the components of a homeostatic mechanism? - ANSWER--Stimulus
-Receptors
-Control center
-Effector
-Response
What is a negative feedback mechanism? - 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? - ANSWER-Amplifies the change from
the normal level. (Agrees with the change)
Example: Childbirth, blood clotting
What feedback mechanism is most common? - ANSWER-negative
,Inferior - ANSWER-Below; at a lower level
Superior - ANSWER-Above; higher level
Lateral - ANSWER-Side; Away from the midline of the body
Proximal - ANSWER-Closer to the point of attachment
Distal - ANSWER-Father away from the point of attachment
Medial - ANSWER-Toward the midline of the body
Sagittal - ANSWER-divides body into left and right
Transverse - ANSWER-Divides body into upper and lower parts
Anterior - ANSWER-toward the front of the body
Posterior - ANSWER-toward the back of the body
Frontal plane - ANSWER-Divides the body into anterior (front) and posterior
(back) portions.
Which part of the atom is involved in chemical reactions? - ANSWER-Electrons
Which part of the atom makes up the atomic number? - ANSWER-Protons
What is the main function on rough endoplasmic reticulum? - ANSWER-Protein
synthesis
What kind of cell division results in a diploid, increasing the number of cells? -
ANSWER-Mitosis
How many pairs of chromosomes do humans have? - ANSWER-23 pairs
What kind of cell division results in a haploid? - ANSWER-Meiosis
Meiosis I - ANSWER-Splits genetic material in half, producing a diploid
Meiosis II - ANSWER-Separates sister chromatids
-four haploid daughter cells
-develop into egg or sperm
Prophase - ANSWER-Chromosomes become visible, nuclear envelope dissolves,
spindle forms
Metaphase - ANSWER-Chromosomes line up in the middle of the cell
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