BIOS 255 Comprehensive Exam 2
By ExamNavigator
- / 3
BIOS 255 Comprehensive Exam 2
- 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
- / 3
- 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
- pH scale
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?
Answer: Protein syn- thesis
- 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
- / 3