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BIO 253 - Final Questions and Answers

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10/30/25, 1:49 PM BIO 253 - Final Diagram | Quizlet



Science Biology Physiology


BIO 253 - Final
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Terms in this set (302)


- Most common in body
- Effectors return conditions to normal
- Shuts off when normal state is reached, counters/corrects something
Negative feedback
- Long-lived
- Think furnace thermostat
- BP, glucose, temp, hormones

- Change is intensified, keeps stimulating until homeostasis is reached
- Can produce unstable conditions in the beginning
Positive feedback
- Short-lived
- Labor, blood clotting, sneezing

To stand erect facing forward with arms at the sides and palms of the hands turned
Anatomical position
forward with feet flat on the floor

Anterior/Ventral Front

Posterior/Dorsal Back

Superior Top

Inferior Bottom

Medial Middle

Lateral Away from the midline

Bilateral Both sides

Ipsilateral Same side

Contralateral Opposite side

Proximal Closer to the point of attachment

Distal Away from the point of attachment

Superficial Near the surface


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, 10/30/25, 1:49 PM BIO 253 - Final Diagram | Quizlet

Deep Away from the surface

Sagittal plane Divides body into left and right

Transverse plane Divides body into top and bottom

Coronal plane Divides body into front and back

Abdominal regions: both upper right and Hypochondriac
left

Abdominal regions: upper middle Epigastric

Abdominal regions: middle right and left Lateral

Abdominal regions: middle Umbilical

Abdominal regions: lower right and left Inguinal

Abdominal regions: lower middle Pelvic

- Positively charged
Cation
- Loses electron to become stable

- Negatively charged
Anion
- Gains electron to become stable

- Strong
Ionic bond - Will lose or gain electrons
- Salt

- Strong
- Shares electrons
Covalent bond
- Polar, nonpolar
- Gases, H2O

- C & H are directly attached
Organic molecules
- Carbs, lipids, protein, nucleic acids

- Does not have C & H both
Inorganic molecules
- HCO3 (Bicarb), H2O, O2, CO2, Salt

- Glucose
Carbs
- Main source of energy

- Fatty acids
Lipids
- Triglycerides

- Amino acids
Proteins - Last resort for energy
- Peptide bonds (weak)

- Nucleotides
Nucleic acids
- DNA, RNA

- Selectively permeable
Cell membrane - Made from lipids & proteins
- Tails in, heads out of phospholipid bilayer

- Cytosol
Cytoplasm
- Organelles

- Control center
Nucleus
- DNA & RNA made

- Stacks of vesicles
Golgi apparatus - UPS / transport center
- Refines, packages, delivers proteins made in RER

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