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Bio 161 Psu Exam 1 Questions And Answers With Verified Solutions Already Passed Latest Updated 2025
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Bio 161 Psu Exam 1 Questions And Answers With Verified Solutions Already Passed Latest Updated 2025

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  • December 10, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • Bio 161 Psu
  • Bio 161 Psu

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Bio 161 Psu Exam 1 Questions And
Answers With Verified Solutions Already
Passed Latest Updated 2025
Subdivisions of Anatomy - ANSWER✔✔ Gross or macroscopic, microscopic,
developmental

Subdivisions of physiology - ANSWER✔✔ Based on organ systems (e.g., renal or
cardiovascular physiology)
Often focuses on cellular and molecular levels

Life functions - ANSWER✔✔ function independently, reproduce, react to stimuli,
use energy source, grow

Principal of Complementarity - ANSWER✔✔ function always reflects structure;
what a structure can do depends on its specific form

Necessary Life Functions - ANSWER✔✔ maintaining boundaries, movement,
responsiveness, digestion, metabolism, excretion, reproduction, growth

Survival needs - ANSWER✔✔ nutrients, oxygen, water, normal body temperature,
appropriate atmospheric pressure

Homeostasis - ANSWER✔✔ maintenance of a stable internal environment

control mechanisms - ANSWER✔✔ receptor, control center, effector

Steps for a control mechanism - ANSWER✔✔ Stimulus, receptor, input, output,
response

negative feedback - ANSWER✔✔ shuts off the original stimulus or reduces its
intensity

positive feedback - ANSWER✔✔ response enhances or exaggerates the original
stimulus

, homeostatic imbalance - ANSWER✔✔ a disturbance in homeostasis resulting in
disease

Dorsal cavity contains - ANSWER✔✔ cranial cavity and vertebral cavity

ventral cavity - ANSWER✔✔ thoracic and abdominopelvic

Thoracic cavity - ANSWER✔✔ pleural cavities, mediastinum, pericardial cavity

Membranes in Ventral Body Cavity - ANSWER✔✔ serous membrane, parietal
serosa, visceral serosa

abdominopelvic cavity - ANSWER✔✔ abdominal cavity (stomach, spleen) and
pelvic cavity (bladder, some reproductive organs)

Membranes for heart, lungs, abdominocavity - ANSWER✔✔ pericardium, pleurae,
peritoneum

Cell - ANSWER✔✔ structural and functional unit of life

3 parts of cell theory - ANSWER✔✔ 1) Cell is the smallest unit of life
2) All things made up of at least one cell
3) Only arise from other cells

3 main parts of a cell - ANSWER✔✔ plasma membrane, cytoplasm, nucleus

3 extracellular materials - ANSWER✔✔ Extracellular fluid, cellular secretions,
extracellular matrix

fluid mosaic model - ANSWER✔✔ model that describes the arrangement and
ever-changing movement of the molecules that make up a cell membrane;

Membrane lipids - ANSWER✔✔ 75% phospholipids (lipid bilayer)
5% glycolipids
20% cholesterol

2 types of membrane proteins - ANSWER✔✔ integral and peripheral

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