Comprehensive Study Notes for ANP College: Foundations, Cells, Genetics, and Nervous System

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Tailored notes based on your materials, expanded with key definitions, examples, and context.

Lab Safety

Standard Safety Practices in Scientific Labs

Laboratory safety is essential to prevent accidents and ensure a safe working environment. The following protocols are standard in scientific settings:

Wear closed-toe shoes and long pants to protect the body from spills and hazards.
Personal Protective Equipment (PPE): Includes lab coat, masks, goggles, and gloves.
Hand hygiene: Wash hands before and after lab activities, even when gloves are worn.
No cell phones on bench tops to avoid contamination and distraction.
No food or drinks allowed in lab space to prevent ingestion of hazardous substances.
No inserting contacts or applying makeup during lab to avoid contamination.

Correct Hand-Washing Technique

Remove accessories (watches, jewelry) from fingers or wrists.
Wet hands under running water.
Apply soap and rub for 20 seconds; use a nail brush for nails.
Rinse hands thoroughly.
Dry hands with a clean paper towel; use it to turn off the tap.
Dispose of the paper towel in the trash.

Personal Protective Equipment (PPE)

PPE is used to minimize exposure to hazards. Common PPE includes lab coats, gloves, goggles, and masks, each serving to protect against specific risks such as chemical splashes, biological agents, or airborne particles.

Microscopy

Microscope Parts and Their Functions

Understanding the parts of a microscope is crucial for proper use and maintenance. Key components include:

Eyepiece (Ocular Lens): Magnifies image, typically 10x.
Objective Lenses: Provide varying magnification (e.g., 4x, 10x, 40x).
Revolving Nosepiece: Holds and rotates objective lenses.
Stage: Platform for slide placement.
Stage Clips: Secure slides.
Diaphragm: Regulates light reaching the specimen.
Light Source: Provides illumination.
Coarse and Fine Adjustment Knobs: Focus the image.
Arm: Supports the body tube; used for carrying.
Base: Supports the microscope.
Condenser: Focuses light onto the specimen.

Labeled diagram of microscope parts and functions Modern microscope with labeled parts

Calculating Total Magnification

Total magnification is determined by multiplying the power of the objective lens by the power of the ocular lens:

Formula:
Ocular lens power is typically 10x.
Example: If using a 40x objective lens, total magnification is .

Rules of Proper Microscope Use

Carry the microscope with one hand under the base and the other holding the arm.
Return the objective lens to scanning power before storing.
Use the coarse focus knob only with scanning and low-power objectives.
Do not touch the barrel; use the nosepiece to change objectives.
Report mechanical issues to the instructor.

Steps to View a Specimen

Obtain slide and microscope.
Turn on the microscope.
Place slide on stage and secure.
Rotate to scanning objective.
Use coarse knob to focus.
Use fine knob to sharpen image.
Center image with stage knobs.
Rotate to low-power objective.
Adjust brightness with diaphragm.
Use fine knob to sharpen focus.
Rotate to high-power objective.

Organization and Organ Systems

Levels of Biological Organization

Biological organization is hierarchical, from smallest to largest:

Atoms → Molecules → Cells → Tissues → Organs → Organ Systems → Organism

Anatomical Position

The anatomical position is a standard reference for describing body parts:

Body upright, arms at sides, palms forward, thumbs lateral.

Definitions: Anatomy and Physiology

Anatomy: Study of bodily structure and location.
Physiology: Study of normal functions of living organisms and their parts.

Body Cavities

Ventral Cavities: Thoracic, Abdominopelvic
Dorsal Cavities: Cranial, Vertebral

Major Organs in Organ Systems and Their Cavities

The following table summarizes the major organs in each system and their associated cavities:

Organ System	Organs	Cavity
Integumentary	Skin, sweat glands, oil glands	None
Renal/Urinary	Urinary bladder, ureters, kidneys	Abdominopelvic
Lymphatic	Lymph nodes, vessels, red bone marrow, thymus, spleen, skin	Thoracic/Abdominal
Muscular	Biceps, triceps, deltoid, gluteus maximus	None
Cardiovascular	Heart, blood vessels	Thoracic
Nervous	Brain, spinal cord	Cranial/Vertebral
Respiratory	Lungs, trachea	Thoracic
Digestive	Mouth, stomach, intestines, pancreas	Abdominopelvic
Reproductive	Ovaries/testes, uterus, mammary glands, prostate	Abdominopelvic
Endocrine	Pancreas, thyroid, thymus, ovaries/testes	Abdominopelvic
Skeletal	Bones	None

Chemical Composition of Cells

Dehydration Synthesis and Hydrolysis

Dehydration Synthesis: Removal of H2O to form polymers from monomers.
Hydrolysis: Addition of H2O to break polymers into monomers.

Positive and Negative Controls

Positive Control: Shows expected result when molecule is present.
Negative Control: Shows expected result when molecule is absent.

Simple vs. Complex Carbohydrates

Simple Carbohydrates: Monosaccharides and disaccharides (e.g., glucose, maltose).
Complex Carbohydrates: Polysaccharides (e.g., starch, glycogen).

Tests for Biomolecules

Biuret Test (Protein): Detects peptide bonds. Positive: violet/purple; negative: blue.
Benedict's Test (Simple Sugars): Detects glucose. Positive: color change (green, yellow, orange, red); negative: blue.
Iodine Test (Complex Sugars): Detects starch. Positive: blue/black; negative: yellow/brown.

Cell Structure and Function

Cell Organelles and Their Functions

Rough ER: Folds proteins into final shape.
Smooth ER: Processes lipids and carbohydrates.
Nucleus: Houses DNA.
Ribosome: Protein synthesis.
Mitochondria: Produces ATP.
Golgi Apparatus: Receives and delivers proteins and lipids.
Nucleolus: Ribosome production.
Lysosome: Breaks down waste.
Cell Membrane: Controls entry and exit of substances.

Diffusion Across the Cell Membrane

Plasma Membrane: Selectively permeable, composed of phospholipid bilayer and embedded proteins.
Simple Diffusion: Molecules move from high to low concentration without proteins.
Facilitated Diffusion: Requires membrane proteins; each protein is specific to a molecule type.