Understanding Blood Test Results: WBC, Hemoglobin, Platelets & More
WBC Count (WCC)
Normal value: 3,500 – 11,000/mL.
White blood cells, or leukocytes, are defense cells circulating in the bloodstream. Types include neutrophils, lymphocytes, monocytes, and eosinophils. The total value is the sum of all types; an increase or decrease in one type affects the overall count.
- Neutrophils: Normal value: 2,000 – 7,500/mL. The most numerous, they attack foreign substances (bacteria, external agents). Their numbers increase during infection or inflammation. ‘Immature’ neutrophils,
The Properties of Water and Cell Structure
Water’s Vital Role and Cell Structure
The Remarkable Properties of Water
Density of Ice
Ice, the solid form of water, is less dense than liquid water, allowing it to float. This unique property enables aquatic life to thrive beneath ice sheets in cold environments.
Water’s Functions
Water’s properties contribute to its diverse roles:
- Metabolic Function: Water dissolves substances, facilitating metabolic reactions and acting as a reagent in processes like hydrolysis during digestion. It also provides hydrogen
Human Sensory System, Skeleton, and Muscles
Sensory Perception
Nerve stimulation is perceived by specialized cells called receptors, distributed throughout the body. There are different types:
- Thermoreceptors: Detect temperature. Located under the skin.
- Chemoreceptors: Detect chemicals. Found in the nose and mouth (smell and taste).
- Photoreceptors: Detect light. Located in the eyes.
- Pain Receptors: Located throughout the body, irregularly shaped.
- Pressure Receptors: Located in the skin, enabling detection of objects through touch.
Sense organs perceive
Read MoreHuman Sensory Systems: Smell and Taste
Sensory Systems Overview
Human sensory systems process information for perception. These include:
- Somatic: Touch, pressure, vibration, heat, cold, pain, etc.
- Visceral
Sensory processing involves:
- Receptor stimulation
- Transduction: Stimulus conversion into an electrical impulse
- Nerve Impulse Generation: Electrical potential becomes a nerve impulse
- Transmission: Nerve impulse transmission to the brain
- Integration: Information integration and perception
Receptor Characteristics:
- Transduction: Capability to turn
Digestive System: Functions, Structures, and Nutritional Care
Digestive Process and Key Terms
Digestion converts carbohydrates, fats, and proteins into simpler units for absorption. Insulin, secreted by the pancreas, regulates blood glucose. Heartburn is a burning sensation in the chest. Dysphagia is difficulty swallowing. A sphincter is a ring of circular muscle fibers. Sensory properties involve color, texture, etc. Metabolism encompasses chemical and physical processes in cells. Enteral nutrition is provided through the intestinal tract. Parenteral nutrition
Read MoreOrgan Transplantation: Process, Challenges, and Future Prospects
Transplants
When a person is declared legally dead but their organs are still viable, they may become an organ donor. After a short preservation period, most tissues and organs can be transplanted into another person. The viability window varies by organ; kidneys can last over 48 hours, while the pancreas has a 24-hour limit. Before transplantation, doctors perform compatibility tests to minimize the risk of immune system rejection.
Once compatibility is confirmed, the recipient undergoes surgery.