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Jann Vince posted an update 1 year ago
controls are reference materials or samples used in clinical laboratories to monitor the accuracy and precision of laboratory test results. They are run alongside patient samples to ensure that the laboratory test is performing within acceptable limits.
Positive controls contain a known amount of the analyte of interest within the detectable range of the assay, while negative controls do not contain the analyte of interest.
Regular use of controls is important for detecting and correcting errors in laboratory testing, as well as for ensuring the quality and reliability of test results.
Controls are an essential component of laboratory quality control programs and are required for meeting regulatory requirements and accreditation
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The Master Conductor: Exploring the Nervous Tissue
The human body is an intricate orchestra, with each organ playing a vital role in the symphony of life. But who conducts this complex performance? The answer lies in the nervous tissue, the specialized network that governs our thoughts, movements, and sensations. This remarkable tissue, found throughout the brain, spinal cord, and nerves, serves as the body’s information highway, constantly collecting, processing, and transmitting signals that orchestrate everything we do.
Nervous tissue is primarily composed of two main cell types: neurons and glial cells. Neurons, often called nerve cells, are the stars of the show. These highly specialized cells are responsible for carrying electrical impulses, the language of the nervous system. They possess a unique structure with a cell body containing the nucleus, branching dendrites that receive incoming signals, and a long, slender axon that transmits outgoing signals. Imagine dendrites as tiny ears, the cell body as the brain of the neuron, and the axon as a long, shouting loudspeaker. When stimulated, a neuron generates an electrical impulse that travels down the axon, ultimately prompting a response in another neuron, muscle cell, or gland.
However, neurons wouldn’t be able to perform their magic without the supporting cast of glial cells. These unsung heroes, outnumbering neurons by ten to one, play a critical role in maintaining the health and function of the nervous system. Different types of glial cells have specific responsibilities. Astrocytes, for example, regulate the chemical environment around neurons and help maintain the blood-brain barrier, a selective gateway that protects the brain from harmful substances. Oligodendrocytes and Schwann cells wrap their cell membranes around axons, forming a fatty sheath called myelin. This myelin sheath acts like insulation on an electrical wire, allowing nerve impulses to travel faster and more efficiently.
The nervous system itself is further divided into two major branches: the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS, consisting of the brain and spinal cord, acts as the command center, processing information and sending instructions to the rest of the body. The PNS, on the other hand, is a vast network of nerves that carries sensory information from the body to the CNS and motor commands from the CNS back to the muscles and glands.
Within the CNS, the nervous tissue is further organized into two distinct types of matter: gray matter and white matter. Gray matter, concentrated in areas like the cerebral cortex, is rich in neuron cell bodies and dendrites. This is where the heavy lifting of information processing occurs. White matter, on the other hand, is dominated by myelinated axons. The white color is a result of the myelin sheath, and these long pathways connect different regions of the brain and spinal cord, allowing for the rapid flow of information.
The nervous system’s ability to transmit information relies on a fascinating process called neurotransmission. When a neuron receives a signal, it triggers the release of chemicals called neurotransmitters across a tiny gap called a synapse. These neurotransmitters then bind to receptors on the neighboring cell, influencing its activity. Different neurotransmitters have diverse effects, allowing the nervous system to create a complex symphony of responses. Some, like dopamine, are associated with pleasure and reward, while others, like acetylcholine, are crucial for muscle movement.
Understanding the nervous tissue is fundamental to appreciating the human experience. It allows us to see, hear, taste, smell, and touch the world around us. It coordinates our movements, regulates our internal organs, and even influences our emotions and memories. From the intricate calculations of the brain to the instinctive reflexes of the spinal cord, the nervous tissue is the master conductor, orchestrating the body’s response to every internal and external stimulus.
Although much has been discovered about the nervous system, there’s still a lot we don’t fully understand. Scientists continue to explore the mysteries of how neurons communicate, how memories are formed, and how the brain generates consciousness.
Sources: OpenStax Anatomy and Physiology [OpenStax Anatomy and Physiology]
* National Center for Biotechnology Information. Anatomy, Central Nervous System
Jann Vince Elan D. Rabosa
BSMT-II
MT30-BB
Histology art typically refers to artistic representations inspired by microscopic views of biological tissues. Artists may use various mediums to capture the intricate details and patterns found in cells and tissues when viewed under a microscope. This fusion of science and art aims to convey the beauty and complexity of the microscopic world.
Matthew 6:31–34 (NIV)
“So do not worry, saying, ‘What shall we eat?’ or ‘What shall we drink?’ or “What shall we wear?’ For the pagans run after all these things, and your heavenly Father knows that you need them. But seek first His kingdom and His righteousness, and all these things will be given to you as well.
THE SILLIMAN MOTTO
A REFLECTIONSilliman University’s motto, “Via, Veritas, Vita,” strikes a chord that resonates deeply with its students and the broader community. This three-word phrase encapsulates the essence of what education should be and, more importantly, what life should aspire to become.
“Via” reminds us that education is a journey, not just a destination. It’s about the path we tread, the experiences we gain, and the growth we achieve. Silliman University, with its lush campus and nurturing atmosphere, reinforces the idea that the journey of education is as valuable as the knowledge acquired along the way.
“Veritas” urges us to seek the truth in all aspects of our lives. It highlights the importance of intellectual curiosity and ethical integrity. It serves as a reminder that in a world filled with misinformation, critical thinking and a commitment to truth are more crucial than ever.
“Vita” encourages us to live a life of meaning and service. It’s not just about personal success but about making a positive impact on our communities and the world. Silliman University instills in its students the notion that true fulfillment comes from contributing to the greater good.
As I reflect on this motto, it becomes clear that it’s not just a phrase; it’s a philosophy. It’s a reminder that education is a journey toward truth, and the purpose of acquiring knowledge is to live a life of service. It’s a call to be lifelong learners, seekers of truth, and compassionate individuals who give back to society.
Silliman University’s motto, “Via, Veritas, Vita,” isn’t merely a motto; it’s a guiding light for those who pass through its hallowed halls and, more significantly, a timeless inspiration for living a life of purpose, truth, and service.
Jann Vince Elan D. Rabosa
GE10-DD
BSMT-II
REFLECTION ON ROMANS CHAPTER 4 -6 – Google DocsREFLECTION ON ROMANS CHAPTER 4-6 In these chapters, Paul explores the themes of faith, justification, peace, and reconciliation with God. As I reflect on these chapters, it becomes evident that they present a powerful message about the relationship between faith and righteousness. The central…
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