Understanding Blood: Composition, Function, and Pulse
Sports Medicine
Sports medicine applies scientific and medical principles to athletic performance and physical activity, leveraging exercise for preventive and therapeutic benefits to maintain health and mitigate risks associated with insufficient or excessive physical exertion.
Blood Composition
Like any tissue, blood comprises cells and extracellular components (the extracellular matrix). These two fractions are:
- Cellular Components (Formed Elements): Semisolid elements and particles (corpuscles)
Human Sensory and Nervous Systems: Functions and Processes
Processes Related to Sensory Function: There are three main groups of processes: the reception of stimuli, the development of coordinated responses, and the implementation of responses. To carry these out, the human being has receptors or sensory organs, systems of coordination, and effector organs.
Stimulus: A change in our environment or within us that we perceive and that provokes a response from our body.
Reception of Stimuli: Our body can capture stimuli because we have receptors that react when
Read MorePhospholipids, Steroids, and Amino Acids: Building Blocks of Life
Phospholipids
Phospholipids, also known as phosphoglycerides, are the major lipid components of biological membranes. The simplest phospholipid is phosphatidic acid, composed of glycerol, two fatty acids, and phosphoric acid. Other phospholipids have a polar compound containing at least one amino or alcohol group linked to phosphatidic acid. Phospholipids are amphipathic, meaning they have both polar and nonpolar regions. The polar region includes the phosphoric acid and alcohol, while the nonpolar
Read MoreHormones & STDs: A Comprehensive Overview
Major Hormones: Origin and Function
Endocrine Glands and Hormones
| Hormone | Gland | Physiological Effects |
|---|---|---|
| Thyrotropin | Anterior Pituitary | Controls the thyroid and stimulates thyroxine production. |
| Adrenocorticotropin | Anterior Pituitary | Stimulates hormone production in the adrenal cortex. |
| Somatotropin | Anterior Pituitary | Stimulates growth. |
| Follicle-Stimulating Hormone (FSH) | Anterior Pituitary | Stimulates Graafian follicle formation in the ovary. |
| Luteinizing Hormone (LH) | Anterior Pituitary | Regulates testosterone and progesterone |
Bioelements and Biomolecules: Composition and Properties of Living Matter
Bioelements
Bioelements are the chemical elements that constitute living matter.
- Primary (95%): C, H, O, N
- Secondary (4.5%): P, S, Ca, Na, K, Mg, Cl
- Trace (0.5%): Mn, Cu, Zn, Fe
Biomolecules
- Inorganic: Water and mineral salts
- Organic: Carbohydrates, lipids, proteins, nucleic acids, biocatalysts (enzymes, vitamins, and hormones)
Water
Characteristics
Water is formed by two hydrogen atoms and one oxygen atom, linked by single covalent bonds. It is electrically neutral. Water molecules can interact with each
Read MoreCirculatory Systems in Animals: Open, Closed, and Double Circulation
Open and Closed Circulatory Systems
Open Circulatory System
In an open circulatory system, the heart pumps fluid (hemolymph) through open-ended vessels that lead to tissues and body cavities, directly bathing the cells. Molluscs (except cephalopods) exemplify this system. Cephalopods have a compartmentalized heart with one ventricle and one or two atria, enclosed within a pericardial cavity. Arthropods possess a tubular heart, a thickened dorsal vessel. Hemolymph is pumped from the heart into arteries,
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