Hair Structure, Bonds, and Circulatory System Functions
Hair Structure and Chemical Bonds
Differences and Hair: Hair, including the hair on the scalp, serves a profound aesthetic function. It differs from hair found elsewhere on the body.
Peptide Bond: A peptide bond is the union of two amino acids in a chain. These bonds can only be broken with very strong acids.
Hydrogen Bond: A hydrogen bond is an attraction between hydrogen (H) and oxygen (O) atoms within the same chain. These bonds can be broken with water or heat.
Ionic Bonds: These bonds involve the
Read MoreNervous System: Role, Neurons, Brain, and Autonomic Functions
The Role of the Nervous System
The nervous system is a crucial system designed to achieve:
- The adaptation of the organism to changing environmental conditions, both external and internal.
- The relationship and coordination of the different parts of our body to act as a unified whole.
Sensory organs capture information in the form of environmental stimuli and transmit it to the nervous system. The nervous system receives, processes, and develops a response, which is then transferred to effector organs
Read MoreAnatomical Landmarks: Skull, Foot, Skin, and Limb Regions
Anatomical Landmarks
Skull Features
- Trigeminal Impression: Shallow depression near the apex.
- Arcuate Eminence: Resides posterior to the trigeminal impression; raised by the anterior semicircular canal of the labyrinth.
- Tegmen Tympani: A thin plate located between the walls of the tympanic cavity. A purulent process can melt the bony plate and spread from the middle ear onto the brain meninges.
- Petrosquamous Fissure: Separates the anterior surface of the petrous part from the cerebral surface of the squamous
Common Digestive and Respiratory System Diseases
Common Digestive System Diseases
Gingivitis: Painful inflammation of the gums; they redden and bleed. It can be caused by cavities, vitamin deficiency, alcohol consumption, or oral infections.
Gastritis: Irritation of the gastric mucosa. Symptoms include acidity, stomach pain, and heartburn. Caused by irritants such as alcohol, tobacco, spicy foods, and some medications.
Ulcer: A wound caused by the destruction of the gastric mucosa. It is located in the stomach or duodenum. Symptoms: heartburn, acid
Cell Division: Mitosis, Meiosis, and Genetics Explained
Cell Division: Mitosis, Meiosis, and Genetics
1. What are the two types of cell division? There are two types of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Meiosis is the type of cell division that creates egg and sperm cells.
2. Be familiar with the stages of the cell cycle and what is occurring in each; be able to identify the stages. The phases in the reproduction and growth of a cell are
Read MoreAquatic Ecosystems: A Deep Dive
Symbiotic Relationships
Mutually beneficial relationships between two agencies often lead to total dependence between the two species. A common example is the relationship between a heterotrophic organism (like a human) and an autotrophic alga (which produces organic matter).
Aquatic Study Methods
Biotropica
Several measurements are essential for aquatic studies. At different depths, specialized tools like the Van Dorn or Niskin bottle are used for water sampling. Avoid mixing these samples with other
Read More