Notes, summaries, assignments, exams, and problems for Sport and physical education

Equipos de Protección Individual (EPI) y Ergonomía

Los equipos de protección individual deben ser adecuados a las condiciones normales de trabajo, proporcionar seguridad real, ser cómodos y eficaces, y adaptarse a la morfología del usuario, reduciendo al máximo el peligro residual. Entre los EPI más comunes se encuentran:

• Protección contra descargas eléctricas: incluye medios de protección que impidan el paso de la corriente eléctrica a través del cuerpo.
• Protección frente a radiaciones no ionizantes: las protecciones oculares deben absorber o reflejar la mayor parte de la energía de las ondas radiadas perjudiciales.
• Protección respiratoria: debe permitir al usuario respirar aire adecuado cuando se encuentra expuesto a una atmósfera

Cell Structure and Organelles

Cell: the smallest functional unit that performs the three vital functions: nutrition, relation and reproduction.

Cell membrane: a thin limit around the cell. Its function is to regulate the passage of substances.

Cytoplasm: contains many organelles. Its function is to host cellular processes.

• Mitochondria: cellular respiration.
• Cytoskeleton: supports the cell and drives mitosis.
• Ribosomes: synthesize proteins.
• Endoplasmic reticulum: transports substances.
• Golgi apparatus: packages and sends out proteins and glucids.
• Vacuoles: store and eliminate substances.

Nucleus: contains DNA, which protects the cell and carries genetic information.

The Cell and Its Vital Functions

Cell: a functional unit that develops the three vital...

1. Conexión del Motor de Arranque

La corriente positiva llega desde la batería al contacto. Al accionar el interruptor, la corriente pasa por el terminal 50 y del terminal 30 al positivo de la batería, mientras que el negativo se conecta a masa.

2. Funcionamiento del Motor de Arranque

Al accionar el contacto, la bobina de inducción del relé automático empuja la palanca y el piñón hacia afuera. La bobina atrae los contactos del relé, conectando el borne 30 con el borne de salida hacia el motor.

3. Componentes del Motor de Arranque

• Bobina de inducción
• Bobina de campo
• Piñón de ataque
• Escobillas
• Carcasa del motor

4. Verificación del Circuito de Arranque

Se verifica la continuidad del positivo desde la batería hasta el contacto y la masa. Se...

Optimizing Respiration & Mastering Relaxation

Understanding Respiratory Mechanics

Respiratory-Movement Relationship

Respiration involves the exchange of oxygen (O2), carbon dioxide (CO2), and nitrogen, enabling the body to generate energy.

Types of Breathing

• Chest Breathing: Involves intercostal muscles or abdominal muscles.
• Diaphragmatic Respiration: Often complements chest breathing for complete respiratory function.

Dynamic Respiratory Phases

The dynamic output includes: Abdominal Inspiration, Thoracic Inspiration, Abdominal Expiration, and Thoracic Expiration.

Tips to Enhance Respiratory Capacity

• Avoid awkward postures.
• Practice deep breathing (e.g., in a park or mountain setting).
• Maintain a calm, steady breathing pace.
• Avoid accelerated breathing.

Topic 12. EPIDEMIOLOGY OF COLON AND RECTAL CANCER

Colorectal cancer is the second most frequent of all neoplasms. Although genetic and environmental factors influence it, about 80% of colorectal cancers are due to environmental factors, such as diet. More than 90% of cases appear after the age of 50.

Other risk factors include: obesity, diet, sedentary lifestyle, alcoholism, and estrogens. Protective factors include pregnancy, aspirin, and anti-inflammatory steroidal agents.

Previous diseases: ulcerative colitis, and pelvic radiation for breast cancer, endometrial cancer, and ovarian cancer.

NATURAL HISTORY

• The tumor initially develops in the intestinal mucosa (outward growth). Over time it grows inward and extends into the muscular layer.
• Lymph

Origins and Principles of Shiatsu

Sources: Shiatsu was developed in Japan, drawing on Chinese medicine and the traditional concept of energy flow. Its origins are linked to the work of Tokujiro Namikoshi, who opened the first institute of therapy in 1957 and established the first center for teaching the technique. After his death, his son continued the work, and the practice has been carried on by his family and followers.

The Energy System and Meridians

Energy system: The body is traversed by energy pathways called meridians. These form a network through which vital energy (qi) circulates. Meridians connect the body's surface with its internal organs and are organized in relation to the principles of yin and yang and the five elements.

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Predation and Predator Diet

Predation is an interaction in which one organism (the predator) feeds on another (the prey). Similarities and differences with other interactions are often discussed. Some consumers, such as detritivores, do not kill their prey, and it is not always clearly defined whether a consumer is a parasite or a predator. Predators typically kill prey, and they show a strong metabolic dependence on the prey, unlike parasites.

Types of Predators

Predators can be classified in several ways:

• According to prey type: carnivores, herbivores, or omnivores.
• According to hunting strategy: pursuers, filter feeders, deposit feeders, or ambush hunters.
• According to diet variability: monophagous, oligophagous, or polyphagous.
• According to variety

Muscle Physiology and Exercise Fundamentals

Insertion: the attachment point of a muscle to bone.
Muscle belly: the fleshy central part of a muscle.
Tendon: the tissue that connects muscle to bone; its tension leads to muscle contraction.

Types of Muscle Tissue

Skeletal muscle: promotes voluntary movement and constitutes the skeletal muscle system.
Cardiac muscle: the heart is the main part of the cardiac muscle and controls the circulation of blood.
Visceral muscle: internal organs and the parts of blood vessels; it controls involuntary movement.

Muscle Movement Terminology

• Agonist: the muscle that acts as the prime mover for a movement.
• Antagonist: the muscle that opposes a movement.
• Fixator: a muscle that stabilizes the origin of a prime mover so

Tourniquet Application for Severe Bleeding

* Tourniquet: Use a tourniquet only when the wound is bleeding heavily and no other method of stopping the bleeding is effective.

1 - Take a cord, belt, strap, scarf, or similar item and tie a band 6 to 8 cm above the wound.

2 - Place a stick or similar object over the band and twist it to tighten the band around the limb.

3 - Secure the stick in place or tie it so it stays tight. You may use a second band if needed.

4 - Note the time the tourniquet was applied. Make sure the bleeding has stopped and that no pulse can be felt below the tourniquet. Do not remove the tourniquet once it has been applied.

5 - Keep the stick in position and secure the tourniquet with a second strap or cloth.

6 - Point to a visible...