Examen Inter-semestral Flebotomia / Electrocardiografia

La ausencia de impulsos eléctricos en el corazón causa que la línea en la tira del electrocardiograma sea plana. Esto indica que no hay actividad eléctrica en el corazón, lo cual es un signo de paro cardíaco o muerte.

The correct answer states that red blood cells transport oxygen in hemoglobin. This is a factual statement about the function of red blood cells. Hemoglobin is a protein found in red blood cells that binds to oxygen and carries it throughout the body. Therefore, the statement is correct.

The correct answer is "Parenteral." Hepatitis B is mainly transmitted through parenteral routes, which include direct contact with infected blood or body fluids, such as through contaminated needles or syringes, sexual contact, or from an infected mother to her newborn during childbirth. Transmission through the digestive, topical, or otic routes is less common for Hepatitis B.

Las plaquetas son células sanguíneas que juegan un papel crucial en la coagulación de la sangre. Cuando se produce una lesión en los vasos sanguíneos, las plaquetas se adhieren al sitio de la lesión y forman un tapón para detener la hemorragia. Por lo tanto, es correcto decir que las plaquetas intervienen en el control de las hemorragias.

The correct answer is mitochondria. Mitochondria are known as the powerhouses of the cell because they are responsible for producing energy in the form of ATP through cellular respiration. They have their own DNA and can replicate independently within the cell. The other options listed, such as the endoplasmic reticulum, lysosomes, and ribosomes, are important cellular components but do not play a direct role in energy production.

La disminución de leucocitos se conoce como leucopenia. La leucopenia es un trastorno en el cual el número de leucocitos en la sangre se encuentra por debajo de lo normal. Esta condición puede ser causada por diversas razones, como infecciones virales, enfermedades autoinmunes, quimioterapia, radioterapia, entre otras. La leucopenia puede debilitar el sistema inmunológico y aumentar el riesgo de infecciones. Por lo tanto, la opción correcta es leucopenia.

When the ECG shows no relationship between the P waves and the QRS complexes, it indicates a condition called dissociation electromechanica. This refers to a lack of coordination between the electrical activity of the heart (represented by the P waves) and the mechanical pumping action of the heart (represented by the QRS complexes). This can occur in various conditions such as severe heart block, ventricular fibrillation, or severe myocardial infarction. It is a serious condition that requires immediate medical attention.

The correct answer is "De la aurícula izquierda al ventrículo izquierdo." This is because the mitral valve is located between the left atrium and the left ventricle in the heart. It allows blood to flow from the left atrium to the left ventricle during the normal functioning of the heart.

Ribosomes are responsible for protein synthesis in a cell. They are small organelles found in the cytoplasm or attached to the endoplasmic reticulum. Ribosomes read the genetic information in the form of mRNA and use it to assemble amino acids into proteins. They are composed of RNA and protein subunits and are essential for the production of proteins, which are crucial for various cellular functions. Therefore, ribosomes are the correct answer as the organelles responsible for protein synthesis in a cell.