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noname [10]
4 years ago
9

What should police officers do to prevent false identifications during lineups?

Biology
1 answer:
jeka944 years ago
8 0
To prevent false identifications during lineups, the police officers should tell the witnesses that the lineup may not include the suspect. The eyewitness identifications are subject to a high rate of error because witnesses are subject to high stress or anxiety, the human memory tends to reconstruct incidents because humans do not have the capability to record memories like a video recorder; witnesses often focus on weapons, and not the identification of the perpetrator, among other reason. 
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Which BEST describes acidified soils?
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A. They are less likely to hold the nutrients
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A middle-aged woman is admitted to the coronary care unit with a diagnosis of left ventricular failure resulting from a myocardi
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1. The oxygen deprived cardiac muscles caused chest pain.

2. Unavailability of oxygen and blood supply to skin cells made them pale and cold.

3. Accumulation of blood in pulmonary circuit caused moist sounds.

Explanation:

The left ventricle receives oxygenated blood from the left atrium. Oxygenated blood from the lungs is carried to the left atrium by pulmonary veins. The left ventricle pumps the oxygenated blood to all body parts through the aorta. Failure of the left ventricle deprived the skin cells of oxygenated blood. Oxygen deficiency stopped energy production by cellular respiration. The result was pale and cold skin.

Failure of the left ventricle led to the accumulation of blood in the pulmonary circuit since the blood was not delivered to body tissues. The build-up of blood and resultant higher blood pressure caused moist sounds in the lower lungs.  

The blockage of the coronary artery by a blood clot and death of a part of the heart due to lack of oxygen leads to a heart attack. The dead heart tissue is known as infarct and the resultant heart attack is myocardial infarction. Chest pain is caused due to the dead heart tissue or infarct.  

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3 years ago
Las estructuras que facilitan la union de las venas y arteriasel intercambio gaseosos entre los dintistos tejidos y la sangre qu
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Answer:

Intercambio de oxígeno y dióxido de carbono

Por 

Rebecca Dezube

, MD, MHS, Johns Hopkins University

Última revisión completa jun. 2019

HACER CLIC AQUÍ PARA LA VERSIÓN PARA PROFESIONALES

La principal función del aparato respiratorio es inhalar oxígeno y eliminar dióxido de carbono. El oxígeno inhalado penetra en los pulmones y alcanza los alvéolos. Las capas de células que revisten los alvéolos y los capilares circundantes se disponen ocupando el espesor de una sola célula y están en contacto estrecho unas con otras. Esta barrera entre el aire y la sangre tiene un grosor aproximado de una micra (1/10 000 cm). El oxígeno atraviesa rápidamente esta barrera aire–sangre y llega hasta la sangre que circula por los capilares. Igualmente, el dióxido de carbono pasa de la sangre al interior de los alvéolos, desde donde es exhalado al exterior.

La sangre oxigenada circula desde los pulmones por las venas pulmonares y, al llegar al lado izquierdo del corazón, es bombeada hacia el resto del organismo (véase Función del corazón). La sangre con déficit de oxígeno y cargada de dióxido de carbono vuelve al lado derecho del corazón a través de dos grandes venas: la vena cava inferior y la vena cava superior. A continuación, la sangre es impulsada a través de la arteria pulmonar hacia los pulmones, donde recoge el oxígeno y libera el dióxido de carbono.

Intercambio de gases entre las alveolas y los capilares

Para mantener la absorción de oxígeno y la emisión de dióxido de carbono, entran y salen de los pulmones entre 5 y 8 L de aire por minuto, y cada minuto se transfiere alrededor del 30% de cada litro (cerca de tres décimos de galón) de oxígeno desde los alvéolos hasta la sangre, aun cuando la persona esté en reposo. Al mismo tiempo, un volumen similar de dióxido de carbono pasa de la sangre a los alvéolos y es exhalado. Durante el ejercicio, es posible respirar más de 100 L de aire por minuto y extraer de este aire 3 L de oxígeno por minuto. La velocidad de entrada del oxígeno en el organismo es una medida importante de la cantidad total de energía consumida por este. La inspiración y la espiración se llevan a cabo gracias a los músculos respiratorios.

4 0
3 years ago
Which gases are carried by red blood cells. check all that apply
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What is the most important factor that holds a gene pool of a species together and prevents speciation? hints?
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Answer;

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Gene flow is the most important factor that holds a gene pool of a species together and prevents speciation.

Explanation;

-Evolution may occur as a result of genes being transferred from one population to another.  This gene flow occurs when there is migration. The loss or addition of people can easily change gene pool frequencies even if there are no other evolutionary mechanisms operating.

-Gene flow may also occur without migration, for instance, when people travel to another area and successfully mate with people in the population there, a transfer of genes occurs between the populations even though the traveler returns home.

-Additionally, gene flow may flow between species. A good example is when segments of DNA are transferred from one species to another by viruses as they invade the cells of animals or plants.

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