Answer:
D. Organs and muscles require more blood under stress.
Explanation:
Because muscular contractions can have a protracted metabolic expenditure because it has to be adjusted to the demands of the contracting muscles.
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Answer:
Spitting blood or bloodstained sputum from the lungs or bronchial tubes is a symptom of many diseases, more symptoms need to be revealed for a single disease to be identified. However, diseases that have the symptom of spitting blood or bloodstained sputum from the lungs or bronchial tubes are listed below.
Explanation:
Spitting blood with sputum (cough) and coughing means that the bleeding comes from the lungs or airways, which may indicate any of the following diseases:
- Pulmonary infections, such as acute bronchitis or chronic bronchitis;
- Pulmonary Tuberculosis;
- pulmonary infarction (death of part of the lung tissue caused by obstruction of some artery);
- Bronchiectasis (abnormal dilation of the pulmonary bronchi);
- Venocapillary hypertension (increased blood pressure in the pulmonary veins that can cause small vessels to rupture);
- Left ventricular failure of the heart;
- Mitral valve stenosis (narrowing) of the heart.
Spitting blood without a cough may be a sign of a nose or throat injury. For example, if the throat is inflamed or infected, there may be minor bleedings due to minor mucosal lesions, and when the discharge comes out, it is accompanied by blood.
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