After blood is “used” by cells, in other words they’ve taken the oxygen, where does it go? Select one: a. Back to the lungs for more oxygen b. Back to the heart and then on to the lungs for more oxygen c. Back to the heart to return to the body for more oxygen d. Back to the capillary beds for more oxygen e. Back to the brain, where the oxygen level is monitored

What term best describes the exchnage of oxygen and carbon dioxide at the interface between the systemic cappillaries and the peripheral tissues? A. Ventilation B. Cellular respiration  C. Internal respiration D. External respiration

In the body Central chemo receptors ______ a. are mostly in the aortic arch b. Detect oxygen levels in the alveolar capillaries c. are found in the carotid bodies d. detect levels of H ions in the cerebral spinal fluid

Write 2 paragraphs about what Are there any parts of the human body that get oxygen directly from the air and not from the blood?

Which of the following is NOT a feature of a gas-exchange organ in animals? A. low surface area for gas exchange B. moist C. thin, delicate structure D. extensive blood flow

1. Carbon dioxide released during respiration can affect the % oxygen saturation of haemoglobin. Carbon dioxide reacts with water to form carbonic acid. Which statements below explains the effect of carbon dioxide on haemoglobin? A. The release of hydrogen ions causes the pH to rise, which reduces haemoglobin's affinity for охуgen. B. The release of hydrogen ions causes the pH to rise, which increases haemoglobin's affinity for oxygen. C. The release of hydrogen ions causes the pH to fall, which increases haemoglobin's affinity for охygen. D. The release of hydrogen ions causes the pH to fall, which reduces haemoglobin's affinity for охуgen. E. None of the above can explain the change. 2. The following events occur when carbon dioxide enters an erythrocyte in a capillary. 1. Hydrogencarbonate ions diffuse into the plasma from the red blood cell 2. Dissociation of carbonic acid 3. Carbon dioxide reacts with water forming carbonic acid 4. Chloride ions diffuse into red blood cell from…

Which lung would have the most large cells (with large nuclei) and the cells would fill up the aveoli? (choose one answer only) A. carcinoma lung B. lung with carbon particles C. normal lung

which of the following processes causes most of the carbon dioxide from the blood to move into the alveoli? a. passive transport using a carrier proteins b. active transport using energy c. conversion to carbon dioxide d. diffusion down a concentration gradient

Use the image to answer the question.   The ability of oxygen to bind hemoglobin changes with altitude as shown. Which statement, if true, BEST explains this observation?   A. The partial pressure of atmospheric oxygen decreases with altitude.   B. The partial pressure of atmospheric oxygen increases with altitude.   C. The partial pressure of atmospheric carbon dioxide decreases with altitude.   D. The partial pressure of atmospheric carbon dioxide increases with altitude.

One of the following is NOT a serous membrane. Which one? A. pleura B. peritoneum C. mucosa D. pericardium