Question

Arrange these events related to oxygen transport and exchange in sequence from earliest (at the lungs) to latest (at the body tissues).

a. Diffusion of oxygen into the blood
b. Oxygen binding to hemoglobin
c. Oxygen transport through the bloodstream
d. Oxygen release to body tissues

Answer 1

The sequence of oxygen transport from the lungs to body tissues starts with the diffusion of oxygen into the blood, followed by oxygen binding to hemoglobin, then transport through the bloodstream, and finally release of oxygen to body tissues.

Step-by-step explanation:

The transport and exchange of oxygen through the human body follow a specific sequence, beginning in the lungs and ending at the body tissues. First, diffusion of oxygen into the blood occurs when oxygen enters the bloodstream from the alveoli. Here is the correct arrangement in sequence:

1. Diffusion of oxygen into the blood: Oxygen enters the bloodstream from tiny sacs in the lungs known as alveoli via diffusion.
2. Oxygen binding to hemoglobin: As oxygen diffuses into the red blood cells, it binds to hemoglobin, forming oxyhemoglobin.
3. Oxygen transport through the bloodstream: Oxygen-bound to hemoglobin is carried through the bloodstream to various parts of the body.
4. Oxygen release to body tissues: Oxygen is then released from hemoglobin and diffuses into body tissues, while carbon dioxide diffuses from the tissues back into the blood.

This sequence ensures that oxygen is efficiently carried from the lungs to all body cells, where it is needed for cellular respiration.