Life Science Ch 14 Quiz 1

The alternating expansion and relaxation of the artery that you feel in your wrist is known as your pulse. This rhythmic throbbing is caused by the contraction of the heart, which pumps blood into the arteries. As the blood is pushed through the arteries, it creates a wave-like motion that can be felt in certain areas of the body, such as the wrist. Monitoring the pulse can provide important information about a person's heart rate and overall cardiovascular health.

Red blood cells are responsible for transporting oxygen in the body. They contain a protein called hemoglobin that binds to oxygen in the lungs and carries it to the tissues and organs. The shape of red blood cells, which is a biconcave disc, allows for a large surface area for oxygen exchange. This enables them to efficiently transport oxygen throughout the body. Platelets are responsible for blood clotting, white blood cells are involved in the immune response, and plasma is the liquid component of blood that carries nutrients and hormones.

Two words. Choose the most appropriate answer from your Ch. 14 vocabulary

The heart's larger pumping chambers are called ventricles. The ventricles are responsible for pumping blood out of the heart and into the arteries. They have thicker walls compared to the atria, as they need to generate enough force to push blood throughout the body. The valves, on the other hand, are structures that ensure one-way flow of blood within the heart. Arteries are blood vessels that carry oxygenated blood away from the heart to the rest of the body.

Choose the most appropriate answer from your Ch. 14 vocabulary

Choose the most appropriate answer from your Ch. 14 vocabulary

Emphysema is a disease that affects the lungs, specifically the air sacs or alveoli. It is characterized by the destruction of these air sacs, leading to decreased lung function and reduced ability to take in oxygen from the air. As a result, less oxygen is transported into the bloodstream, leading to lower oxygen levels in the body. This condition is known as hypoxemia and can cause shortness of breath, fatigue, and other respiratory symptoms. Therefore, emphysema causes less oxygen to be taken into the body from the air.

The exchange of gases between the blood and the air takes place in the alveoli. Alveoli are tiny air sacs located at the end of the bronchioles in the lungs. They are surrounded by a network of capillaries where oxygen from the air diffuses into the bloodstream and carbon dioxide from the bloodstream diffuses into the alveoli to be exhaled. This process is essential for respiration and the transportation of oxygen to the body's tissues.

Choose the most appropriate answer from your Ch. 14 vocabulary

Choose the most appropriate answer from your Ch. 14 vocabulary