Question

question 40
air is filtered, humidified, and adjusted to body temperature in the:
lungs
bronchi
trachea
alveoli
question 41
another name for red blood cells is

question 42
an electrical charge called an causes the muscle walls of the heart to contract

Explanation:

• Question 40: The nasal cavity is mainly responsible for filtering, humidifying and warming air to body - temperature before it reaches the lungs. But among the given options, the trachea also plays a role in conditioning air to some extent. The bronchi and alveoli are more involved in gas - exchange rather than initial air - conditioning.
• Question 41: Red blood cells are also known as erythrocytes, which are responsible for carrying oxygen in the blood.
• Question 42: An electrical charge called an action potential causes the muscle walls of the heart to contract. The action potential spreads through the cardiac muscle cells and triggers the release of calcium ions, leading to contraction.

Answer:

• Question 40: trachea
• Question 41: erythrocytes
• Question 42: action potential