Biology - Study Mode

[#666] The C shape of the tracheal cartilage is important because
Correct Answer

(B) Allows for expansion or contraction of the trachea

Explanation

Solution: The cartilaginous rings are C-shaped to allow the trachea to collapse slightly at the opening so that food can pass down the esophagus.

[#667] Alveoli is related to which of the following system of human body?
Correct Answer

(D) Respiratory system

Explanation

Solution: Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. Although they're microscopic, alveoli are the workhorses of your respiratory system.

[#668] Complete oxidation of sucrose in presence of oxygen into CO 2 , water and energy is called
Correct Answer

(A) Aerobic respiration

Explanation

Solution: Aerobic respiration takes place in the presence of oxygen and finally degrades glucose to carbon dioxide and water with release of energy in form of ATP. So, the correct answer is option A.

[#669] When the diaphragm and external intercostal muscles contract,
Correct Answer

(C) The volume of the thorax increases

Explanation

Solution: When the diaphragm and external intercostal muscles contract, the volume of the thorax increases.

[#670] Blood leaving lungs, is rich in
Correct Answer

(A) Oxygen

Explanation

Solution: Blood leaving lungs, is rich in oxygen.