Human Physiolog...

Anaerobic respiration is found in some bacteria, yeasts and many parasitic animals. Which one of the following statements is true about this type of respiration?

Which of the following is/are the posterior opening(s) of the nasal cavities in the human respiratory system that lead(s) into the nasopharynx?

Which of the following cartilages of the larynx is/are leaf shaped, project(s) into the pharynx and made up of elastic cartilage?

A pair of lungs lies in the thoracic cavity. Which of the following internal structures of lungs are without cartilaginous rings?

a. Secondary bronchi
b. Bronchioles
c. Tertiary bronchi

Consider the following statements and choose the correct option.

a. The outer membrane that encloses each lung is called visceral pleura and the inner membrane is called parietal pleura.
b. Lecithin film's function is to lower the surface tension of the alveoli and keep it open.

Which of the following is a characteristic feature of the left lung in the human body?

Consider the following statements and choose the correct option.

a. About 7% of oxygen in the blood is dissolved in the plasma which carries oxygen to the body cells.
b. About 23% of carbon dioxide is carried by haemoglobin as carbaminohaemoglobin.

Which of the following steps of respiration occurring in cytoplasm does not require oxygen and consumes ATP molecules?

Consider the following statements and choose the correct option.

a. Respiratory substrates are those organic substances that can be catabolised to liberate energy inside the living cells.
b. Almost the entire breathing process in pregnant women is through lateral movement of thorax.

Breathing is affected by the expansion and contraction of lungs. Which of the following muscles contract and pull the ribs and sternum upward and outward, thus increasing the volume of thoracic cavity?

External respiration occurs in the lungs where oxygen and carbon dioxide get diffused. This type of respiration occurs between

a. lung alveoli
b. tissue blood capillaries
c. pulmonary capillaries
d. tissue cells

Pharynx allows the passage of swallowed food into the esophagus and comprises nasopharynx, oropharynx and laryngopharynx. Which of the following is a characteristic of pharynx?

Respiratory centre is divided into the medullary and pons respiratory centres. Which of the following respiratory centres is located in dorsal part of pons varolii and its function is mainly to limit inspiration?

In this question, two statements are given. One is assertion (A) and the other is reason (R). Choose the correct answer.

Assertion: Mammals can eat while breathing.
Reason: Mammals have negative pressure breathing.

There are many diseases that are related to respiration. The causative agent of which of the following diseases related to respiration is human coronavirus, a mutant form of influenza virus having 2 - 10 days incubation period?