Exchange of Gases in Amoeba

Q.

List the names of external and internal organs of your body.

Q.

What make up the conducting part of the respiratory system?

1. external nostrils to terminal bronchioles

2. alveoli and their ducts

3. trachea till alveoli

4. nasopharynx to alveolar ducts

Q.

Select the correct option regarding ribs.

1. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.

2. 8th, 9th and 10th pairs of ribs articulate directly with

   the sternum.

3. The 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.

4. Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.

Q.

What is the number of spiracles found in cockroaches?

Q.

What is the respiratory organ of a bird?

Q.

Name the membrane that covers lungs?

Q.

What are the 4 subunits of hemoglobin?

Q.

Is the following statement correct? If it is wrong, correct the statement Statement: “Unicellular organisms do not respire, only multicellular organisms respire”

Q. Read the assertion and reason carefully to mark the correct option in question.
Assertion: Human ribs are called bicephalic.
Reason: Ribs have two articulation surfaces on their dorsal ends.

1. If both assertion and reason are false.
2. If assertion is true but the reason is false.
3. If both assertion and reason are true and the reason is the correct explanation of the assertion.
4. If both assertion and reason are true but the reason is not the correct explanation of the assertion.

Q. (a) Explain how, the air we breathe in gets cleaned while passing through the nasal passage.

Q. The sensory papillae in frogs are associated with

1. hearing
2. smell
3. respiration
4. touch

Q.

The swim bladder in fish is an organ for _____.

Q. Function of pleural fluid is–

1. Provide support
2. Prevent infection
3. Form membranous layer
4. Reduces friction

Q.

Earthworms and frogs breathe through their skin because of which the skin of both the organisms is

1. moist and rough

2. dry and rough

3. dry and slimy

4. moist and slimy.

Q.

Respiratory Centre is located in the______________.

Q.

Breathing organs in dolphin.

Q.

Whether oxygen diffuses from the alveoli into the blood or not is dependent upon the partial pressure of _______________.

1. oxygen in the lungs and in the blood

2. oxygen in the lungs only

3. oxygen and carbon dioxide in the blood

4. all gases in the atmosphere and blood

Q.

The first heart sound is

1. ‘Lubb’ at the end of ventricular systole

2. ‘Dup’ at the end of ventricular systole

3. ‘Lubb’ at the beginning of ventricular systole

4. ‘Dup’ at the beginning of ventricular systole.

Q. Membrane covering the lungs is called

1. pericardial membrane
2. pleural membrane
3. diaphragm
4. vitelline membrane

Q. Choose the options having all the correct statements with respect to the exchange of gases:
I. p$O_2$ is higher in the alveoli than that in the blood.
II. p${\mathrm{CO}}_2$ is lower in tissues than that in the blood.
III. The diffusion membrane is made up of two layers.
IV. The exchange of gases occur by facilitated diffusion.

1. Only II and III
2. Only II, III and IV
3. Only I
4. Only I and II

Q. Explain about the human anatomy.

Q.

The lungs are protected by two membranes called

1. Pleural membranes

2. Meninges

3. Mucous membrane

4. None of these

Q.

Why do whales not have gills?

Q.

How is breathing controlled?

Q.

Where is cuboidal epithelium seen?

Q.

In cockroaches, air enters the body through

1. Lungs

2. Gills

3. Spiracles

4. Skin

Q.

Is cloaca present in chondrichthyes?

Q. Most of the skeleton in a developing embryo is derived from _____ tissue.

1. elastic cartilage
2. fibrocartilage
3. bone
4. hyaline cartilage

Q. Identify whether the following statements are true/false.

$\left(vi\right)$ The closing and opening of the heart occur through the valves during each heartbeat.

Q.

Name the following: The respiration takes place in absence of oxygen.