Breathing and Body fluids

Which of the following options is wrong about the larynx (sound box) ?

• It is a bony box

• Glottis is the opening into the larynx

• During swallowing of food glottis is covered by epiglottis to prevent food entry into the larynx

• All

The heart has a left side and a right side that are separated by a__________

• valve

• thick wall

• ventricle

• vein

***** I... It is double layered and covers the lungs

***** II... Fluid between the layers reduces friction on lung-surface

***** III... Outer layer is in contact with thoracic wall

***** IV... Inner layer is in contact with lungs

The above features refer to –

• Pericardium

• Peritoneum

• Pleura

• None

Choose the incorrect statement only-

1. Atrium is the blood vessel that carries blood away from the heart.

1. 2. Lungs are comprised by network of bronchi, bronchioles and alveoli.

2. 3.The circulation of blood between heart and the rest of the body is called systemic circulation.

• 2 and 3

• 1 and 3

• 1 and 2

• only 1

Inspiration occurs when there is a negative pressure in the lungs with respect to atmospheric pressure. This negative pressure is achieved when –

• Intrapulmonary pressure is less than the atmospheric pressure

• Intrapulmonary pressure is equal to the atmospheric pressure

• Interpleural pressure becomes more than the intrapulmonary pressure

• Intra pulmonary pressure is greater than the atmospheric pressure

The left ventricle has the thickest muscle wall since ___

• It need to pump the blood to the 2 lungs.

• It need to pump the blood to the whole body.

• It need to pump the blood to the digestive system.

• It parasites in human body and take nutritions in it.

The conducting part of the respiratory system has functions.

• Filter, warm and moisten the air

• Gaseous exchange

• Filtering the air only

• Warm the air

Statement: There are muscles in the heart

• Correct

• Incorrect

• Partially correct

• No information

Which of the following statements about the partial pressure of CO₂ is true?

• It is higher in alveoli than in pulmonary artery

• It is higher in the systemic arteries than in tissues

• It is higher in systemic veins than in systemic arteries

• It is higher in the pulmonary veins than in pulmonary arteries

If a person is medically diagnosed anemic, what blood components he/she lacks that is needed to adequately supply oxygen to the body tissues?

• Platelets

• Plasma

• RBC

• WBC