12th Class Biology MCQS Homeostasis

Which evemt si not associated with the activity of expiration?

More dome like shape of diaphragm

Contraction of diaphragm

Back ward& downward movement of rib cage

Relaxation of intercoastals muscles

The animals which are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within a narrow range

Heterotherms

Homotherms

Endotherms

Ectotherms

Abdomen has a peritoneal cavity lined by a thin epithelium called

Scrotal sac

Pericardium

Pleura

Peritoneum

Bats and humming bird are called

Ectotherms

Heterotherms

poikilotherms

Endotherms

Human lungs are spongy due to the presence of million of:

Bronchi

Trachea

Bronchioles

Alveoli

Antidluretric hormone (ADH) released from posterior pituitary act to actively transport water from filtrate to kidneys

Pelvis

Interstitium

Cortex

Medulla

What does not happen during inspiration in man?

Ribs move forwards

Diphragm becomedome- shaped

Ribs are elevated

Intercoatals musles contract

Which sequence of organs is correct in air passage way of man?

Nasal cavities larynx phaynx trachia bronchi

Nasal cavities phaynx larynxbronchitrachia

Nasal cavities phaynx trachia larynxbronchi

Nasal cavities phaynx larynxtrachia bronchi

Oxygen carryiing capacity of blood does not depend upon:

Particle pressure of CO₂

Quantity of blood

Height from sea level

Particle pressure of O₂

Th elateal walls of the chest cavity of man are composed of the:

Ribs ,Intercostals Muscles & diaphragm

Intercostals Muscles

Ribs and intercoastal muscles

Ribs

The end products of haemoglobin breakdown and metabolites of various hormones is

Bilirubin

Serotonin

Glucagon

Keratin