STD 11 - 15. Body fluids and criculations — NEET STD 11 Science — Question

Which one of the following statements are correct ?
(i) Respiration in total involves 5 steps.
(ii) The movement of air into and out of lungs is carried out by creating pressure gradient between lungs and the atmosphere.
(iii) Inspiration occur if the pressure within the lungs is more than the atmospheric pressure.
(iv) Expiration takes place when intra-pulmonary pressure is lower than atmospheric pressure.
(v) Inspiration is initiated by the contraction of diaphragm which increases the volume of thoracic chamber in the antero-posterior axis.
(vi) During inspiration, contraction of external inter-costal muscle lifts the ribs and the sternum causing an increase in the volume of thoracic chamber in dorsoventral axis.
(vii) Humans have the ability to increase the strength of inspiration and expiration with the help of additional muscle in the abdomen.
(viii) On an average, a healthy human breathe 12-16 times/minute.
(ix) The volume of air involved in breathing movements can be estimated by using a spirometer which does not help in clinical assessment of pulmonary functions.
(x) Approximately 500 ml of air is inspired or expired during forceful respiration and a healthy man can inspire or expire approximately 6000-8000 ml of air per minute.
Choose the correct option given below :-

Select incorrect statement.

The number of contrasting characters studied by Mendel for his experiments was

Which of the following statements is correct about the origin and evolution of men ?

Motile zygote of Plasmodium occurs in

Cancer is related to

What is not present in female cockroach ?

Which one of the following statements are correct ?
(i) Mesothoracic wing in cockroach is also called as tegmina.
(ii) Male cockroach bear a pair of long, thread like. anal styles, which are absent in female.
(iii) In both sexes in cockroach, the 9-segment bears a pair of jointed filamentous structures called anal cerci.
(iv) In cockroach crop is present at junction of midgut and hindgut which help in removal of excretory products from haemolymph.
(v) A ring of 6-8 blind tubules called hepatic caecae is present at junction of foregut and midgut in cockroach.
(vi) In cockroach malphigian tubules is present at junction of midgut and hindgut which help in removal of excretory products from haemolymph
(vii) Blood from sinuses enter heart through ostia and is pumped posteriorly to sinuses again in cockroach.
(viii) The respiratory system consists of a network of trachea, that open through 10 pair of small holes called spiracles
(ix) Cockroach converts nitrogenous waste product into uric acid and bence is called uricotelic organism.
(x) In cockroach, 3 ganglia lie in the thorax, and 6 in the abdomen.
(xi) Both eye in cockroach consists of about 2000 hexagonal ommatidia and gives mosaic vision.
(xii) The chitinous symmetrical structure surrounding the gonopore is called phallomere/gonapophysis in cockroach
(xiii) In male cockroach, mushroom gland act as reproductive gland.
(xiv) In female cockroach, each ovary is formed of a group of eight ovarioles.
(xv) The un-fertilized eggs are encased in capsules called oothecae in cockroach.
Choose the correct option given below :-