STD 11 - 18. Neural control and coordination — NEET STD 11 Science — Question

Given below are two statements:
Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the semen duct.
Statement II: The cavity of the cervix is called cervical cap which along with vagina forms birth canal.
Choose the correct answer from the options given below:

Members of which phylum exhibit adaptations to widely varied environmental conditions

Choanocytes perform

Which of the following abnormalities is due to autosomal dominant mutation?

Among the following is a freeliving flatworm

Reabsorption in the tubules of nephrons occurs by the process of

Statement I: Juxta glomerular apparatus (JGA) is a sensitive region formed by cellular modifications in the proximal convoluted tubule and afferent arteriole at the location of their content.
Statement II: A fall in GFR can activate the JG cells to release renin.

Which of the following statements are correct regarding respiration from given statement and choose correct option ?
(i) Lungs are situated in the thoracic chamber which is anatomically an air-tight chamber.
(ii) The thoracic chamber is formed dorsally by the vertebral column, ventrally by the sternum, laterally by the ribs and on the lower side by the dome-shaped diaphragm.
(iii) The movement of air into and out of the lungs is carried out by creating a pressure gradient between the blood and the atmosphere.
(iv) Inspiration can occur if the pressure within the lungs (intra-pulmonary pressure) is less than the atmospheric pressure.
(v) Expiration takes place when the intra- pulmonary pressure is higher than the atmospheric pressure.
(vi) The diaphragm and a specialised set of muscles- external and internal intercostals between the ribs, help in generation of such gradients.
(vii) We have the ability to increase the strength of inspiration and expiration with the help of additional muscles in the abdomen.
(viii) On an average, a healthy human breathes 22-26 times/minute.