Model Paper 10 — NEET STD 11 Science — Question

Inside the skull, the brain is covered by

Which one of the following statements are correct ?
(A) The duration of cardiac cycle is 0.8sec seconds. During cardiac cycle, each ventricle pumps out approximately 70ml of blood, which is called the stroke volume.
(B) The stroke volume multiplied by the heart rate gives the cardiac output, which averages 5 litres in healthy individual.
(C) The cardiac output of athlete will be lower than of an ordinary man.
(D) During cardiac cycle, only one heart sound is produced which can be easily heard through instrument stethoscope.
(E) The first heart sound (dub) is associated with the closure of tricuspid and bicuspid valves and the second heart sound (lub) is associated with closure of semilunar valves.
(F) ECG is a graphical representation of electrical activity of the heart during cardiac cycle.
(G) To obtain a standard ECG, a patient is connected to the machine with 3 electrical leads. One to each wrist and one to left ankle.
(H) The P-wave in ECG represents excitation or polarization of the atria.
(I) The QRS complex of electrocardiogram represents the depolarization of the ventricle.
(J) The T-wave of electrocardiogram represents repolarization and end of T-wave marks the end of diastole.
(K) Blood pumped by left ventricle enter the aorta whereas blood pumped by right ventricle enters pulmonary artery.
Choose the correct option given below :-

One of the legal methods of birth control is

Pineal gland of human brain secretes melatonin concerned with

Which one of the following organisms bears hollow and pneumatic long bones?

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilisation?

In human blood, the oxygen carrier is

Immune activities defence mechanism for different diseases is known as

Which statement is correct for glomerular filtration rate (GFR)?
(i) The amount of the filtrate formed by the kidneys per minute is called glomerular filtration rate (GFR).
(ii) GFR in a healthy individual is approximately 125 ml/minute, i.e., 280 litres per day.
(iii) Glomerular filtration rate regulated by juxtaglomerular apparatus (JGA).
(iv) JGA is formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact.
(v) A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal.
(vi) Rennin which converts angiotensinogen in blood to angiotensin II and further to angiotensin I, which is a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.

Mechanism of hearing :
(i) The external ear receives sound waves and directs them to the ear drum.
(ii) Nerve impulses are generated in the associated afferent neurons.
(iii) The waves in the lymphs induce a ripple in the basilar membrane.
(iv) The vibrations are passed to the fluid of the cochlea, where generate waves in the lymphs.
(v) Vibrations are transmitted through the ear ossicles to the oval window.
(vi) The ear drum vibrates in response to the sound waves
(vii) Impulses are transmitted via auditory nerves to the brain, where the impulses are analysed and the sound is recognised
Choose correct sequence of mechanism of hearing :-