STD 12 - 8. microbes in human welfare — NEET STD 11 Science — Question

Mechanism of muscle contraction is best explained by

ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle. Read following statements.
(i) Electrocardiograph machine is used to obtain an electrocardiogram (ECG).
(ii) To obtain a standard ECG, a patient is connected to the machine with three electrical leads one to each wrist and to the left ankle.
(iii) For a detailed evaluation of the heart's function, multiple leads are attached to the chest region.
(iv) The P wave represents the repolarisation of the atria, which leads to the contraction of both the atria.
(v) The QRS complex represents the depolarisation of the ventricles, which initiates the ventricular contraction.
(vi) The T wave represents the return of the ventricles from excited to normal state,
Which of the following option contain right statements ?

Mendel's contribution for genetic inheritance was

The glomerular filtration rate in a normal adult is nearly

Ringworm of the scalp is caused by

Which one of the following is a correct match?

Anamnestic response

Statement I: LH acts on the Sertoli cells and stimulates secretion of some factors which help in the process of spermiogenesis.
Statement II: FSH acts at the Leydig cells and stimulates synthesis and secretion of androgens. Androgens, in turn, stimulate the process of spermatogenesis.

Heart.....