ENTRANCE TEST â€“ 2010 | Multiple Questions and Answers

11.	Expiration in human beings is carried out by

	A.	Contraction of lungs
	B.	Contraction of intercostal membrane
	C.	Relaxation of intercostal and diaphragm muscles
	D.	Contraction of diaphragm muscles

12.	Which one of the following is a precursor of steroid hormones?

	A.	Glycerol
	B.	Sterol
	C.	Amino acids
	D.	Cholesterol

13.	Which one of the following statements best describes the function of sinoatrial node?

	A.	It sends out electrical impulses to atrial muscles causing both atria to contract
	B.	It consists of small number of diffusely oriented cardiac fibre
	C.	It sends out electrical impulses to ventricular muscles causing both ventricles to contract
	D.	It is present at upper end of left atrium

14.	The flow of lymph in lymphatic vessels is maintained by:

	A.	) Heart, activity of smooth muscles and valves
	B.	Activity of skeletal muscles, heart and breathing movements
	C.	Breathing movements, activity of skeletal muscles and valves
	D.	Exercise, breathing movements and hear