Free Body Fluids And Circulation (Daily Quiz: 4) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

If due to some injury, the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

(a) The flow of blood into the aorta will be slowed down.

(b) The flow of blood into the pulmonary artery will be reduced.

(c) The ‘pacemaker’ will stop working.

(d) The blood will tend to flow back into the left atrium.

Question-2

Which one of the following is correct?

(a) Serum = Blood + Fibrinogen

(b) Plasma = Blood − Lymphocytes

(c) Lymph = Plasma + RBC + WBC

(d) Blood = Plasma + RBC + WBC + Platelets

Question-3

The heart sound 'dup' is produced when

(a) semi-lunar valves at the base of aorta get closed

(b) mitral valve is closed

(c) tricuspid valve is opened

(d) mitral valve is opened

Question-4

Heartbeat increases

(a) On stimulation of vagus nerve (parasympathetic nerve)

(b) on stimulation of sympathetic nerves

(c) By adrenalin secreted by adrenal medulla

(d) Both (b) and (c)

Question-5

Assertion:
When heart stops beating it is known as cardiac arrest.
Reason:
Heart attack occur due to cardic arrest.

(a) If both the assertion and reason are true but the reason is not a correct explanation of the assertion.

(b) If both the assertion and the reason are true and the reason is a correct explanation of the assertion.

(c) If the assertion is true but the reason is false.

(d) If both the assertion and reason are false.