Biology - Study Mode

[#126] Which letter indicates systolic pressure?
Correct Answer

(D) A

Explanation

Solution: Letter A indicates systolic pressure.

[#127] The first heart transplantation was performed by
Correct Answer

(D) Dr. C. Barnard

Explanation

Solution: Christiaan Barnard with his team, performed the world's first human-to-human heart transplant operation on 3 December 1967.

[#128] Which of the following is true about blood plasma?
Correct Answer

(D) It is about 90% water

Explanation

Solution: The first option is incorrect because it is devoid of blood cell, also red blood cells so doesn’t contains haemoglobin.

The second option is incorrect because plasma is colorless.

The third option is also incorrect because plasma contains the clotting factors.

[#129] Most of the oxygen transported by the blood is
Correct Answer

(A) Bound to haemoglobin

Explanation

Solution: Oxygen is carried in the blood in two forms: (1) dissolved in plasma and RBC water (about 2% of the total) and (2) reversibly bound to hemoglobin (about 98% of the total).

[#130] The audible sounds of heart are made by the closing of the
Correct Answer

(C) Valve

Explanation

Solution: Closure of the heart valves is associated with an audible sound, called the heartbeat.