alleryIn a healthy resting adult, blood pressure is normally expressed as 120 mm/80 mm Hg. The figure 80 mm Hg in this reading represents which pressure?
ASystolic pressure
BPulse pressure
CVenous pressure
DDiastolic pressure
Answer & Solution
Correct answer: D. Diastolic pressure
1. Blood pressure is written as systolic over diastolic.
2. The higher first number, 120, is the peak during ventricular contraction, the systolic pressure, ruling out option A.
3. Pulse pressure is the difference between the two readings, not 80 itself, so option B is wrong.
4. Venous pressure is the low pressure in veins, not the 80 in this reading, ruling out option C.
5. The lower second number, reached when ventricles relax, is the diastolic pressure, option D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 14 Transportation in Plants and Circulation in Animals "Heart Sound", p.217_
Keep practising Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis
Browse all Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis questions for AP Biology, or explore more Biology topics.
Related questions
Follow the filtrate down to urineWhich protein runs alongside the actin filaments throughout their length?The two parts of a meromyosin are calledThe thick filament of a muscle fibril is a polymer ofIn a resting muscle, the active binding sites on actin are masked byThe thin filament of a muscle fibril is made of two filamentous strands ofThe functional unit of a muscle fibril, lying between two successive Z-lines, is theThe dark band of a muscle fibril, containing myosin, is called the