Which row in the table shows the typical blood pressure in a blood vessel of a young adult during the cardiac cycle? | Blood pressure (mmHg) | Blood vessel | Cardiac cycle stage | |-----------------------|--------------|---------------------| | A | 80 | vein | diastole | | B | artery | systole | | C | 120 | vein | diastole | | D | 120 | artery | systole | - Scottish Highers Human Biology - Question 15 - 2022

To determine the typical blood pressure in a blood vessel of a young adult during the cardiac cycle, it is essential to recognize the stages and types of blood vessels.

1. Systole refers to the phase of the cardiac cycle when the heart contracts and pumps blood, resulting in higher blood pressure in arteries. Typical systolic pressure in a young adult's arteries is around 120 mmHg.
2. Diastole is the relaxation phase, where the pressure in the vessels is lower, commonly at about 80 mmHg in veins.

From the options:

• Row A shows 80 mmHg in a vein during diastole, which is plausible but not an artery.
• Row B shows systolic pressure in an artery but with the incorrect value of blood pressure.
• Row C indicates a vein with diastolic pressure, again incorrect for an artery.
• Row D correctly states the systolic pressure of 120 mmHg in an artery during systole, which aligns with normal physiology.

Therefore, the correct row showing the typical blood pressure during the cardiac cycle is D: 120 mmHg, artery, systole.