OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Get ready for the OCR GCSE Biology exam with our comprehensive quiz, featuring flashcards and multiple choice questions. Understand the exam format, key topics, and effective study strategies to excel.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

How is heat primarily carried throughout the body?

Through nerve signals
Within the plasma of the blood cells
By skin contact
Via the lymphatic system

The correct answer is: Within the plasma of the blood cells

Heat is primarily carried throughout the body within the plasma of the blood cells. This process occurs through the circulatory system, where blood, which is a liquid connective tissue, transports heat generated by metabolic processes in various tissues. As blood flows through the body, it absorbs heat from organs and muscles and redistributes it to different areas, helping to maintain a stable internal body temperature. The other options do play roles in the overall functioning of the body, but they are not the primary means of heat transport. Nerve signals can trigger responses related to temperature regulation, skin contact can facilitate heat exchange with the environment, and the lymphatic system is involved in immune responses and fluid balance rather than heat transport.