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What are the events in the cardiac cycle?

The cardiac cycle is the series of events that leads to blood being pumped to the lungs and around the body.

The cycle begins with the SAN (sino-atrial node). This is the hearts 'pacemake...

Answered by Thomas C. • Biology tutor

8262 Views

How do white blood cells protect us from infection?

Sometimes microorganisms are able to make it past the body's external defences (i.e. the skin) the body's immune system must defend the body.

White blood cells are really important in the...

Answered by Thomas C. • Biology tutor

23848 Views

How do we regulate body temperature?

Homeostasis, the regulation of stable body conditions, includes control of body temperature. We function efficiently at 37 degrees celsius, as our proteins and enzymes work best at this temperature.

Answered by Sophie S. • Biology tutor

4479 Views

What is magnification of a microscope vs. the resolution?

Magnification

The magnification is how much bigger a sample object appears under the microscope than it does in real life.

Sometimes the total magnification may depe...

Answered by Sophie S. • Biology tutor

5737 Views

What is the difference the secondary structure and tertiary structure of a protein?

Secondary Structure
The secondary structure of a protein refers to the basic foldings of a protein the forms of:
1. an alpha helix
...

Answered by Daniella A. • Biology tutor

7774 Views

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