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Define the term gland and give two examples of endocrine glands in the human body.

Definition: an organ or tissue that synthesises and secretes a chemical messenger such as a hormone into the blood plasma.Examples: pituitary gland, thyroid gland (other relevant).
Answered by • Biology tutor
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What are the chambers of the heart, and describe the blood flow through the heart?

The right atrium, right ventricle, left atrium and left ventricle Deoxygenated blood enters the hearts right atrium via the superior and inferior vena cava, then is pumped to the right ventricle (through the...
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Answered by Nicole A. • Biology tutor
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Describe the adaptations of the small intestine to help perform it's function

The small intestine is an organ which absorbs the products of digestion (sugars and amino acids etc) into the blood. One of the primary functions of the small intestine is to act as a large surface for absor...
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Answered by Conrad W. • Biology tutor
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Compare anaerobic respiration in a yeast cell with anaerobic respiration in a muscle cell (3 marks)

This is a comparison question therefore all statements must compare the two types of cells in the question- muscle and yeast. This question is worth 3 marks so we should give 3 statements. What do we know ab...
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Answered by Megan L. • Biology tutor
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Explain why poor diet can cause a change in the number of red blood cells.

Iron in an essential micronutrient that can be obtained from the diet of an individual. Foods that are high in iron include red meat, dark green leaf vegetables such as spinach , and legumes. Having a poor d...
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