A silent mutation can result from:

For the action potential to be reached,

Human blood comes in three colors: scarlet red, dark red, and sometimes cherry red. Octopus and horseshoe crab blood is blue in color. Certain body products are also distinctly colored: bile, feces, and urine. Tell me what you know about these pigments.

Steroid hormones affect target organ cells by:

The ‘master gland’ of the endocrine system:

Acetylcholine works:

Using the balance of systems in homeostasis, explain how a person suffering from kidney failure is in serious danger. (T & I/9)

Discuss the contribution of two scientists to the field of genetics.  Include their work, experiments and the significance of their work to our understanding of genetics. (A /7, C /3)

Antidepressants work on the CNS by affecting serotonin levels

Which of the following statements about hormones is incorrect?