Name the following:

Chemical substances produced by microorganisms which kill or inhibit the growth of other microorganisms.

Name the following:

Hormone which helps to increase the reabsorption of water from the kidney tubules.

Name the following:

Phase of cardiac cycle in which the auricles contract.

Name the following:

Organ where urea is produced.

Name the following:

Phenomenon by which living or dead cells absorb water by surface attraction. 

Give the biological/technical terms for the following:

Membrane which allows the passage of molecules selectively.

Give the biological/technical terms for the following:

Suppressed allele of a gene.

Give the biological/technical terms for the following:

Structure which carries visual stimuli from the retina to the brain.

Give the biological/technical terms for the following:

Give the biological/technical terms for the following:

Protective coverings located around the human brain and spinal cord.