An organism that uses light/chemical energy and inorganic molecules to synthesise complex organic molecules.
1 of 14
Heterotroph
An organism that ingests and digests complex organic molecules, releasing the chemical potential energy stored in them.
2 of 14
Photosynthetic Pigments
Molecules that absorb light energy. Each pigment absorbs a different range of wavelengths in the visible region and has its own distinct peak of absorption (other wavelengths are reflected).
3 of 14
Respiratory Substrate
Is an organic substance that can be respired.
4 of 14
Excretion
Is the removal of metabolic waste from the body.
5 of 14
Homeostasis
Is the maintenance of the internal environment of an organism in a constant state despite external changes.
6 of 14
Negative Feedback
A process that brings about the reversal of a change in conditions. It ensures an optimum steady state can be maintained, as the internal environment is returned to its original set of conditions after any change.
7 of 14
Positive Feedback
A process that increases any change detected by the receptors. This tends to be harmful, rare and doesn't lead to homeostasis.
8 of 14
Endocrine Gland
A gland that secretes hormones directly into the bloodstream.
9 of 14
Exocrine Gland
A gland that secretes molecules into a duct that transports them to where they are used.
10 of 14
Hormone
A molecule released by endocrine glands directly into the blood. It acts as a messenger, carrying a signal from the endocrine gland to a specific target organ or tissue.
11 of 14
Target Tissue
A group of cells that possess a specific receptor on their plasma (cell surface) membranes. The shape of the receptor will be complementary to the shape of the hormone molecule.
12 of 14
First Messenger
A hormone that transmits a signal around the body.
13 of 14
Second Messenger
A molecule that transmits a signal inside the cell.
14 of 14
Other cards in this set
Card 2
Front
Heterotroph
Back
An organism that ingests and digests complex organic molecules, releasing the chemical potential energy stored in them.
Comments
No comments have yet been made