Physiology - Exam 1

natural phenomena

Science is the mechanism for learning about through observation and experimentation.

Fats

often made of triglycerides; includes steroids, phospholipids.

chemical reactions

All that occur within an organism.

tissues

Cells makes up , which makes up organs, which makes up organ systems.

Autotrophs

are able to make their own food through photosynthesis while heterotrophs can not make their own food and consume .

Any chemical messenger

produced by neuron.

Enzymes

act as a catalyst to lower the activation energy needed for a reaction.

Non science

(Theory, hypothesis) is any system of knowledge or thought that can not be addressed by the scientific method.

product of a reaction leads to an increase in reaction (lactation

child stimulates milk production which causes further production)

Body cavities

cranial, thoracic, abdominopelvic

Body Fluid

Extracellular fluid (blood plasma, intersitial fluid), Cells (intracellular fluid)

form direct cytoplasmic connections between adjacent cells; found in

multi-unit smooth muscle

require interaction between membrane molecules on two cells; N-CAMs

nerve cell adhesion molecules

2 types

catecholamines and thyroid hormones; modifications of single amino acids; released from cell via exocytosis