bio final short response

negative feedback + example

It shuts off the original effect of the stimulus or reduces intensity. An example would be drinking water when thirsty because it shuts off the reaction.

explain action of an enzyme

Enzymes are globular proteins that act as biological catalysts to regulate and speed up rate of chemical reactions. A substrate binds to enzyme active site, temporarily forming an enzyme-substrate complex, enzyme-substrate complex undergoes internal rearrangements from a product, enzyme releases production.

What would happen to a cell in a hypertonic solution?

The cell would shrink because it would lose water.

What would happen to a cell in a hypotonic solution?

Water would move into the cell by osmosis causing it to swell.

Epithelial

cover

Muscular

movement

Connective

supports

Nervous

controls

excretion (function of skin)

eliminates waste

chemical barrier (function of skin)

melanin and secretion

blood reservoir (function of skin)

holds up to 5% of bodys blood supply

physical barrier (function of skin)

continuity and hardness of keratinized cells

skeletal muscle

striated, voluntary

cardiac muscle

striated, involuntary

smooth muscle

nonstriated, involuntary

pain receptors

respond to damaged tissue

mechanoreceptors

respond to pressure, movement, and tension