biology 2025 term 4

Negative feedback

the mechanism that counteracts a stimulus

Regulation

A control of conditions to maintain homeostasis

Hormones

signaling molecules that regulate the activity of target cells

Glands

groups of cells that secrete chemical substances

endocrine system

collection of glands responsible for sending and receiving hormones

Neuron

a specialised cell that receives and sends messages, also known as a nerve cell

Nervous system

collection of brain,spinal cords and nerves that detect sensory information and coordinate actions

Homeostasis

the maintenance of a stable internal environment

stimulus

a event that triggers a response

systems

collection of tissues and organs responsible for performance life functions

stimulus- response model

a model that describes how a system response to a stimulus

e.g stimulus-receptor-command center-effector-response

metabolism

energy-making reactions in the body

blood pressure

the pressure that circulating blood applies to the walls of blood vessels (arteries)

respiration

the process where mitochondria within cells convert glucose into energy

pharmaceoticals

a variety of medicines used to prevent, treat or cure disorders. also known as medication

diabetes-induced blindness

a disorder of the eye caused by diabetes, resulitng in partical or complete blindness

insulin

one of the two hormones responsible for maintaing blood glucose levels

diabetes

disorders that disrupts blood glucose regulation. includes type 1 and type 2.

hypothermia

a medical emergency where the body overworks to retain heart after exposure to extremely cold conditions

symptoms

physical or mental signs of and illness or injury