Chemistry- biology

growth hormone

pituitary gland

adrenal gland

adrenalin

thyroid

thyroxin

pancreas

insulin

homeostasis

maintenance of relatively constant environments in the body

testes

testosterone

ovaries

oestrogen

central nervous system

the spinal cord and brain, has nerves running up and down it.

peripheral nervous system

the nerves branching off from the cns, all over the body

stimulus

detectable change (physical or chemical) in the environment of an organism that results in some functional activity

receptor

 a cell or group of cells that receives stimuli : sense organ

effector

muscles and glands - that produce a specific response to a detected stimulus

negative feedback

 when the product of a reaction leads to a decrease in that reaction

How does the human body respond to the ‘cold’?

it constricts the blood vessels, causing goosebumps, and, it causes shivering, both of these increase body heat.

What are the parts of a typical neuron?

There are dendrites, axon, and a cellbody.

synapse

space between two neurons

neurotransmitters

help to transmit signals between synapses

hypothalmus

chooses when to release hormones

Why is the pituitary called the ‘master gland’?

The pituitary gland regulates growth, reproduction, and metabolism

What is a ‘flight or flight’ reaction

the reaction that happens when a human is in direct immediate danger

What is a reflex arc?

a diagram used to show the reaction of the body

cerebellum

controls muscle control, keeps us standing.

cerebrum

initiates and coordinates movement, enable speech, judgment, thinking and reasoning, problem-solving, emotions and learning.

brainstem

sends signals from your brain to the rest of your body.