biology - homeostatus and nervous system Flashcards
What term is used to describe the regulation of the internal conditions of a cell or organism
Homeostasis
Name two factors that affect homeostasis
eating , drinking
what internal conditions need to be controlled
Blood glucose concentration, body temperature and water levels
what regulates homeostasis
the nervous system
what parts make up the central nervous system
brain and spinal cord
what do we call a rapid automatic response to a stimulus that does not involve the brain
reflex response
what do you call a change in the external or internal environment
stimulus
what detects a stimuli
receptor cells
why do we need reflex responses
to protect the body from harm
name three types of neurone found in a reflex arc
sensory, relay and motor neurone
what is the sequence of events that happen once a stimulus has been detected referred to
A reflex arc
how many stages are in a reflex arc
7
in the correct order name the 7 stages of a reflex arc
stimuli-receptor-sensory neurone- relay neurone - motor neurone- effector- response
an effector can be either?
a muscle or a gland
what is a junction where two neurones meet
synapse
what is the chemical called that releases a synapse
a chemical transmitter
name the system that controls the release of hormones
the endocrine system
where are the hormones released from
the endocrine glands
how are hormones transported in the body
through the blood
what do you call a cell that respond to a hormone
target cell
which gland is called the master gland
pituitary
