AQA Biology GCSE Topic 5: Homeostasis and Response

Flashcards covering key concepts in AQA Biology GCSE Topic 5: Homeostasis and Response.

Homeostasis is the maintenance of a __ internal environment.

constant

In the human body, homeostasis controls blood glucose concentration, body __, and water levels.

temperature

Receptors detect __ in the environment.

stimuli

The __ centre processes information received from receptors.

coordination

The most important function of the human nervous system is to allow organisms to __ to their surroundings.

react

Reflexes are automatic responses that help prevent __.

harm

The __ is part of the central nervous system, controlling complex behaviours.

brain

The outer part of the brain responsible for consciousness and memory is called the __ cortex.

cerebral

The eye is sensitive to light intensity and __.

colour

The __ is the layer of light sensitive cells found at the back of the eye.

retina

A __ is used in the eye to change the shape of the lens for focusing.

ciliary muscle

Short sightedness is also known as __.

myopia

The main male reproductive hormone is __.

testosterone

The side effects of the contraceptive pill may include changes in __.

mood

Insulin is produced by the __ to control blood glucose levels.

pancreas

ADH (anti-diuretic hormone) increases the permeability of kidney tubules to __.

water

The process by which water moves from high to low concentration is called __.

osmosis

The kidneys filter waste products and maintain the balance of __ in the body.

water

In the menstrual cycle, __ stimulating hormone (FSH) causes the maturation of an egg.

follicle

The plant hormone __ controls growth and the response to environmental stimuli.

auxin