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Edexcel Biology Gcse - Homeostasis in Humans Part 1

Biology25 CardsCreated about 1 month ago

This deck covers key concepts related to homeostasis in humans, including definitions and functions of various biological terms and processes.

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ADH definition

A hormone produced in the pituitary gland that controls the volume and concentration of urine.
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Key Terms

Term
Definition
ADH definition
A hormone produced in the pituitary gland that controls the volume and concentration of urine.
anti-coagulant drugs definition
Substance that prevents blood clotting.
antigen definition
A foreign organism that gets into the body and triggers an immune response.
blood plasma definition
The liquid part of the blood containing useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste materia...
contract definition
A muscle tenses as fibres shorten or create tension.
dialysis definition
Medical treatment in which blood is removed from the body and filtered before being returned.
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Edexcel Biology Gcse - Homeostasis in Humans Part 1
TermDefinition
ADH definition
A hormone produced in the pituitary gland that controls the volume and concentration of urine.
anti-coagulant drugs definition
Substance that prevents blood clotting.
antigen definition
A foreign organism that gets into the body and triggers an immune response.
blood plasma definition
The liquid part of the blood containing useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste materials such as urea.
contract definition
A muscle tenses as fibres shorten or create tension.
dialysis definition
Medical treatment in which blood is removed from the body and filtered before being returned.
digestion definition
The breakdown of large insoluble food molecules to smaller soluble ones.
effector definition
The organ, tissue or cell that produces a response.
exhale definition
Discharged as waste
homeostasis definition
The maintenance of steady conditions. The ability of the body to maintain a constant internal environment, eg temperature and blood glucose concentration.
hypothalamus definition
The part of the brain that detects changes in blood temperature and water concentration.
nerve impulses definition
Electrical signals that travel along the nerve fibre from one end of the nerve cell to the other.
nervous system definition
Body system that includes the brain, spinal cord and nerves.
osmoregulation definition
A form of homeostasis which controls the volume of water in the body.
permiable definition
A substance which allows fluids or gases to pass through it.
protease definition
Enzyme that breaks down proteins.
receptor definition
Organ, tissue or cell that detects a stimulus.
toxic definition
Poisonous
urea definition
A nitrogenous waste product resulting from the breakdown of proteins. It is excreted in urine.
vascoconstriction definition
Narrowing of arterioles supplying the skin’s blood capillaries, causing less blood to flow.
vasodilation definition
The increase in diameter of the skin arterioles to increase blood flow and increase heat loss by radiation.
Homeostasis nervous system hormones
The conditions inside our body must be carefully controlled to allow it to function effectively. Homeostasis is the maintenance of a constant internal environment in the body. The nervous system and hormones are responsible for controlling this.
The body control systems are all automatic, and involve both nervous and chemical responses. It has many important parts, including: (basic)
Receptors Coordination centres Effectors
The body control systems are all automatic, and involve both nervous and chemical responses. It has many important parts, including:
Receptors detect a stimulus, which is a change in the environment, such as temperature change Coordination centres in the brain, spinal cord and pancreas. They receive information from the receptors, process the information and instigate a response. Effectors, such as muscles or glands create the response. Glands often release a hormone, which would restore the optimum condition again.
Receptor | definition
Receptors detect a stimulus, which is a change in the environment, such as temperature change