disease and homeostasis sch

Part of your body that has nerve cells that are damaged and cause alzheimers disease

Brain - cerebrum

How does insulin’s help people with diabetes

Insulin controls the blood sugar, your body naturally exerts insulin but with diabetes it does not so insulin is the way for someone with diabetes to lower their blood sugar

How does your body cool down

The body cools down by sweating and opening blood vessels

How is water lost in the body

Water is lost through sweat, urine and breath

What are the role of hormones in the body

Hormones are chemical messengers made by glands that travel though the bloodstream to control and coordinate important body functions - like growth, metabolism, mood and reproduction

Endocrine system

The endocrine system uses hormones that travel through the blood to control slow, long-term processes like growth and metabolism

Nervous system

the nervous system uses electrical signals through nerves for fast, short-term responses like reflexes or movement.

What is influenced by the endocrine system/ not influenced

Influenced - growth, metabolism, blood sugar, reproduction. Not influenced - reflexes, voluntary movement, breathing rate.

What is a stimulus

A stimulus is any change in the environment (internal or external) that triggers a response from the body, like touching something hot or feeling hungry.

What is a virus

A virus is a tiny infectious particle that cannot reproduce on its own. It invades living cells and uses the cell’s machinery to multiply, often causing disease.

How are infectious diseases caught

They are caught through contact, air, water, or vectors like mosquitoes, contaminated food, or surfaces.

What is the process that happens when sugary food is eaten and the role of negative feedback in this process

Blood sugar rises → insulin released → sugar enters cells → blood sugar lowers (negative feedback), keeping energy levels stable.

What is homeostasis

Homeostasis is maintaining stable internal conditions, like temperature, water balance, and blood sugar, despite external changes.

How to label a motor neuron

A motor neuron has cell body, dendrites, axon, axon terminals, and carries signals from the brain to muscles.

Involuntary actions

Breathing, heartbeat and digestion

What part of the brain causes involuntary actions

Brainstem

How is water lost in our body and how is it replaced

Water is lost via sweat, urine, breath and is replaced by drinking liquids and water rich foods

What is caused from bacteria

Strep throat, pneumonia and food poisoning

What is caused by viruses

Flu, measles and Covid 19

What is caused by fungi

Ringworm, athletes foot and lung fungus

What is caused by Protozoa

Malaria, giardiasis and sleeping sickness

The role of insulin

Lowers blood sugar by helping cells absorb sugar

Role of glucagon

Raises blood sugar by releasing stored sugar in the liver

what increases ADH in our body, the organ that produces it, and an organ it outworks on

Dehydration increases it, it’s made in the hypothalamus, stored in the pituitary, and acts on the kidneys to conserve water.

Example of negative feedback

Body temperature

Shiver if cold

Sweat if hot

What happens when you are cold

Blood vessels constrict