B1 - Staying in balance Flashcards Preview

Biology - Bethany DONE > B1 - Staying in balance > Flashcards

Flashcards in B1 - Staying in balance Deck (17):

What are the ways you can lose heat?

- sweating
- more blood flow near to the surface of the skin


What are the ways you can gain or keep heat?

- shivering
- exercising
- releasing energy from food
- reduced sweating
- less blood flow near to the surface of skin


What is homeostasis?

Homeostasis is how the body keeps conditions inside it the same. Scientists describe it as the maintenance of a constant internal environment.


What is heat stroke?

When sweating is ineffective and her skin becomes cold and clammy and her pulse is rapid and weak.


What is dehydration?

Dehydration is the loss of too much water.


What is hypothermia?

Hypothermia is a potentially dangerous drop in body temperature, usually caused by prolonged exposure to cold temperatures.


Why is it important that body temperature remains at around 37 degrees?

This is because it is optimum temperature for enzymes.


What is negative feedback?

Negative feedback ensures that, in any control system, changes are reversed and returned back to the set level.


What is the gland called that helps to keep the body in balance?

The hypothalamus gland.


What is vasoconstriction?

Vasoconstriction is the narrowing of blood vessels to prevent any more heat loss.


What is vasodilation?

Vasodilation is the widening of blood vessels so the body loses heat and can cool down.


What is a hormone?

Hormones are made in special glands and are carried in the blood to where they have an effect.


What does insulin control?

Insulin controls the level of glucose in the blood.


What is blood sugar level?

Blood sugar level is the amount of glucose in the body.


What is type 1 diabetes?

Type 1 diabetes is where the body does not make any insulin and can be treated by injections of insulin.


What is type 2 diabetes?

Type 2 diabetes is where the body doesn't produce enough insulin or the cells do not react to it. This is treated by diet.


What happens when the glucose level in the blood is too high?

Insulin converts it into glycogen where it is stored in the liver.