Science Form 1 Chapter 3 (Homeostasis)

Why does hairs lie flat in hot days?

• add trapped air

• reduce trapped air to easily release heat

• increase body temperature

• increase the water content

You are growing a tomato plant in your house. Which of the following would the plant probably do to help maintain homeostasis?

• Grow away from the light coming from the window

• Grow toward the light coming from the window

• Growth is not affected by the light coming from the window

Below are the corrective mechanism when body temperature decrease, except...

• blood vessels dilate

• decrease sweating

• hairs stand erect

• blood vessels constrict

Why does the blood vessels constrict in the cold?

• increases blood flow to the skin

• Reduces blood pressure to the skin to reduce heat release

• increase oxygen

• avoid injury

During the day, the stoma on the plant will open so that

• increase sunlight

• increase the water absroption

• excess water is evaporated through the process of transpiration

• it attract insect

The process of losing water in plants is called ...

• respiration

• transpiration

• telecomunication

• photosynthesis

All statement below are about transpiration, except...

• produce forces that draws water from stems of plants

• absorb water and mineral

• carry water and mineral from the soil to all parts of plants

• cools plant during hot days

The homeostasis control center is located in ...

• lung

• brain

• heart

• stomach

What is a disease where sufferers cannot control their blood glucose levels?

• Diabetes
• Influenza
• Cholera
• Cystic fibrosis

Which of the following is a physical factor involved in homeostasis?

• The osmosis pressure

• The level of sugar in the blood

• The change in the body temperature

• The change in the water content of the body