Unit 3 Control and Coordination

Which of the following statements is the best to explain the need for homeostasis to the organism ?

• Avoid sudden death

• Maintain constant body temperature

• Ensure that all enzymes involved in chemical reactions work well

• Provides optimum internal environment for efficient metabolic activity

Tags

NGSS.HS-LS1-3

All chemical reactions in living cells are controlled by _________________ that are sensitive to surrounding changes.

• brain

• nerve

• fluids

• enzymes

Tags

NGSS.HS-LS2-5

What is the corrective mechanism occurred when body temperature decrease from the normal ?

• Sweating

• Hair bends

• Blood vessels will contract

• The skeletal muscles are not active

Tags

NGSS.HS-LS1-3

Which of the following helps in the regulation of body temperature?

• Brain

• Lung

• Stomach

• Liver

Tags

NGSS.HS-LS1-3

Which of the following helps in the homeostasis control process?

• P, Q and R only

• P, R and S only

• Q, R and S only

• P, Q, R and S

Tags

NGSS.HS-LS1-3

When performing active activities such as running 100m, the heart rate increases faster than in rest. Which of the following statements accurately describes this situation?

• Keep the body temperature constant

• Maintain water content in the body

• More oxygen can be forced into the lungs

• Ensure that all parts of the body receive the supply of oxygen and nutrients quickly

Tags

NGSS.HS-LS1-3

When the temperature is too high, why the stoma closes?

• To reduce water evaporated from the leaves through transpiration.

• To increase water evaporated from the leaves through transpiration.

Tags

NGSS.HS-LS1-3

Aiman is basking under sunlight. Which of the following is the corrective mechanism faced by Aiman?

• Skeletal muscles contract and relax actively

• Hairs stand erect

• Blood vessels dilate

• Decrease sweating

Tags

NGSS.HS-LS1-3

Homeostasis does not occur in plants

• True

• False

Tags

NGSS.HS-LS1-3

NGSS.HS-LS2-5

Which part of the human brain is primarily responsible for maintaining balance and coordination?

• Cerebrum

• Cerebellum

• Medulla oblongata

• Hypothalamus