Homeostasis Quiz

What does homeostasis mean in the context of living things?

• The reactions that need to occur to maintain energy

• The reactions that need to occur to maintain balance

• The reactions that need to occur to maintain growth

• The reactions that need to occur to maintain reproduction

What is the body's counteraction when it is dehydrated?

• The body feels hungry

• The body feels sleepy

• The body feels thirsty

• The body feels overheated

What happens when the body is overheating?

• The body starts to shiver

• The body increases water absorption

• The body begins to sweat

• The body stops all movement

Which system in the body sends or receives signals using chemicals called hormones?

• Digestive system

• Nervous system

• Endocrine system

• Respiratory system

What secretes hormones in animals?

• Bones

• Muscles

• Glands

• Organs

What are target tissues?

Label the major gland indicated by the arrow pointing to the gland located in the neck, just below the larynx.

• Pineal gland

• Pituitary gland

• Thyroid gland

• Thymus gland

What is a negative feedback loop?

• A process that promotes a change to occur in the body.

• A regulation where the body reverses a change to keep internal levels at a set point.

• A cycle that continuously increases the output without a set point.

• A loop where the body temperature always rises.

What happens in the body when the temperature falls according to the negative feedback loop?

• Blood vessels dilate and sweating occurs.

• Blood vessels constrict and shivering occurs.

• Heat is generated and retained without any change.

• Muscle contractions stop to conserve heat.

What is the analogy used to explain a negative feedback loop?

• A smoke alarm senses smoke and alerts the homeowners.

• A thermostat detects a temperature rise and turns the cooling on.

• A car alarm goes off when it detects movement.

• A light sensor turns off the lights when it detects daylight.