Know Your Systems
Which body system transports oxygen, nutrients, and hormones throughout the body?
Circulatory system
Which two body systems work together to deliver oxygen from the lungs to body cells?
Answer: Respiratory and circulatory systems
What is the maintenance of relatively stable internal conditions called?
Homeostasis
What are the tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged?
Answer: Alveoli
A student's heart rate and breathing rate increase while running. Which two body systems are working together?
Answer: Circulatory and respiratory systems
Which body system produces and releases hormones?
Endocrine system
Which two body systems work together to absorb nutrients and transport them to body cells?
Answer: Digestive and circulatory systems
What process cools the body when sweat evaporates from the skin?
sweating
What are the fingerlike projections in the small intestine that increase nutrient absorption?
Answer: Villi
A horse swishes its tail after sensing a fly. Which two systems detect the stimulus and produce movement?
Answer: Nervous and muscular systems
Which body system detects stimuli and sends signals to coordinate responses?
Nervous system
Which two body systems work together when you touch something hot and quickly pull your hand away?
Nervous and muscular systems
What response helps the body generate heat when it becomes too cold?
Answer: Shivering
Which muscle contracts to expand the chest cavity during inhalation?
Answer: Diaphragm
The small intestine absorbs nutrients. Which body system transports those nutrients throughout the body?
Answer: Circulatory system
Which body system breaks down food and absorbs nutrients?
Digestive system
Which two body systems coordinate sweating when body temperature increases?
Answer: Nervous and integumentary systems
What is the widening of blood vessels called?
Answer: Vasodilation
Which organs filter metabolic wastes from the blood?
Answer: Kidneys
Blood calcium levels drop, causing bones to release calcium. What internal condition is the body trying to maintain?
Answer: Blood calcium homeostasis
Which body system removes metabolic wastes from the blood and regulates water balance?
Excretory System
The nervous system signals glands to release adrenaline. Which body system contains these glands?
Answer: Endocrine system
What type of feedback reverses a change to return conditions toward normal?
Answer: Negative feedback
Which glands release hormones that help increase blood calcium when it becomes too low?
Answer: Parathyroid glands
A person becomes dehydrated, so the kidneys conserve water. What process is the body maintaining?
Answer: Homeostasis