Unit 3 Test (7th)

Nutrition is important for athletes competing at high levels. Some athletes eat __________ before a competition because this nutrient supplies quick energy.

• Protein

• Carbohydrates

• Vitamins

• Fats

Tags

NGSS.MS-LS1-7

The pancreas makes __________, a chemical that monitors blood sugar levels.

• Bile

• Trypsin

• Insulin

• Glucagon

• Enzyme

Based on its function, the gizzard is part of the __________ system.

• Circulatory

• Digestive

• Respiratory

• Nervous

Single-celled organisms such as bacteria perform every function needed for life in their one cell. Why do animals such as humans need levels of organization?

• To perform complex functions

• To increase cell size

• To reduce energy consumption

• To eliminate waste

Tags

NGSS.MS-LS1-3

The digestive system doesn’t work alone. After nutrients are absorbed in the small intestine, which body system becomes involved in the process?

• Respiratory

• Lymphatic

• Endocrine

• Circulatory

Nutrient distribution depends on which system to deliver nutrients to cells around the body through the bloodstream?

• Respiratory

• Lymphatic

• Endocrine

• Circulatory

What type of system is the human heart considered to be?

• Single loop system

• Triple loop system

• Double loop system

• Quadruple loop system

Why is the human heart called a double loop system?

• There are two sections, or loops, that each have the same job in the circulatory system.

• One loop passes through the heart on the way to the body, and the other loop passes through the body to the lungs.

• One loop takes blood with oxygen to the lungs, and the other loop takes blood and wastes to the body.

• One loop takes blood with wastes to the lungs, and the other loop takes blood with oxygen to the body.

Which part of the circulatory system has more muscular walls due to increased pressure from the pumping heart?

• Veins

• Arteries

• Capillaries

• Ventricles

Your heart is a powerful, fist-shaped muscle that beats 100,000 times a day to power the circulatory system. Which of the following are functions of the circulatory system? Select all that apply.

• bringing oxygen to cells

• helping fight off diseases and infections

• transporting nutrients

• removing wastes from the body

• breaking down nutrients

Tags

NGSS.MS-LS1-3