21.3 Test

What is sensing and processing information, and controlling body activities?

• endocrine system
• integumentary system
• muscular system
• nervous system
• skeletal system

What is supporting the body and allowing movement?

• endocrine system
• integumentary system
• muscular system
• nervous system
• skeletal system

What is moving the body and specific body organs?

• endocrine system
• integumentary system
• muscular system
• nervous system
• skeletal system

What is covering and protecting the body?

• endocrine system
• integumentary system
• muscular system
• nervous system
• skeletal system

What is regulating body functions with chemical messengers?

• endocrine system
• integumentary system
• muscular system
• nervous system
• skeletal system

The human nervous system is made of a huge number of interconnected neurons. The two main divisions of the nervous system are the central nervous system (CNS) and the peripheral nervous system (PNS). Which describes a common pathway of nerve impulses through the divisions of the nervous system?

• CNS → sensory neurons of the PNS → motor neurons of the PNS
• sensory neurons of the PNS → CNS → motor neurons of the PNS
• sensory neurons of the PNS → motor neurons of the PNS → CNS
• motor neurons of the PNS → CNS → sensory neurons of the PNS

The adult human skeletal system consists of 206 bones, all of which are hard and sturdy. Which statement accurately describes the make-up of bones?

• Bones are secretions that do not contain living cells or tissues.
• Bones are organs made of one type of tissue only, and have a homogeneous consistency.
• Bones are organs made of a variety of living tissues.
• Bones are living tissues made of one type of cell only.

A scientist is using a light microscope to observe a sample of muscle tissue. By analyzing the cellular structure and organization of the muscle tissue, the scientist can identify which of these properties?

• the age of the donor
• how frequently the muscle was used
• whether the muscle was located in the arms, legs, or torso
• whether the muscle moved the skeleton, the heart, or another type of internal organ

The brain of the nervous system and the endocrine glands of the endocrine system are similar to one another in certain ways. Both act to send messages to distant body parts. What is a significant difference of the activity of endocrine glands?

• Endocrine glands send chemical messengers through the blood.
• Endocrine glands send electrical signals through neural pathways.
• The effects of endocrine glands tend to be short-lasting and easily reversible.
• The effects of endocrine glands tend to involve only the muscular and skeletal systems.

What is the primary function of the nervous system?

• To produce hormones
• To collect, process, and respond to information
• To transport blood throughout the body
• To filter waste from the body