Unit Test — Unit test Answers

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The lungs, nose, and trachea are organs of the respiratory system. Which best describes these organs?

A
They deliver nutrients to the other tissues.
B
They deliver oxygen to the blood.
C
They are both used for support.
D
They help break down food.
4

Which blood component makes up 41% of the blood’s volume?

A
plasma
B
red blood cells
C
platelets
D
white blood cells
5

Lewis is exercising and his muscles need oxygen. Which best describes how systems interact to bring his body into homeostasis?

A
The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the muscular system.
B
The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system.
C
The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the skeletal system.
D
The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the skeletal system.
7

dendriteneuronreceptorstimulus

A
dendrite
B
neuron
C
receptor
D
stimulus
8

PeristalsisSalivationDigestionSecretion

A
Peristalsis
B
Salivation
C
Digestion
D
Secretion
12

Which is the pathway for information through a neuron?

A
dendrite → axon → cell body → axon terminals
B
axon terminals → axon → cell body → dendrite
C
dendrite → cell body → axon → axon terminals
D
cell body → dendrite → axon → axon terminals
13

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. By changing the amount of water in the blood, blood pressure can change. The excretory system can help to lower blood pressure.Which would most likely occur in the kidney?

A
More water would be transferred from the nephron.
B
Less water would be absorbed into the nephron.
C
The amount of water in the bladder would decrease.
D
The amount of water in the blood would increase.
15

Neurons and neuroglia work together to form nervous tissue, which is part of the nervous system. Which describes neurons and neuroglia?

A
They are specialized organs that form an organ system.
B
They are organs that form tissue.
C
They are specialized tissues that form an organ system.
D
They are cells that form tissue.
16

Once the body has begun shivering, what happens to make it stop shivering?

A
When body temperature returns to normal, the respiratory system sends a message to the skeletal system to stop shivering.
B
When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shivering.
C
When body temperature is below normal, the nervous system sends a message to the skeletal system to stop shivering.
D
When body temperature is below normal, the respiratory system sends a message to the muscular system to stop shivering.
17

What is the main function of the central nervous system?

A
providing energy to cells
B
processing information
C
exchanging gases
D
delivering nutrients throughout the body
18

brainspinal cordperipheral nervous systemcirculatory system

A
brain
B
spinal cord
C
peripheral nervous system
D
circulatory system

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