AnswersEAP-Biology B CRThe Central Nervous System

The Central Nervous System — Test Answers

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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

A student makes the analogy that the cardiovascular system is like a highway. Why is this a good analogy?

A
Blood is made of many different kinds of cells.
B
The heart pumps blood through the veins.
C
The heart is centralized in the body.
D
Blood transports materials to and from different parts of the body.
6

Fred is studying his notes from anatomy class. One list in his notes describes features of a CNS structure. anterior horns and posterior hornsgray matter inside, white matter outsidehippocampuscentral canalFred thinks this list contains an error. Which best describes the error?

A
Most items are features in the brain, but the gray and white matter locations correspond to the spinal cord.
B
Most items are features in the brain, but the horns are in the spinal cord.
C
Most items are features in the spinal cord, but the central canal is in the brain.
D
Most items are features in the spinal cord, but the hippocampus is in the brain.
9

Charles is an engineer who is evaluating a prototype of an artificial heart. The prototype beats in a synchronized fashion, is hollow, and has tubes attached to it. It can be powered by electrical signals from the brain when it is interfaced with the appropriate nerves. What important feature should Charles notice the prototype is missing?

A
blood vessels to transport blood
B
a structure that would divide the hollow heart into chambers to separate oxygenated blood from deoxygenated blood
C
a blood filtering mechanism to separate oxygenated blood from deoxygenated blood
D
a structure to pump blood through the valves
10

Kyle explains that the body of an airplane is like the appendicular skeleton and the wings of an airplane are like the axial skeleton. Which demonstrates how he could change his statement so it is accurate?

A
Airplanes are not like skeletons.
B
The body of an airplane is like the axial skeleton, and the wings are like the appendicular skeleton.
C
The body of an airplane is like the appendicular skeleton, and the tail is like the axial skeleton.
D
Both the body and wings of an airplane are like the axial skeleton.
12

Jonas states four interesting facts about bones. Which of Jonas’s statements is incorrect?

A
Some bones have holes through them.
B
Bones are made mostly of sugars.
C
Bones are made of layers.
D
Bones can have different shapes.
13

PeristalsisSalivationDigestionSecretion

A
Peristalsis
B
Salivation
C
Digestion
D
Secretion
15

How does the cardiovascular system help the body maintain homeostasis?

A
osmosis and capillary action
B
capillary action and thermoregulation
C
thermoregulation and hormone transport
D
hormone transport and osmosis
16

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.

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