Biology Topic 6.5 Quiz

1.

______ are the part of the nervous system which carry rapid electrical impulses.

Explanation
Neurons are the part of the nervous system that carry rapid electrical impulses. Neurons are specialized cells that transmit information through electrical and chemical signals. They are responsible for transmitting and processing information in the brain and throughout the body. Neurons have a unique structure that allows them to rapidly transmit electrical impulses, making them essential for the functioning of the nervous system.

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2.

The endocrine system consists of glands that release hormones into the blood.

A.

True
B.

False

Correct Answer
A. True

Explanation
The endocrine system is a collection of glands that secrete hormones directly into the bloodstream. These hormones are then transported to various parts of the body to regulate a wide range of physiological processes. This system plays a crucial role in maintaining homeostasis and coordinating the body's responses to internal and external stimuli. Therefore, the statement that the endocrine system consists of glands that release hormones into the blood is correct.

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3.

Type I Diabetes...

A.

Has early onset
B.

Sets in later in life
C.

Beta cells do not produce enough insulin
D.

Target cells become insensitive to insulin
E.

Diet can control the condition

Correct Answer(s)
A. Has early onset
C. Beta cells do not produce enough insulin

Explanation
Type I Diabetes is a condition that has early onset, typically diagnosed in childhood or adolescence. It occurs when the beta cells in the pancreas do not produce enough insulin, which is necessary for regulating blood sugar levels. Unlike Type II Diabetes, where target cells become insensitive to insulin, in Type I Diabetes the main issue lies in the insufficient production of insulin. While diet can play a role in managing the condition, it cannot fully control it as the primary problem is the lack of insulin production.

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4.

Blood glucose levels should stay around 10 to 14 millimoles per dm^3 of blood.

A.

True
B.

False

Correct Answer
B. False

Explanation
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5.

Negative feedback is used to keep the internal environment between limits.

A.

True
B.

False

Correct Answer
A. True

Explanation
Negative feedback is a regulatory mechanism that helps maintain stability and homeostasis within a system. In the context of the internal environment, negative feedback ensures that certain physiological variables remain within acceptable limits. It does so by detecting any deviations from the desired set point and initiating corrective actions to bring the system back to its optimal state. By continuously monitoring and adjusting the internal environment, negative feedback helps prevent extreme fluctuations and maintains overall balance. Therefore, the statement that negative feedback is used to keep the internal environment between limits is true.

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