Download Lesson 3 | The Endocrine System

Name
Date
Class
Content Vocabulary
LESSON 3
The Endocrine System
Directions: In this word search puzzle, find and circle the four terms listed below. Then put the terms that match each
definition on the lines provided.
endocrine system
hormone
negative feedback
positive feedback
1. The type of feedback system used with Oxytocin during childbirth: _______________
2. The type of feedback system where hormones are only released when needed :
___________________
3. The body system responsible for releasing hormones into the blood:
___________________________________
4. The chemical signals released by endocrine cells:
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Control and Coordination
Name
Date
Class
Key Concept Builder
LESSON 3
The Endocrine System
Key Concept What does the endocrine system do?
Directions: Use the terms below to complete the following paragraphs. Each term is used only once.
body
growth
cells
hormones
The (1.)
chemical
nervous
effects
organs
endocrine
tissues
glands
system consists of various
(2.)
and (3.)
, called
(4.)
, that release (5.)
into the body. These molecules are called (6.)
messages
.
This system operates less rapidly than the (7.)
system.
The messages take more time to go from one part of the (8.)
another, and they usually produce more gradual (9.)
to
, such as
stimulating (10.)
. In addition, the messages usually affect
many more (11.)
.
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Control and Coordination
Name
Date
Class
Key Concept Builder
LESSON 3
The Endocrine System
Key Concept What does the endocrine system do?
Directions: On the line before each definition, write the letter of the term that matches it correctly. Each
term is used only once.
1. controls the body’s energy use
A. pancreas
B. hypothalamus
2. controls the pituitary gland
C. thymus gland
D. parathyroid glands
3. releases testosterone and produces sperm cells
E. testes
F. pituitary gland
4. secretes insulin and glucagon
G. adrenal glands
H. ovaries
5. releases estrogen and produces egg cells
I. thyroid gland
6. regulates calcium release
7. secretes growth hormone and controls other
endocrine glands
8. releases stress-response hormones
9. stimulates the immune system
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Control and Coordination
Name
Date
Key Concept Builder
Class
LESSON 3
The Endocrine System
Key Concept How does the endocrine system interact with other body systems?
Directions: Circle the term in parentheses that correctly completes each sentence.
1. The body can respond to a (stimulus/reaction) through the nervous system and
through the endocrine system.
2. Glands help maintain homeostasis by releasing (cells/hormones) that regulate
internal conditions.
3. Negative feedback systems are comparable to a (thermostat/furnace) in a house.
4. In a negative feedback system, the effect of a hormone (stimulates/inhibits) further
release of the hormone.
5. In a positive feedback system, the effect of a hormone causes (more/less) of the
hormone to be released.
6. Hormone release during childbirth is an example of (positive/negative) feedback.
Control and Coordination
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