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1

Specialized, or differentiated, cells that function together constitute ____________.
A)organs
B)organ systems
C)organisms
D)tissues
2

Undifferentiated cells that retain the ability to become specialized as needed are ___________.
A)stem cells
B)basal cells
C)ectodermal cells
D)connective tissue cells
3

The shape of epithelial cells may be __________.
A)flat
B)cuboidal
C)columnar
D)All of these are correct.
4

Which of these functions is not typical of epithelial tissues?
A)protection
B)contraction
C)secretion
D)absorption
5

Extracellular, proteinaceous fibers are a component of ____________.
A)connective tissues
B)epithelial tissues
C)nervous tissues
D)All of these are correct.
6

Which of these connective tissues has a liquid matrix?
A)adipose tissue
B)blood
C)bone
D)loose connective tissue
7

An increase in the number of _____________ would cause bone to weaken.
A)osteocytes
B)osteoblasts
C)osteoclasts
D)osteogenitor cells
8

The portion(s) of a neuron that receive(s) information from other neurons is/are the ___________.
A)neuroglia
B)cell body
C)axon
D)dendrites
9

Peripheral nerve cells are insulated by neuroglial cells called ____________.
A)microglia
B)oligodendrocytes
C)Schwann cells
D)ependymal cells
10

Voluntary muscle contraction is carried out by ____________ muscles.
A)skeletal
B)cardiac
C)smooth
D)nonstriated
11

The type of muscle found in the digestive tract is __________ muscle.
A)skeletal
B)cardiac
C)smooth
D)striated
12

The first animals to show rudimentary organ systems are the ___________.
A)complex cnidarians
B)sponges
C)choanoflagellates
D)mollusks
13

What human organ system regulates metabolism, development, reproduction, and mental health?
A)nervous system
B)endocrine system
C)digestive system
D)reproductive system
14

What human organ system filters wastes from the blood and keeps electrolytes in balance?
A)reproductive system
B)endocrine system
C)digestive system
D)urinary system
15

True or false. The state of internal constancy is called homeostasis and is usually regulated by negative feedback.
A)True
B)False
16

What cells or tissues are responsible for skin color?
A)underlying dermis
B)epidermal cells
C)melanocytes
D)keratin-producing cells
17

The basement membrane layer of the skin separates the ____________.
A)dermis from the subcutaneous layer
B)subcutaneous layer from the epidermis
C)epidermis from the dermis
D)melanocytes from the keratin
18

Feathers and hair develop from cells originating in the _____________.
A)epidermis
B)dermis
C)subcutaneous layer
D)Both b and c are correct.
19

True or false. The dermis is remarkably similar in most animals.
A)True
B)False
20

Glands which function in communication are called ____________.
A)sweat glands
B)scent glands
C)setaceous glands
D)mammary glands
21

True or false. Antlers are structures that develop with a velvety layer of skin, which falls away, leaving a branching solid bone structure.
A)True
B)False







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