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Multiple Choice Quiz
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1

Given what you know about the hierarchy of chemical organization, answer the following question. If Los Angeles was a molecule, Orange County was a cell, and California was a tissue, what would the United States be?
A)a sister cell
B)an organ system
C)an organ
D)an organism
2

Which organ system is primarily responsible for coordinating, regulating, and integrating the various activities of the body?
A)nervous
B)endocrine
C)muscular
D)respiratory
3

Which of the following statements best describes endocrine glands?
A)Endocrine glands are ductless glands that secrete hormones.
B)Endocrine glands are ductless glands that secrete sweat, saliva, and digestive enzymes.
C)Endocrine glands secrete hormones through a duct.
D)Endocrine glands secrete sweat, saliva, and digestive enzymes through a duct.
4

Which of the following is not considered a connective tissue?
A)blood
B)muscle
C)adipose tissue
D)cartilage
5

Which of the following statements about nerve tissue is false?
A)Neurons transmit sensory information to the brain.
B)Both neurons and neuroglia are present in the CNS and PNS.
C)Neurons conduct electrical impulses.
D)All types of cells in nerve tissue conduct electrical impulses.
6

Exoskeletons provide excellent protection to internal organs. However, animals that utilize exoskeletons are usually relatively small. Why?
A)These animals are only able to produce a limited amount of chitin.
B)Exoskeletons are not living tissue, and therefore they cannot grow.
C)A large exoskeleton would be too heavy to move.
D)During molting, these animals are especially vulnerable to predators and therefore do no usually live long enough to grow bigger.
7

Which of the following statements best describes the sliding filament mechanism of muscle contraction?
A)Actin and myosin filaments do not shorten, but rather, slide past each other.
B)Actin and myosin filaments shorten and slide past each other.
C)As they slide past each other, actin filaments shorten, while myosin filaments do not shorten.
D)As they slide past each other, myosin filaments shorten, while actin filaments do not shorten.
8

What is the role of Ca++ in muscle contraction?
A)It binds to tropomyosin, enabling troponin to move and reveal binding sites for cross-bridges.
B)It binds to troponin, enabling tropomyosin to move and reveal binding sites for cross-bridges.
C)It binds to tropomyosin, enabling troponin to release ATP.
D)It binds to troponin, enabling tropomyosin to release ATP.
9

Motor neurons stimulate muscle contraction via the release of
A)Ca++.
B)ATP.
C)acetylcholine.
D)hormones.
10

Which of the following statements about muscle metabolism is false?
A)Skeletal muscles at rest obtain most of their energy from muscle glycogen and blood glucose.
B)ATP can be quickly obtained by combining ADP with phosphate derived from creatine phosphate.
C)Exercise intensity is related to the maximum rate of oxygen consumption.
D)ATP is required for the pumping of the Ca++ back into the sarcoplasmic reticulum.







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