Basic Immunology Dr. Asif Iqbal Khan Quiz

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What is the immune system capable of generating?

An enormous variety of cells and molecules capable of specifically recognizing foreign invaders but not eliminating them

A limited variety of cells and molecules capable of specifically recognizing and eliminating foreign invaders

A limited variety of cells and molecules capable of generally recognizing and eliminating foreign invaders

An enormous variety of cells and molecules capable of specifically recognizing and eliminating foreign invaders (correct)

What is immunology?

The study of immune system or immunity (correct)

The study of the physiological mechanisms which enable the body to metabolize or eliminate foreign materials without injury to the host tissue

The study of physiological mechanisms which enable the body to recognize foreign materials and neutralize them without injury to the host tissue

The study of all aspects of host defense against infection and of adverse consequences of immune responses

What is immunity?

State of susceptibility to infectious diseases

State of resistance to treatment of infectious diseases

State of protection from infectious diseases (correct)

State of vulnerability to infectious diseases

What is the natural immune system?

The defense system evolved to protect animals from invading pathogenic microorganisms and cancer (B) Signup and view all the answers

Which observation promoted deliberate attempts to induce immunity according to the history of immunology?

Individuals recovering from certain disease rarely contracted that same disease again (D) Signup and view all the answers

What is the diameter range of individual skeletal muscle fibers?

30 to 80 μm (B) Signup and view all the answers

Where are the nuclei located in skeletal muscle fibers?

Just beneath the cell membrane (sarcolemma) (A) Signup and view all the answers

What gives rise to the regular cross-striations in skeletal muscle fibers?

Particular arrangement of actin and myosin (C) Signup and view all the answers

What distinguishes skeletal muscle fibers?

Presence of multiple elongated nuclei located at fairly regular intervals just beneath the cell membrane (B) Signup and view all the answers

What are myofibrils packed with?

Contractile proteins (C) Signup and view all the answers

How are myofibrils arranged within muscle fibers?

Parallel to the sarcolemma (B) Signup and view all the answers

Which organelle is found in the sarcoplasm of a muscle fiber?

Mitochondria (D) Signup and view all the answers

What surrounds the bundles of muscle fibers known as fascicles?

Perimysium (D) Signup and view all the answers

Which type of muscle fiber uses predominantly an aerobic (oxidative) metabolism?

Type I (D) Signup and view all the answers

What distinguishes the 'fast-twitch' white muscle fibers?

Anaerobic metabolism (D) Signup and view all the answers

In normal human muscle, what percentage of fibers are type IIA?

50% (B) Signup and view all the answers

What characterizes type IIC muscle fibers?

Undifferentiated and precursors of other types (D) Signup and view all the answers

What is the function of the endomysium in muscle tissue?

Separating individual muscle fibers (B) Signup and view all the answers

Where are nerves and blood vessels usually seen in muscle tissue?

Perimysium and endomysium (A) Signup and view all the answers

What surrounds an entire muscle and forms a collagenous connective tissue sheath?

Epimysium (C) Signup and view all the answers

Which type of muscle fiber has a checkerboard distribution pattern in normal human muscle?

Type IIA (C) Signup and view all the answers