Question 1

Clonus is a flapping motion caused by alternate activation of antagonistic stretch reflexes.

Accepted Answer

A) True 
 B)False

Question 2

What enzyme is needed to start the cross bridging process?

Accepted Answer

A) creatine phosphatase 
B) kinase 
C) myosin ATPase 
D) Ca2+ATPase 
A) creatine phosphatase 
B) kinase 
C) myosin ATPase 
D) Ca2+ATPase

Question 3

Formation of new sarcomeres and growth of myofibrils requires which of the following proteins?

Accepted Answer

A) titin 
B) nebulin 
C) obscurin 
D) All apply. 
A) titin 
B) nebulin 
C) obscurin 
D) All apply.

Question 4

The cerebellum directly influences motor activity.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following statements regarding cardiac muscle is true?

Accepted Answer

A) Dense bodies anchor thin filaments. 
B) Fibers lack I and A bands. 
C) Intercalated discs contain gap junctions. 
D) Fibers lack branches. 
A) Dense bodies anchor thin filaments. 
B) Fibers lack I and A bands. 
C) Intercalated discs contain gap junctions. 
D) Fibers lack branches.

Question 6

Thin filaments are composed of myosin and tropomyosin.

Accepted Answer

A) True 
 B)False

Question 7

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Accepted Answer

A) True 
 B)False

Question 8

Summation occurs in muscle cells when stimulus frequency increases to produce a greater force contraction.

Accepted Answer

A) True 
 B)False

Question 9

The pumps that actively transport calcium back into the _______ are called Ca2+ -ATPase pumps.

Accepted Answer

A) transverse tubules 
B) sarcoplasmic reticulum 
C) neuromuscular junction 
D) None apply. 
A) transverse tubules 
B) sarcoplasmic reticulum 
C) neuromuscular junction 
D) None apply.

Question 10

Degeneration of ______________ motor neurons occurs in amyotrophic lateral sclerosis.

Accepted Answer

A) upper 
B) middle 
C) lower 
D) both middle and lower 
A) upper 
B) middle 
C) lower 
D) both middle and lower

Question 11

Insertion of ______________ in the muscle cell membrane increases cellular glucose uptake.

Accepted Answer

A) GLUT1 
B) GLUT2 
C) GLUT3 
D) GLUT4 
A) GLUT1 
B) GLUT2 
C) GLUT3 
D) GLUT4

Question 12

During skeletal muscle contraction,adjacent _________ are pulled closer together as the _______ between them shorten.

Accepted Answer

A) A bands;I bands 
B) I bands;A bands 
C) Z disks;A bands 
D) Z disks;M lines 
A) A bands;I bands 
B) I bands;A bands 
C) Z disks;A bands 
D) Z disks;M lines

Question 13

In cardiac muscle,calcium ions are released from the sarcoplasmic reticulum due to direct interaction with the voltage-gated Ca2+ channels.

Accepted Answer

A) True 
 B)False

Question 14

The biceps brachii causes flexion of the elbow.The triceps brachii causes extension of the elbow,so it would be a/an

Accepted Answer

A) abductor. 
B) antagonist. 
C) agonist. 
D) levator. 
A) abductor. 
B) antagonist. 
C) agonist. 
D) levator.

Question 15

Which of the following is NOT a contributing factor to skeletal muscle fatigue?

Accepted Answer

A) increased intracellular K+ 
B) depletion of intracellular K+ 
C) accumulation of extracellular K+ 
D) accumulation of cytoplasmic PO43- 
A) increased intracellular K+ 
B) depletion of intracellular K+ 
C) accumulation of extracellular K+ 
D) accumulation of cytoplasmic PO43-

Question 16

Skeletal muscle cells are multinucleated.This is called a/an

Accepted Answer

A) myoblast. 
B) striation. 
C) syncytium. 
D) endomysium. 
A) myoblast. 
B) striation. 
C) syncytium. 
D) endomysium.

Question 17

Muscle repair is due to ____ forming myotubes that fuse to form new muscle fibers.

Accepted Answer

A) satellite cells 
B) myofibrils 
C) muscle cells 
D) All apply. 
A) satellite cells 
B) myofibrils 
C) muscle cells 
D) All apply.

Question 18

Lower motor neurons are found in the lower part of the brain.

Accepted Answer

A) True 
 B)False

Question 19

The epimysium surrounds the individual muscle cells.

Accepted Answer

A) True 
 B)False

Question 20

Muscles which move a limb away the midline of the body are termed as

Accepted Answer

A) abductor muscles. 
B) adductor muscles. 
C) extensor muscles. 
D) flexor muscles. 
A) abductor muscles. 
B) adductor muscles. 
C) extensor muscles. 
D) flexor muscles.

Clonus is a flapping motion caused by alternate activation of antagonistic stretch reflexes.

What enzyme is needed to start the cross bridging process?

Formation of new sarcomeres and growth of myofibrils requires which of the following proteins?

The cerebellum directly influences motor activity.

Which of the following statements regarding cardiac muscle is true?

Thin filaments are composed of myosin and tropomyosin.

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Summation occurs in muscle cells when stimulus frequency increases to produce a greater force contraction.

The pumps that actively transport calcium back into the _______ are called Ca²⁺ -ATPase pumps.

Degeneration of ______________ motor neurons occurs in amyotrophic lateral sclerosis.

Insertion of ______________ in the muscle cell membrane increases cellular glucose uptake.

During skeletal muscle contraction,adjacent ___ are pulled closer together as the _ between them shorten.

In cardiac muscle,calcium ions are released from the sarcoplasmic reticulum due to direct interaction with the voltage-gated Ca²⁺ channels.

The biceps brachii causes flexion of the elbow.The triceps brachii causes extension of the elbow,so it would be a/an

Which of the following is NOT a contributing factor to skeletal muscle fatigue?

Skeletal muscle cells are multinucleated.This is called a/an

Muscle repair is due to ____ forming myotubes that fuse to form new muscle fibers.

Lower motor neurons are found in the lower part of the brain.

The epimysium surrounds the individual muscle cells.

Muscles which move a limb away the midline of the body are termed as

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

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Exam 12: Muscle: Mechanisms of Contraction and Neural Control

Clonus is a flapping motion caused by alternate activation of antagonistic stretch reflexes.

What enzyme is needed to start the cross bridging process?

Formation of new sarcomeres and growth of myofibrils requires which of the following proteins?

The cerebellum directly influences motor activity.

Which of the following statements regarding cardiac muscle is true?

Thin filaments are composed of myosin and tropomyosin.

The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.

Summation occurs in muscle cells when stimulus frequency increases to produce a greater force contraction.

The pumps that actively transport calcium back into the _______ are called Ca2+ -ATPase pumps.

Degeneration of ______________ motor neurons occurs in amyotrophic lateral sclerosis.

Insertion of ______________ in the muscle cell membrane increases cellular glucose uptake.

During skeletal muscle contraction,adjacent _________ are pulled closer together as the _______ between them shorten.

In cardiac muscle,calcium ions are released from the sarcoplasmic reticulum due to direct interaction with the voltage-gated Ca2+ channels.

The biceps brachii causes flexion of the elbow.The triceps brachii causes extension of the elbow,so it would be a/an

Which of the following is NOT a contributing factor to skeletal muscle fatigue?

Skeletal muscle cells are multinucleated.This is called a/an

Muscle repair is due to ____ forming myotubes that fuse to form new muscle fibers.

Lower motor neurons are found in the lower part of the brain.

The epimysium surrounds the individual muscle cells.

Muscles which move a limb away the midline of the body are termed as

The Study of Body Function

Chemical Composition of the Body

Cell Structure and Genetic Control

Enzymes and Energy

Cell Respiration and Metabolism

Interactions Between Cells and the Extracellular Environment

The Nervous System: Neurons and Synapses

The Central Nervous System

The Autonomic Nervous System

Sensory Physiology

Endocrine Glands: Secretion and Action of Hormones

Blood,Heart and Circulation

Cardiac Output,Blood Flow,and Blood Pressure

The Immune System

Respiratory Physiology

Physiology of the Kidneys

The Digestive System

Regulation and Metabolism

Reproduction

Filters

The pumps that actively transport calcium back into the _______ are called Ca²⁺ -ATPase pumps.

During skeletal muscle contraction,adjacent ___ are pulled closer together as the _ between them shorten.

In cardiac muscle,calcium ions are released from the sarcoplasmic reticulum due to direct interaction with the voltage-gated Ca²⁺ channels.