Question 1

Which term refers to a muscle that increases the angle between two bones at a joint?

Accepted Answer

A)   flexor
B)   depressor
C)   agonist
D)   extensor D

Question 2

Match each molecule with its description.
-tropomyosin

Accepted Answer

A)  molecules that form a twisted double helix that makes up most of the thin filaments
B)  neurotransmitters involved in muscle cell contraction
C)  molecules that block the crossbridge binding sites when the muscle is not contracting
D)  molecules that make up thick filaments
E)  molecules that bind to Ca2+, change their shape, and then uncover the crossbridge binding sites C

Question 3

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all.
-high contraction intensity

Accepted Answer

A)  slow
B)  fast aerobic
C)  fast anaerobic
D)  both slow and fast aerobic
E)  both fast aerobic and fast anaerobic C

Question 4

What kind of joint is the human elbow an example of?

Accepted Answer

A)   a flexible joint
B)   a fibrous joint
C)   a cartilaginous joint
D)   a synovial joint

Question 5

In skeletal muscle contraction, what binds to myosin?

Accepted Answer

A)   ATP
B)   Ca2+
C)   troponin
D)   acetylcholine

Question 6

Which term refers to joints that are usually highly moveable, and that have a fluid-filled capsule of connective tissue surrounding them?

Accepted Answer

A)   fibrous joints
B)   synovial joints
C)   flexible joints
D)   cartilaginous joints

Question 7

Which skeletons are the ribs and sternum considered to be a part of?

Accepted Answer

A)   the appendicular skeleton and the exoskeleton
B)   the axial skeleton and the appendicular skeleton
C)   the exoskeleton and axial skeleton
D)   the axial skeleton and the endoskeleton

Question 8

What is the name of the cords of connective tissues that connect skeletal muscles to bones?

Accepted Answer

A)   muscle fibres
B)   myofibrils
C)   sarcomeres
D)   tendons

Question 9

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all.
-intermediate fatigue resistance

Accepted Answer

A)  slow
B)  fast aerobic
C)  fast anaerobic
D)  both slow and fast aerobic
E)  both fast aerobic and fast anaerobic

Question 10

Match each bone type with a skeleton type. Each skeleton type may be used once, more than once, or not at all.
-vertebrae

Accepted Answer

A)  axial skeleton
B)  appendicular skeleton
C)  both the axial and the appendicular skeleton
D)  neither the axial nor the appendicular skeleton

Question 11

Which of the following is an antagonist muscle pair in humans?

Accepted Answer

A)   calf and gluteus maximus
B)   hamstring and biceps
C)   biceps and triceps
D)   deltoid and pectoral

Question 12

Which term refers to the joints that are somewhat moveable, but do NOT have a fluid-filled capsule surrounding them, and that have fibrous connective tissue covering the ends of the bones involved?

Accepted Answer

A)   synovial joints
B)   flexible joints
C)   cartilaginous joints
D)   fibrous joints

Question 13

Which term refers to a muscle that decreases the angle between two bones at a joint?

Accepted Answer

A)   antagonist
B)   flexor
C)   extensor
D)   depressor

Question 14

Match each molecule with its description.
-actin

Accepted Answer

A)  molecules that form a twisted double helix that makes up most of the thin filaments
B)  neurotransmitters involved in muscle cell contraction
C)  molecules that block the crossbridge binding sites when the muscle is not contracting
D)  molecules that make up thick filaments
E)  molecules that bind to Ca2+, change their shape, and then uncover the crossbridge binding sites

Question 15

Match each molecule with its description.
-troponin

Accepted Answer

A)  molecules that form a twisted double helix that makes up most of the thin filaments
B)  neurotransmitters involved in muscle cell contraction
C)  molecules that block the crossbridge binding sites when the muscle is not contracting
D)  molecules that make up thick filaments
E)  molecules that bind to Ca2+, change their shape, and then uncover the crossbridge binding sites

Question 16

Match each molecule with its description.
-myosin

Accepted Answer

A)  molecules that form a twisted double helix that makes up most of the thin filaments
B)  neurotransmitters involved in muscle cell contraction
C)  molecules that block the crossbridge binding sites when the muscle is not contracting
D)  molecules that make up thick filaments
E)  molecules that bind to Ca2+, change their shape, and then uncover the crossbridge binding sites

Question 17

In a skeletal muscle contraction, which of the following undergoes a conformational change when it binds to a specific ion and then uncovers the crossbridge binding site by causing another factor to be moved to the grooves in the actin double helix?

Accepted Answer

A)   ATP
B)   Ca2+
C)   acetylcholine
D)   troponin

Question 18

Which joints have bones joined by stiff fibres of connective tissue and are essentially immobile?

Accepted Answer

A)   fibrous joints
B)   flexible joints
C)   cartilaginous joints
D)   synovial joints

Question 19

How many skeletal muscles are in a typical human body?

Accepted Answer

A)   over 600
B)   about 200
C)   about 160
D)   fewer than 100

Question 20

Match each bone type with a skeleton type. Each skeleton type may be used once, more than once, or not at all.
-femur

Accepted Answer

A)  axial skeleton
B)  appendicular skeleton
C)  both the axial and the appendicular skeleton
D)  neither the axial nor the appendicular skeleton

Exam 46: Muscles, Skeletons, and Body Movements

Which term refers to a muscle that increases the angle between two bones at a joint?

Match each molecule with its description. -tropomyosin

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all. -high contraction intensity

What kind of joint is the human elbow an example of?

In skeletal muscle contraction, what binds to myosin?

Which term refers to joints that are usually highly moveable, and that have a fluid-filled capsule of connective tissue surrounding them?

Which skeletons are the ribs and sternum considered to be a part of?

What is the name of the cords of connective tissues that connect skeletal muscles to bones?

Match each characteristic with a muscle fibre type. Each muscle fibre type may be used once, more than once, or not at all. -intermediate fatigue resistance

Match each bone type with a skeleton type. Each skeleton type may be used once, more than once, or not at all. -vertebrae

Which of the following is an antagonist muscle pair in humans?

Which term refers to the joints that are somewhat moveable, but do NOT have a fluid-filled capsule surrounding them, and that have fibrous connective tissue covering the ends of the bones involved?

Which term refers to a muscle that decreases the angle between two bones at a joint?

Match each molecule with its description. -actin

Match each molecule with its description. -troponin

Match each molecule with its description. -myosin

In a skeletal muscle contraction, which of the following undergoes a conformational change when it binds to a specific ion and then uncovers the crossbridge binding site by causing another factor to be moved to the grooves in the actin double helix?

Which joints have bones joined by stiff fibres of connective tissue and are essentially immobile?

How many skeletal muscles are in a typical human body?

Match each bone type with a skeleton type. Each skeleton type may be used once, more than once, or not at all. -femur