Chapter 32 - Structural Support And Movement

Question 1

A hydrostatic skeleton consists of ___________.

a. a fluid in an enclosed space
b. hardened plates at the surface of a body
c. internal hard parts
d. none of the above

Answer 1

a. a fluid in an enclosed space

Question 2

Bones are ___________.

a. mineral reservoirs
b. skeletal muscle’s partners
c. smooth
d. all of the above

Answer 2

b. skeletal

Question 3

A ligament connects __________.

a. bones at a joint
b. a muscle to a bone
c. a muscle to a tendon
d. a muscle to a bone

Answer 3

a. bones to a joint

Question 4

Bone break down is stimulated by ____________.

a. parathyroid hormone
b. estrogen
c. vitamin D
d. cortisol

Answer 4

a. parathyroid hormone

Question 5

Action of the ________ muscle is opposed by action of the triceps muscle.

Answer 5

biceps

Question 6

Skeletal muscle can only _______ bones.

a. pull on
b. push against
c. exert force on

Answer 6

a. pull on

Question 7

In sarcomeres, phosphate-group transfers from ATP activate __________.

a. actin
b. myosin
c. both
d. neither

Answer 7

b. myosin

Question 8

A sarcomere shortens when ________.

a. thick filaments shorten
b. thin filaments shorten
c. both thick and thin filaments shorten
d. none of the above

Answer 8

d. none of the above

Question 9

ATP for muscle contraction can be formed by __________.

a. aerobic respiration
b. lactate fermentation
c. creatine phosphate breakdown
d. all of the above

Answer 9

d. all of the above

Question 10

Red muscle fibers get their color from ____________.

a. ATP
b. myosin
c. myoglobin
d. collagen

Answer 10

c. myoglobin

Question 11

A motor unit is __________.

a. a muscle and the bone it moves
b. two muscles that work in opposition
c. the amount a muscle shortens during contraction
d. a motor neuron and the muscle fibers it controls

Answer 11

d. a motor neuron and the muscle fibers it controls

Question 12

True or false? Aerobic exercise increases the number of muscle fibers and a muscle.

Answer 12

False

Question 13

Muscular dystrophy __________.

a. is a genetic disorder
b. is a type of food poisoning
c. can be prevented with a vaccine
d. is caused by a virus
e. both c and d

Answer 13

e. both c and d

Question 14

Match the terms with their definitions.

\_\_\_ tendon
\_\_\_ muscle twitch
\_\_\_ myoglobin 
\_\_\_ joint
\_\_\_ myosin
\_\_\_ red marrow 
\_\_\_ metacarpals 
\_\_\_ ligament
\_\_\_ sarcoplasmic reticulum

a. stores and releases calcium
b. all in the hands
c. blood cell production
d. holds bones in place at a joint
e. area of contact between bones
f. motor unit response
g. reversibly binds oxygen
h. connects muscle to bone
i. binds ATP and converts it to ADP and phosphate

Answer 14

Match the terms with their definitions.

(h) tendon
(f) muscle twitch
(g) myoglobin
(e) joint
(i) myosin
(c) red marrow
(b) metacarpals
(d) ligament
(a) sarcoplasmic reticulum

a. stores and releases calcium
b. all in the hands
c. blood cell production
d. holds bones in place at a joint
e. area of contact between bones
f. motor unit response
g. reversibly binds oxygen
h. connects muscle to bone
i. binds ATP and converts it to ADP and phosphate