Question 1

What are the correct steps of muscle contraction starting with ACh? 
a.ACh diffuses across the synaptic cleft.
B.The sarcolemma generates an impulse that moves down the T tubules into
The sarcoplasmic reticulum.
C.ACh binds to receptors in the sarcolemma.
D.The sarcomere contraction produces a myofibril contraction.
E.Calcium is released causing the sarcomere contraction.

Accepted Answer

A)  a - c - b - e - d
B)  a - b - c -e - d
C)  d - a - b - e - c
D)  c - e - d - a - bE) A) and B)
F) A) and D)

Question 2

Identify the labeled structures on the human skeleton in the picture.  A: ________
B: ________
C: ________
D: ________
E: ________
F: ________
G: ________
H: ________
I: ________
J: ________
K: ________
L: ________
M: ________
N: ________
O: ________
P: ________
Q: ________
R: ________
S: ________

Accepted Answer

A: frontal bone B: zygomatic bone C: max...

Question 3

Which of the following is NOT an advantage of having an endoskeleton?

Accepted Answer

A)  The skeleton grows with the animal.
B)  Endoskeletons can support the weight of a large animal.
C)  Endoskeleton provides protection to the internal organs.
D)  Endoskeletons allow for more flexibility.
E)  Endoskeletons provide protection for the outermost tissue layer of the organism.F) A) and D)
G) A) and C)

Question 4

Damage to the matrix of a bone can result in which of the following complications?

Accepted Answer

A)  There will be a decrease in available calcium phosphate which could result in decreased concentrations of calcium and phosphate ions in the blood.
B)  There will be a decrease in potassium resulting in a decrease in bone strength.
C)  There will be a decrease in the production of white blood cells.
D)  The attachment point for muscles will not be as strong resulting in more injuries.
E)  None of these are complications associated with damage to the matrix of the bone.F) A) and E)
G) A) and C)

Question 5

________ provides the energy for muscle contraction.

Accepted Answer

A)  ATP
B)  ADP
C)  Creatine phosphate
D)  Lactate
E)  GlycogenF) None of the above
G) A) and D)

Question 6

Which of the following statements about the nature of bone is true?

Accepted Answer

A)  Bone is active,growing tissue with an extensive blood supply.
B)  Bone is similar to cartilage,nearly inert,and with little blood supply.
C)  Bone is active and living when formed by osteoblast but dies after it hardens.
D)  Bone is nonliving calcium deposits and removing bone is a bloodless operation.
E)  The outer compact bone is nonliving calcium,but the bone marrow is active living tissue.F) A) and B)
G) All of the above

Question 7

________ are bone-absorbing cells and ________ are bone-forming cells.

Accepted Answer

A)  Menisci; osteoclasts
B)  Chondrocytes; lymphocytes
C)  Osteoclasts; osteoblasts
D)  Eosinophils; red blood cells
E)  Osteocytes; osteonsF) B) and E)
G) All of the above

Question 8

Which of the following functions is NOT a function of the human skeletal system?

Accepted Answer

A)  protects internal organs
B)  acts as a storage site for calcium and phosphorus ions
C)  acts as the site of blood cell production in adults
D)  acts as a structure against which muscles can contract
E)  provides the ATP for muscles to use in contractionF) B) and D)
G) B) and E)

Question 9

Which of the following statements about the vertebrae is NOT true?

Accepted Answer

A)  Twenty-six vertebrae make up the vertebral column.
B)  The vertebrae form a dorsal backbone.
C)  The vertebrae help form 4 curvatures of the spine.
D)  The vertebrae are separated by intervertebral disks.
E)  The vertebrae protect the spinal cord.F) A) and B)
G) B) and C)

Question 10

Which of the following hormones stimulate osteoblasts to form bone?

Accepted Answer

A)  erythropoietin
B)  parathyroid hormone
C)  growth hormone
D)  sex hormones
E)  Both growth and sex hormonesF) B) and E)
G) B) and D)

Question 11

Which of the following statements about the muscular system is NOT true?

Accepted Answer

A)  The human muscular system contains three kinds of muscle tissue.
B)  Muscles work in antagonistic pairs across a joint.
C)  Muscles are attached to bones by tendons.
D)  Muscles can move a bone by pushing or pulling it as they contract.
E)  Tetanus and tone are features of normal muscle tissue.F) A) and E)
G) A) and B)

Question 12

The system of flexing and extending muscles makes movement of appendages easy to understand.But how are some actions possible (sticking out your tongue,beating of your heart) when these structures have no bone structure with opposing flexors and extensors in them?

Accepted Answer

A)  One set of muscle cells must therefore be able to both contract and expand.
B)  These structures must be empty chambers,and fluids forced into them expand them.
C)  Muscle cells running diagonally or crosswise amidst the longitudinal muscles must contract and force the long relaxed muscle cells to elongate.
D)  This cannot be explained at present.E) A) and D)
F) All of the above

Question 13

What molecule is used to anaerobically regenerate ATP?

Accepted Answer

A)  ADP
B)  glucose
C)  lactate
D)  creatine phosphate
E)  tropomyosinF) B) and C)
G) A) and D)

Question 14

Which of the following groups of organisms will all possess hydrostatic skeletons?

Accepted Answer

A)  planaria,hydras and earthworms
B)  planaria,hyrdas,crayfish
C)  earthworms,crayfish and sea stars
D)  butterflies,cats and clams
E)  bluegill,lobster and planariaF) All of the above
G) A) and D)

Question 15

If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?

Accepted Answer

A)  Tropomyosin will not be pulled away from the myosin binding sites.
B)  Myosin heads will not bind to the actin filament.
C)  The power stroke will not be produced preventing the actin filament from moving.
D)  All of these are complications resulting from a lack of calcium.E) B) and C)
F) B) and D)

Question 16

Which of the following organisms lack a hydrostatic skeleton?

Accepted Answer

A)  cicada
B)  planarian
C)  hydra
D)  earthworms
E)  roundwormsF) B) and E)
G) A) and C)

Question 17

Actin and myosin filaments are both present in the dense region called the

Accepted Answer

A)  A band.
B)  Z line.
C)  H zone.
D)  I band.
E)  M band.F) B) and E)
G) D) and E)

Question 18

Which of the following statements about the development of bone in humans is NOT true?

Accepted Answer

A)  Bone breakdown and replacement occur throughout life.
B)  A primary ossification center forms in the middle of a long bone.
C)  A secondary ossification center forms at the end of a long bone.
D)  Bones may form within a cartilage model or within a membrane matrix.
E)  A cartilaginous disk remains between the primary and secondary ossification centers until old age.F) A) and E)
G) A) and C)

Question 19

Identify the labeled muscles in the picture.

Accepted Answer

A: frontalis B: orbicularis oculi C: zyg...

Question 20

Which of the following associations of term and description is NOT correct?

Accepted Answer

A)  actin - thin filament
B)  myosin - thick filament
C)  sarcomere - the entire muscle cell or muscle fiber
D)  sarcolemma - extensive plasma membraneE) All of the above
F) A) and B)

Exam 39: Locomotion and Support Systems

Which of the following groups of organisms will all possess hydrostatic skeletons?

Correct Answer
verified

Correct Answer
verified

What molecule is used to anaerobically regenerate ATP?

Correct Answer
verified

Which of the following statements about the development of bone in humans is NOT true?

Correct Answer
verified

Which of the following statements about the nature of bone is true?

Correct Answer
verified

are bone-absorbing cells and are bone-forming cells.

Correct Answer
verified

Which of the following is NOT an advantage of having an endoskeleton?

Correct Answer
verified

If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?

Correct Answer
verified

Which of the following statements about the vertebrae is NOT true?

Correct Answer
verified

Which of the following organisms lack a hydrostatic skeleton?

Correct Answer
verified

Which of the following statements about the muscular system is NOT true?

Correct Answer
verified

Identify the labeled muscles in the picture.

Correct Answer
verified
A: frontalis B: orbicularis oculi C: zyg...
View Answer

Damage to the matrix of a bone can result in which of the following complications?

Correct Answer
verified

The system of flexing and extending muscles makes movement of appendages easy to understand.But how are some actions possible (sticking out your tongue,beating of your heart) when these structures have no bone structure with opposing flexors and extensors in them?

Correct Answer
verified

Actin and myosin filaments are both present in the dense region called the

Correct Answer
verified

Which of the following hormones stimulate osteoblasts to form bone?

Correct Answer
verified

Which of the following functions is NOT a function of the human skeletal system?

Correct Answer
verified

Which of the following associations of term and description is NOT correct?

Correct Answer
verified

________ provides the energy for muscle contraction.

Correct Answer
verified

Identify the labeled structures on the human skeleton in the picture. A: B: C: D: E: F: G: H: I: J: K: L: M: N: O: P: Q: R: S:

Correct Answer
verified
A: frontal bone B: zygomatic bone C: max...
View Answer

Exam 39: Locomotion and Support Systems

Which of the following groups of organisms will all possess hydrostatic skeletons?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What molecule is used to anaerobically regenerate ATP?

Correct AnswerverifiedShow Answer

Which of the following statements about the development of bone in humans is NOT true?

Correct AnswerverifiedShow Answer

Which of the following statements about the nature of bone is true?

Correct AnswerverifiedShow Answer

________ are bone-absorbing cells and ________ are bone-forming cells.

Correct AnswerverifiedShow Answer

Which of the following is NOT an advantage of having an endoskeleton?

Correct AnswerverifiedShow Answer

If calcium is not present in the muscle cell what complications can occur in regards to muscle contraction?

Correct AnswerverifiedShow Answer

Which of the following statements about the vertebrae is NOT true?

Correct AnswerverifiedShow Answer

Which of the following organisms lack a hydrostatic skeleton?

Correct AnswerverifiedShow Answer

Which of the following statements about the muscular system is NOT true?

Correct AnswerverifiedShow Answer

Identify the labeled muscles in the picture.

Correct AnswerverifiedA: frontalis B: orbicularis oculi C: zyg...View AnswerShow Answer

Damage to the matrix of a bone can result in which of the following complications?

Correct AnswerverifiedShow Answer

The system of flexing and extending muscles makes movement of appendages easy to understand.But how are some actions possible (sticking out your tongue,beating of your heart) when these structures have no bone structure with opposing flexors and extensors in them?

Correct AnswerverifiedShow Answer

Actin and myosin filaments are both present in the dense region called the

Correct AnswerverifiedShow Answer

Which of the following hormones stimulate osteoblasts to form bone?

Correct AnswerverifiedShow Answer

Which of the following functions is NOT a function of the human skeletal system?

Correct AnswerverifiedShow Answer

Which of the following associations of term and description is NOT correct?

Correct AnswerverifiedShow Answer

________ provides the energy for muscle contraction.

Correct AnswerverifiedShow Answer

Identify the labeled structures on the human skeleton in the picture. A: ________ B: ________ C: ________ D: ________ E: ________ F: ________ G: ________ H: ________ I: ________ J: ________ K: ________ L: ________ M: ________ N: ________ O: ________ P: ________ Q: ________ R: ________ S: ________

Correct AnswerverifiedA: frontal bone B: zygomatic bone C: max...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

are bone-absorbing cells and are bone-forming cells.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A: frontalis B: orbicularis oculi C: zyg...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Identify the labeled structures on the human skeleton in the picture. A: B: C: D: E: F: G: H: I: J: K: L: M: N: O: P: Q: R: S:

Correct Answer
verified
A: frontal bone B: zygomatic bone C: max...
View Answer