test 2

Question 1

What name is given to unspecialized bone cells that undergo cell division?

Answer 1

osteogenic cells

Question 2

____ are immovable joints, for example, fibrous joints of the skull

Answer 2

Synarthroses

Question 3

According to the sliding filament model, binding sites on actin open when

Answer 3

calcium levels rise

Question 4

Muscle that has a striped appearance is described as being___

Answer 4

striated

Question 5

Arrange the following events of endochondral ossification in the proper sequence:

(1) Cartilage matrix is calcified and chondrocytes die.
(2) Chondrocyte hypertrophy.
(3) Cartilage model is formed.
(4) Osteoblasts deposit bone on the surface of the calcified cartilage of the primary ossification center.
(5) Blood vessels from the periosteum invade calcified cartilage bringing in osteoblasts and osteoclasts.

Answer 5

3,2,1,5,4

Question 6

The covering of the outer surface of the bone is the?

Answer 6

periosteum

Question 7

During muscle contraction, the cross-bridge detaches when__?

Answer 7

The myosin head binds to an ATP molecule

Question 8

Which of the following is composed of myosin molecules?

Answer 8

Thick myofilaments

Question 9

A ___ muscle typically has fascicles on both sides of the tendon

Answer 9

bipennate

Question 10

Spongy bone tissue contain

Answer 10

interconnecting plates called trabeculae

Question 10

Spongy bone tissue contains

Answer 10

interconnecting plates called trabeculae

Question 11

_____ is the foot movement at the ankle when the heel is lifted off the ground

Answer 11

Plantarflexion

Question 12

The outside of the resting plasma membrane is ____ relative to the inside of the resting plasma membrane

Answer 12

positively charged

Question 13

Movement at the shoulder joint that moves the upper limb laterally away from the body is called____

Answer 13

abduction

Question 14

The model that describes the contraction of the muscle is called the____

Answer 14

sliding filament model

Question 15

Which of the following is TRUE regarding a pivot joint?

I.Uniaxial joint
II. Biaxial joint
III.Allows rotational movement
IV.Allows inversion / eversion
V. Allows medial / lateral rotation

Answer 15

1 and 3 are true

Question 16

Which method during embryonic development is responsible for the formation of most bones

Answer 16

endochondral offifaction

Question 17

The primary function of osteoblast

Answer 17

lay down bone matrix

Question 18

_____ is the posterior motion of the scapula or mandible

Answer 18

retraction

Question 19

Which type of bone cell has processes that lie in canaliculi

Answer 19

osteocyte

Question 20

Which of the following statements about muscle tissue is true?
a.There is a small amount of smooth muscle in the heart
b.Cardiac muscle cells have multiple nuclei
c.Smooth muscle cells are long and cylindrical
d.Smooth muscle is found in the walls of hollow organs

Answer 20

Smooth muscle is found in the walls of hollow organs

Question 21

____ refers to a muscle with the opposite action of the prime mover

Answer 21

antagonist

Question 22

The sites where a chemical substance is transmitted from the presynaptic terminal of an axon to the postsynaptic membrane of a muscle fiber are called ________________________

Answer 22

neruomuscular junctions

Question 23

The _____ fracture which only one side of the bone is broken

Answer 23

greenstick

Question 24

Which cell type is responsible for breaking down bone matrix?

Answer 24

osteoclast

Question 25

In relaxed muscle, the myosin-binding site on actin is blocked by____

Answer 25

tropomyosin

Question 26

Which of the following is FALSE about Calcium Homeostasis:
a.When hypercalcaemia occurs the thyroid gland releases calcitonin
b.Calcium levels in the blood are normally 10mg / dL
c.Hypocalcaemia is defined as abnormally low levels of calcium
d.When hypocalcaemia occurs osteoblasts release calcium from bone

Answer 26

When hypocalcaemia occurs osteoblast release calcium from bone