9.1 - Muscle Organization

Question 1

Muscle tissue is

Answer 1

Excitable (has membrane potential that can be converted to AP)

Question 2

Sliding filament model

Answer 2

Getting molecules within a cell to interact, causing the cell to contract

Question 3

Three types of muscle tissue

Answer 3

Skeletal(voluntary), cardiac, smooth

Question 4

Muscle tissue responsible for

Answer 4

Movement
Stabilizing posture
Heat production

Question 5

Skeletal & cardiac are both

Answer 5

Striated

Question 6

Striation of muscle has nothing to do with voluntary/involuntary control

Answer 6

True

Question 7

Muscle fibers =

Answer 7

Cells

Question 8

Fascicles are

Answer 8

Bundle of muscle fibers

Question 9

Myofilaments

Answer 9

Contractile proteins

Question 10

Muscle fibers =

Answer 10

Cells

Question 11

Fascicles are

Answer 11

Bundles of muscle fibers

Question 12

Myofilaments

Answer 12

Contractile proteins organized into specialized organelles called myofibrils

Question 13

Tendons

Answer 13

Connection of muscle to bone. Dense regular Connective tissue (collagen) extends from covering of each cell.

Question 14

Muscle is an organ

Answer 14

True

Question 15

Neuron + muscle fiber(s) =

Answer 15

Motor unit

Question 16

Smaller motor units are

Answer 16

Triggered first, easy to stimulate

Question 17

Larger motor units

Answer 17

Require more stimulation

Question 18

Junction between neuron and muscular fiber

Answer 18

NMJ - neuromuscular junction

Question 19

At the NMJ what happens

Answer 19

Release of NT into synapse (ACh) which binds to membrane of muscle fiber (opens sodium ion channel), the AP travels along membrane causing Calcium ion release

Question 20

Muscle fibers are fused during

Answer 20

Embryonic development

Question 21

Muscle fibers are multinucleated

Answer 21

True

Question 22

Myofibrils

Answer 22

Made of Myofilaments