Muscular System

Question 0

What is the nucleation of skeletal muscle?

Answer 0

Multi-nucleated

Question 1

What is the striation of skeletal muscle?

Answer 1

Striated

Question 2

excitability (n.)

Answer 2

ability to respond to stimulation

Question 3

What are the four characteristics of muscle?

Answer 3

Excitability, contractility, extensibility, and elasticity

Question 4

contractility (n.)

Answer 4

ability to shorten forcefully

Question 5

extensibility (n.)

Answer 5

ability to stretch and still contract

Question 6

elasticity (n.)

Answer 6

ability to resume resting length after stretching

Question 7

What is the striation of cardiac muscle?

Answer 7

Striated

Question 8

What is the nucleation of cardiac muscle?

Answer 8

Uni-nucleated

Question 9

Define motor unit.

Answer 9

A motor neuron and all of the muscle fibers it innervates

Question 10

What type of receptor is found in high density at the motor end plate?

Answer 10

Nicotinic

Question 11

What performs substrate level phosphorylation of ADP in skeletal muscle fibers?

Answer 11

Creatine phosphate

Question 12

What is the process that regulates tension at the muscular level?

Answer 12

Motor unit recruitment

Question 13

What type of muscle fiber is recruited first in skeletal muscle contraction?

Answer 13

Slow-oxidative

Question 14

What is the process that regulates tension in a single muscle fiber?

Answer 14

Summation

Question 15

What are the three types of muscle fibers?

Answer 15

Fast-glycolytic, slow-oxidative, and fast-oxidative

Question 16

What type of muscle fiber is recruited first?

Answer 16

Slow-oxidative

Question 17

What type of muscle fiber is recruited second?

Answer 17

Fast-oxidative

Question 18

What type of muscle fiber is recruited last?

Answer 18

Fast-glycolytic

Question 19

What causes fast-glycolytic fibers to be recruited?

Answer 19

When intensity of contraction exceeds ~40% of maximum tension the muscle can produce