Smooth and skeletal muscle

Question 1

function of muscles in the body

Answer 1

contractions and relaxation in order to create movement

Question 2

skeletal muscle function

Answer 2

contraction/relaxations (shortening/lengthening) to create movement or stabilise body position
limb movement, speech, chewing, heat

Question 3

smooth muscle function

Answer 3

create movement within the body

air, blood, fluid, food/bowel movement

Question 4

What types of muscles are striated?

Answer 4

Skeletal and heart

Question 5

Is skeletal muscle voluntary or involuntary?

Answer 5

Voluntary

Question 6

Is smooth muscle voluntary or involuntary?

Answer 6

Involuntary

Question 7

Is cardiac muscle voluntary or involuntary?

Answer 7

Involuntary

Question 8

What do ions and ionic currents establish?

Answer 8

Resting plasma membrane potential- excitable cells

Question 9

What is an action potential?

Answer 9

Brief change in resting membrane potential

Question 10

What is the function of myofilament reconfiguration and sarcomere shortening?

Answer 10

Contraction and relaxation in order to create movement

Question 11

What is skeletal muscle contraction/relaxation for?

Answer 11

Create movement or stabilise body position- limb movement, speech, chewing, heat

Question 12

What is smooth muscle contraction/relaxation for?

Answer 12

Create movement within the body- air, blood, fluid, food/bowel movement

Question 13

What is the function of muscles?

Answer 13

To contract and relax in order to create movement

Question 14

What makes muscles contract?

Answer 14

Excitation-Contraction Coupling

Question 15

Where are myofilaments?

Answer 15

Inside the sarcomeres

Question 16

How does acetylcholine activate create movement in skeletal muscle?

Answer 16

Ach-ach stimulate action potential in muscle fibre

Question 17

How do smooth muscle move?

Answer 17

Neurotransmitters from neuron varicosities diffuse into cells

Question 18

What causes an action potential?

Answer 18

Movement of ions across plasma membrane

Question 19

What channels are opened at action potential peak?

Answer 19

Calcium

Question 20

What does Ca2+ trigger?

Answer 20

Myofilament contraction

Question 21

How Ca 2+ removed from myofilaments

Answer 21

Via Ca2+ pump and removed from the cell by plasma membrane

Question 22

What happens when Ca2+ leaves myofilament?

Answer 22

Myofilament relax

Question 23

What is required for myofilament contractiom?

Answer 23

Ca2+ and ATP