Practice Test 6

Question 1

Which of the following muscle components is in order from LARGEST to SMALLEST?

Answer 1

muscle belly / fascicles / muscle fibers / myofibrils

Question 2

Which muscle type is tubular shaped?

Answer 2

skeletal and cardiac

Question 3

What is the function of a t-tubule?

Answer 3

transmit electrical signal into cell

Question 4

Which of the statements below describe myosin?

1) stationary (don’t move) during contraction

2) thick filaments

3) slide during contraction

4) thin filaments

Answer 4

1 and 2

Question 5

Acetylcholine relays the electrical signal between _____________ and _____________

Answer 5

the motor neuron / the muscle fiber (cell)

Question 6

Calcium binds to ________ on the _______ filament

Answer 6

troponin
actin

Question 7

The preferred source of energy used by the muscles is _____ found in the _______

Answer 7

glycogen
muscles

Question 8

__________________ muscle twitch fibers prefer aerobic pathways for energy, and as a result have ____________ mitochondria.

Answer 8

slow more

Question 9

If the muscularis layer of the GI tract was missing, we would not be able to do _________________.

Answer 9

peristalsis

Question 10

In pregnancy, it’s common for the fetus to press on the stomach, which pushes the gastric juices through the ____________ and into the esophagus, causing heartburn.

Answer 10

Esophageal sphincter

Question 11

In the stomach, the gastric juices contain _________, which kills bacteria, and ____________, the enzyme that breaks down proteins.

Answer 11

Hydrochloric acid / pepsin

Question 12

Where are villi and microvilli found?

Answer 12

small intestine

Question 13

Which organ detoxifies the blood, breaks down hemoglobin, and stores glycogen?

Answer 13

liver

Question 14

The gallbladder ___________, which functions to ___________

Answer 14

stores bile
emulsify fats