Muscular System

Connective tissue that surrounds fascicles is ___________________________

• Perimysium

• Endomysium

• Epimysium

Poisons such as botulism that prevent the release of acetylcholine would ___________________________

• prevent muscle contraction

• cause sustained contraction

• result in muscle spasms.

What type of muscles are primarily voluntary, and striated?

• Skeletal

• Cardiac

• Smooth

What neurotransmitter is associated with the muscles: ____________________

• neurotransmitter

• hormone

• enzyme

• second messenger

What cell organelle provides the ATP needed for muscle activity?

• Mitochondria

• Nucleus

• Chloroplast

• Endoplasmic reticulum

Tags

NGSS.HS-LS2-5

The gap between the nerve and the muscle is called the ____________________

• synapse

• neuromuscular cleft

• axon terminal

• muscle junction

What is hypertrophy? Atrophy?

• Hypertrophy refers to the increase in the size of muscle cells. Atrophy refers to the decrease in the size of muscle cells.

• Hypertrophy refers to muscle wasting due to inactivity, while atrophy refers to an increase in muscle cell size due to exercise.

• Hypertrophy refers to the decrease in muscle cell size, and atrophy refers to the increase in muscle cell size.

Tags

NGSS.HS-LS3-2

12. Cholinesterase is an enzyme that breaks down ____________________________

• Cholinesterase is an enzyme that breaks down acetylcholine.

• Cholinesterase is an enzyme that breaks down acetylcarnitine.

• Cholinesterase is an enzyme that breaks down choline.

• Cholinesterase is an enzyme that breaks down adrenaline.

During a muscle contraction, cross-bridges form between what two structures?

• actin and myosin filaments

• tubulin and fibrillin

• actin and titin

• keratin and collagen

In a sarcomere, the I band is made of __________ and the A band is made of __________

• I band: actin filaments; A band: myosin filaments

• I band: myosin filaments; A band: actin filaments

• I band: collagen fibers; A band: elastic fibers

• I band: actin filaments; A band: actin filaments