Bio 228 Lecture - Cardiac Muscle Cells

Like skeletal muscle tissue, cardiac muscle tissue: 1. Is striated.

• TRUE

• FALSE

Like skeletal muscle tissue, cardiac muscle tissue: 2. Can be voluntarily controlled.

• TRUE

• FALSE

Like skeletal muscle tissue, cardiac muscle tissue: 3. Requires stimulation by the nervous system.

• TRUE

• FALSE

Like skeletal muscle tissue, cardiac muscle tissue: 4. Is amitotic and has a poor ability to heal.

• True

• False

Like skeletal muscle tissue, cardiac muscle tissue: 5. Contains some fibers that are fast twitch and some that are slow twitch.

• TRUE

• FALSE

PREDICT IT! Like neurons & skeletal muscle cells, autorhythmic & contractile cells have: 1. A higher concentration of Na+ inside / outside (circle one) the cell.

• A higher concentration of Na+ inside the cell.

• A higher concentration of Na+ outside the cell.

• Equal concentration of Na+ inside and outside the cell.

• A higher concentration of Na+ in the nucleus.

Tags

NGSS.HS-LS1-3

PREDICT IT! Like neurons & skeletal muscle cells, autorhythmic & contractile cells have: 2. A higher concentration of K+ inside / outside (circle one) the cell.

• A higher concentration of K+ inside the cell.

• A higher concentration of K+ outside the cell.

• Equal concentration of K+ inside and outside the cell.

• No K+ concentration difference inside and outside the cell.

Which of the following proteins embedded within the plasma membrane move ions from an area of low concentration to high concentration?

• Pumps

• Channels

• Gap junctions

• None are needed. Ions can freely move through the plasma membrane.

PREDICT IT! Like neurons & skeletal muscle cells, autorhythmic & contractile cells have: 1. A negative/ positive (circle one) resting membrane potential.

• A negative resting membrane potential.

• A positive resting membrane potential.

• A neutral resting membrane potential.

• A fluctuating resting membrane potential.

As a cell loses its resting membrane potential and approaches 0 mV, it is said to be:

• repolarizing

• hyperpolarizing

• depolarizing

• resting