Answer:
D. Organs and muscles require more blood under stress.
Explanation:
Because muscular contractions can have a protracted metabolic expenditure because it has to be adjusted to the demands of the contracting muscles.
Answer: Refractory period of the cardiac action potential
Explanation:
Unlike the skeletal muscle which can be reactivated before it reaches a contraction, cardiac muscle must wait before it is almost completely relaxed to be activated again (because of its long refractory period), so one cannot make an increase in strength of contraction with a high frequency of stimulations.
A. Because the call isn’t urgent and he politely acknowledged the call, but asked if he can call back later since it isn’t urgent
Answer: False
Explanation: People can react in different ways when it comes to stress. Some can control and manage it better while others are probably struggling more with managing it.
Answer:
Estoy respirando aire, no mucho
