1. Early earth had no ozone layer, which means it was most likely extremely hot.
2. Young earth had no oxygen and life needs oxygen in order to survive.
3. There where so many natural disasters happening all the time, like volcanic eruptions and constant impact with meteorites and asteroids.
-Extra one (4. Earth originally had no ocean and water. Oceans eventually formed from the water vapor released from the volcanic eruptions, but before that there was nothing.)
Hello
The form of oxygen that combines three oxygen atoms into each molecule is called<span>. Poll Everywhere.
Have a nice day</span>
The skeletal system, nervous system, and digestive system.
The skeletal system is used to move your mouth and jaw it is also used to help you chew.
The nervous system let you taste and smell the food. This is because it sends signals to your brain to allow you to taste and smell the food.
The digestive system produces saliva and allows the food to be processed into energy.
The question provided is not complete as it lacks the group of choices, however the group of choices are given as follows:
A. A contraction fails to occur because an action potential is not generated in the muscle cell.
B. A contraction fails to occur because this toxin directly prevents ion release from intracellular stores.
C. A contraction fails to occur because neurotransmitter release by the motor neuron is blocked at the neuromuscular junction.
D. A contraction fails to occur because this toxin prevents cross bridge formation and thereby directly prevents contraction.
E. C and D are both true
Answer:
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
Explanation:
A muscle contraction takes place when action potential bring to muscles by nerves, which is traveled with the help of motor neuron and imitated the muscle contraction.
Acetylcholine or Ach is a chemical messenger to bring the nerve impulses between a nerve and a muscle. If the receptor is block with applying toxin muscle will not contract as ACh will not be able to propagate the nerve impulse to the muscle so there will be no action potential.
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
The answer that best completes the statement above is 30-60 seconds. This is the rest interval needed in between sets for hypertrophy training. The purpose of this rest interval is to optimize the anabolic hormone response. So basically, this hypertrophy training aims in growing the muscles faster with great efficacy.
