Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate. Such factors as stress, caffeine, and excitement may temporarily accelerate your heart rate, while meditating or taking slow, deep breaths may help to slow your heart rate.
Answer:
<em><u>D. Cytoskeleton</u></em>
Explanation:
It is really none of these answers. The correct answer would be a microtubule which is a component of the cytoskeleton which is in the cytoplasm.
The Cell Walls are only in plant cells so that won't work. So, A wouldn't work.
Chromosomes are the things that both your parents give you as genes. They have nothing to do with keeping the structure of the cell alright.
Cytoplasm cannot be a answer choice because, the thing is in it but, it doesn't do anything with it. So C wouldn't work either
The correct answer is microtubule however, it is a component of cytoskeleton so therefore, that is your answer.
<em><u>Reference the picture below:</u></em>
When the ride is at the top of its pole, it has all potential energy. When it is in the middle, at 34 meters, it has 50% potential energy and 50% kinetic energy. When the ride is almost at the bottom, it has kinetic energy that turns into potential energy as it reaches the end.
Answer:
I think the answer is D. it would become plasma
Zea diploperennis<span> is a wild relative of maize that is endemic to the Sierra de Manantlán Biosphere Reserve in Mexico. Because this species is a priority for conservation in the reserve, the effects on its populations of the most common types of anthropogenic disturbance – slash-and-burn, and slash without subsequent burning – were investigated in three populations for 5 years</span>
