REM sleep is associated with . a) temporary skeletal muscle inhibition except for ocular muscles and diaphragm b) decreased vital signs, such as heart rate and blood pressure c) decreased oxygen use, especially in the cerebral cortex d) decreased activity of the brain, especially the cerebral cortex

A.-this is muscular paralysis peculiar to REM sleep. it is needed to restrict muscular movement during dreaming.

Explanation:

All the option listed except A do not take place in Rapid Eye Movements. Generally during sleep, the brain moves through 5 stages of sleep cycle.The REM is one of the stages where the eye moves rapidly in different directions.

It usually begins with the first 90 mins after falling asleep. It is the stage of  dreams,and made up of 50% of infants sleeping cycle. it also consolidate memory formation, mood, and learning.

Generally, the brain is active as one is awake during this stage, thus constant oxygen supply to sustain the brain functions at the cerebral cortex is ensured.  Therefore breathing is rapid and increased. Vital signs increased, blood pressure and heart rate increases as breathing also increases.

A. Temporary skeletal muscle inhibition except for ocular muscle and diaphragm.

Explanation:

The brain moves through five different stages during sleep and one of these stages is the rapid eye movement (REM) sleep. In this stage, several changes takes place in the body and brain. These changes includes;

1. eyes moving rapidly in various directions.

2. Fast and irregular breathing which involves increase in heart rate.

3. The body temperature experience changes.

4. Increase in blood pressure

5. Increase in oxygen consumption by the brain.

During REM sleep, the brain gives signal to the spinal cord to cease movement of the hands and legs.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.