The cerebellum:
a. maintains alertness and consciousness.
b. aids in balance and control of body movement.
c. plays a vital role in memory and in images of space that help us find our way.
d. is a large bundle of fibers connecting the two cerebral hemispheres.

The correct answer is b.

The cerebellum: aids in balance and control of body movement.

Explanation:

Balance, voluntary muscle movements and coordination are the responsibility of the cerebellum, it is a structure of the central nervous system, which is located at the back and bottom of the skull. The main function of the cerebellum is to integrate motor and sensory pathways. In short, it receives information and orders from the cerebral cortex and connects them with the locomotor system, helping our movements to be uniform and coordinated.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.