Which of the following statements is true? sweating is an example of postive feedback. shivering is an example of negative feedback the nervous system is responsible for sensing changes in the environment. all of the above

all of the above

Explanation:

All the statements are true that is Sweating is an example of positive feedback because when you sweat your body becomes hot and your inner body becomes cool.  Shivering is an example of negative feedback because shivering occurs when there is cold in the body and can lead to sickness. The nervous system is responsible for sensing changes in the environment because it is responsible for sensing what's going on in our body.

The nervous system is responsible for sensing changes in the environment.

Explanation:

Sweating is a example of negative feedback and shivering is an example of positive feedback.

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

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.