How do the human nervous system and endocrine system interact in response to a stimulus?
A. The endocrine system signals the nervous system to send out
nerve impulses in response to a stimulus.
B. The nervous system signals the endocrine system to release
hormones in response to a stimulus.
O C. The nervous system responds to a stimulus, and the endocrine
system returns the body to a relaxed state.
D. The endocrine system responds to a stimulus, and the nervous
system returns the body to a relaxed state.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set