This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which hormone helps establish day-night cycles? A) Melatonin B) Dopamine C) Thyroxine D) ... (Read 16 times)

Jipu 123

  • Hero Member
  • *****
  • Posts: 569
on: Jul 3, 2018
Which hormone helps establish day-night cycles?
 
  A) Melatonin B) Dopamine C) Thyroxine D) Norepinephrine

Question 2

The relatively diffuse collection of phagocytic cells throughout the body is called what?
 
  A) Monocyte-macrophage system B) Reticuloendothelial system
  C) Phagocytic system D) Both A and B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

olivia_paige29

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 3, 2018
Answer to Question 1

A

Answer to Question 2

D


Jipu 123

  • Member
  • Posts: 569
Reply 2 on: Jul 3, 2018
Excellent

Liamb2179

  • Member
  • Posts: 365
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The longest a person has survived after a heart transplant is 24 years.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

The parathyroid glands. These four glands are located on the posterior side of the thyroid gland. Th The parathyroid glands. These four glands are located on the posterior side of the thyroid gland. Th
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Hormonal changes during the ovarian and uterine cycles Hormonal changes during the ovarian and uterine cycles
The voltage-gated channel cycles during an action potential The voltage-gated channel cycles during an action potential
Mechanisms of Hormone Action Mechanisms of Hormone Action
Sleepless Night Sleepless Night
Video: Hierarchical Sequencing Method - Sequence Tagged Sites

For a complete list of videos, visit our video library