1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Karo-lina-s [1.5K]
3 years ago
10

Early sleep research began when researchers noted that physiological changes create _______ that can be measured during sleep.

Biology
1 answer:
dalvyx [7]3 years ago
3 0
Hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.
You might be interested in
Please help, is this answer choice correct?
Otrada [13]
Yes that is the correct answer choice
5 0
3 years ago
Would an amphibian that lacks lungs and breathes entirely through its skin likely be larger or smaller than an amphibian that ha
den301095 [7]
<span>An amphibian that lacks lungs and breathes entirely through its skin would have to be smaller than an amphibian with lungs so that the small oxygen intake correlates with the small surface area of the amphibian. This would then allow it to breath efficiently.</span>
8 0
3 years ago
The __________________ pulp of the spleen contains lymphocytes and serves to fight pathogens, whereas the __________________ pul
STatiana [176]

Answer:

The given blanks can be filled with white pulp and red pulp.

Explanation:

In the lymphatic system, the spleen is considered as the largest organ. It is situated in the upper left part of the abdominal cavity, the main function of the spleen is to filter blood containing the destructed cells, pathogens like viruses and bacteria, and cellular debris.  

The spleen generates and develops the mature immune cells, which possess the tendency of finding and eliminating the pathogens. The white pulp of the spleen comprises the immune cells, that is, the B and T lymphocytes, which help in fighting against the pathogens.  

On the other hand, the red pulp of the spleen comprises connective tissue called the cords of Billroth, and various splenic sinusoids, which are filled with blood, providing it a red appearance. Its main function is to filter the blood containing microbes, pathogens, and worn-out or the defective RBCs.  

6 0
3 years ago
List the level of organization within a multicellular organism.
saw5 [17]
Level 1 - Cells.
Level 2 - Tissues.
Level 3 - Organs.
Level 4 - Organ Systems.
Level 5 - Organisms.
5 0
3 years ago
Clearly outline what differentiates Gram +ve bacteria from Gram -ve bacteria?​
Mars2501 [29]

Answer:

Gram positive bacteria have cell walls composed of thick layers of peptidoglycan. Gram positive cells stain purple when subjected to a Gram stain procedure. Gram negative bacteria have cell walls with a thin layer of peptidoglycan.

4 0
2 years ago
Other questions:
  • Match the term to the correct system.
    5·1 answer
  • You prescribe therapy for three patients in your clinic. which will probably have the most successful treatment?
    10·1 answer
  • Create a food chain with the following animals:
    13·1 answer
  • Besides a veterinary surgeon, what other veterinary specialist is most directly involved in animal surgery?
    7·1 answer
  • The Red Sea is widening at a rate of 1.25 centimeters per year. How many years will it take to widen another 812.5 centimeters?
    6·2 answers
  • Help from the image? Thanks
    6·2 answers
  • The term for the role a organisms has in the community
    10·1 answer
  • In the investigation of oxygen dynamics in E. chlorotica cultures,
    12·1 answer
  • I NEED ANSWER PLSSSS!!!
    6·2 answers
  • 2.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!