What type of tissue protects bones in joints by preventing friction?

1 answer:

8 0

the bones of fibrous joints are joined by fibrous tissue, such as the sutures in the skull or the pelvis. Fibrous joints allow no movement at all. he bones of synovial joints meet in a joint capsule, such as the knee joint where the femur and tibia meet. These joints are the most common and most moveable joints in the human body

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You are getting ready to go to bed, but the last time you ate was at lunch. Which part of your brain would give you the sensatio

sleet_krkn [62]

Hello There :D

Answer: B. hypothalamus

Reason: The part of the brain which controls hunger is the Hypothalamus. The hormones produced here control temperature, thirst, hunger, sleep, mood.

I hope I helped
-Chris

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4 years ago

What is photosystem 1 and photosystem 2 and what do they do? What are the steps ?

lesantik [10]

P I and PII are proteic compounds present in the thylakoid membrane that contain about 300 chlorophyll molecules each.

First of all light with a wavelength of 690nm is absorbed by P II. The light excites an electron that leads to the photolysis of water(H2O--->2H+ +2e- + 1/2O2). The two electrons released go into the electron transport chain. The second compound in electron transport chain is plastoquinone that is reduced when it accepts electrons then oxidised when it loses them to P I. The next two compounds are cytocromes that make hydrogen protons go inside the thylakoid when they recieve the electrons.(I will mention what happens to the H+ in the second step). The next compound in the electron transport chain is a compound that contains Fe and S. The electrons finally reach the last step: Reduction of NADP+ to NADPH+H+.

In the second step is ATP synthesis. Hydrogen protons accumulate inside the thylakoid membrane. An electrochemical gradient is formed. The protons can leave the thylakoid according to this gradient through an enzyme.

When the protons flow through , it turns ADP into ATP.

To sumarize: the role of P II is O2 production through photolysis and ATP synthesis(indirectly) The role of P I is NADPH+H+ synthesis.

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Which type of surface bedrock is most commonly found in the Utica, New York area?

Dmitrij [34]

Answer:

Shale, Limestone, Sandstone, Dolostone

Explanation:

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sashaice [31]

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The hormone that does the opposite of calcitonin is

stepladder [879]

parathyroid hormone

this isn't needed <20 word thing

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