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TiliK225 [7]
3 years ago
13

What is the function of chordae tendinae?

Health
1 answer:
il63 [147K]3 years ago
3 0

Answer:

A.hold valve shut when ventricles contract

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"chord" means this in Greek?​
tester [92]
The first comes from the word accord and refers to a harmonious combination of three or more musical notes. The second is an alteration of cord, taking its spelling from Greek chorda, "string, gut," by way of Latin. This is the mathematical chord—a line segment that joins two points on a curve
7 0
3 years ago
Prove sinA*cos2A=1/4sin4A*secA<br>​
kolezko [41]

Answer:

The prove is below

Explanation:

From trigonometric identities:

cos2A=cos(A+A)=cos^2A-sin^2A\\sin2A=sin(A+A)=2sinAcosA\\sin4A=sin(2A+2A)=2sin2Acos2A=2(2sinAcosA)(cos^2A-sin^2A)=4sinAcos^3A-4cosAsin^3A\\secA=\frac{1}{cosA}

Therefore:

\frac{1}{4}sin4AsecA = \frac{1}{4}( 4sinAcos^3A-4cosAsin^3A)\frac{1}{cosA}\\= sinAcos^3A-cosAsin^3A(\frac{1}{cosA} )\\=sinAcos^2-sin^3A\\=sinA(cos^2A-sin^2A)\\But\ cos^2A-sin^2A=cos2A\\Therefore:sinA(cos^2A-sin^2A)=sinAcos2A\\\frac{1}{4}sin^4Acos2A=sinAcos2A

4 0
3 years ago
1. A muscular system essential because it allows our bones to? A. Strengthen B. Contract C. Lengthen D. Move
QveST [7]
Your answer is b idk why they want me to put 20 characters for this

4 0
4 years ago
Read 2 more answers
How does magnetic radiation affect the human body?
Rzqust [24]
Low-frequency magnetic fields induce circulating currents within the human body. The strength of these currents depends on the intensity of the outside magnetic field. If sufficiently large, these currents could cause stimulation of nerves and muscles or affect other biological processes.
3 0
3 years ago
When was the first neurotransmitter observed
goldenfox [79]

Answer:

1921

Explanation:

Acetylcholine was the first neurotransmitter to be discovered. It was isolated in 1921 by a German biologist named Otto Loewi, who would later win the Nobel Prize for his work.

6 0
3 years ago
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