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attashe74 [19]
3 years ago
5

The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae b

efore the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.true/false
Biology
1 answer:
sashaice [31]3 years ago
8 0

Answer:

False

Explanation:

The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.

They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.

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The Andes Mountains are found along the western coast of South America. Which kind of plate boundary is responsible for this mou
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The Nazca plate is converging

Explanation:

I did the test :)

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What do restriction endonucleases do? what do restriction endonucleases do? they cut dna at specific sites, known as recognition
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What gas, found in cigarette smoke and automobile exhaust, blocks the transport of oxygen by hemoglobin in the blood?
Andre45 [30]
Hello There! ^_^

Your question: What gas found in cigarette smoke and automobile exhaust, blocks the transport of oxygen by hemoglobin in the blood..?

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Hope this helps! :D








3 0
3 years ago
Hemoglobin is produced by
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6 0
3 years ago
Ralph has type B blood and his wife Rachel has type A blood. They are very shocked to hear that their baby has type O blood, and
Cerrena [4.2K]

Answer:

1. The parents genotypes could have been BO and AO

2. wire-hair

Explanation:

There are four possible blood types which are type A, B, AB, O. blood group is the classification of blood based on the presence or the absence of inherited antigenic substances on the surface of the red blood cells. They have hereditary basis and also rely on a series of alternative genes sometimes used in solving dispute of parental heritage. With the four possible blood groups, there are six possible genotypes and these are:

Blood type               possible genotypes

Type A                         AA, AO

Type B                         BB, BO

Type AB                           AB

Type O                              OO

Thus, for parents with blood type B and A to give birth to a child with blood type O, it means their genotype could have been both BO and AO  for them to be able to produce a child with OO. a cross between these two could give rise to OO.

Question 2

Wire hair is dominant (S) to smooth (s), thus wire hair could be in the homozygous (SS) and heterozygous form (Ss) and the smooth hair can only be expressed in the homozygous recessive form (ss).

thus, in a cross between homozygous wire haired and smooth haired, we will have:

homozygous wire haired            homozygous smooth haired

P gen              SS                x               ss

F1 gen.                                Ss

phenotype:                     wire haired

8 0
3 years ago
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