Systole is the ________ phase of the cardiac cycle. A. Contraction
B. Relaxation
C. Monitoring
D. Termination

Answers

Answer 1

Answer: B. Relaxation

Systole is the ________ phase of the cardiac cycle.
NOT:
A. Contraction
C. Monitoring
D. Termination

Answer 2

Answer:

Systole occurs between s1 and s2 and after active filling fill 100% of the ventricles (caused by the sequential contraction created from the SA node). The increased pressure in the ventricles will cause the now lower pressured atrium valves to shut causing s1. Then with all valves closed this creates what is called an Isovolumetric contraction. This occurs when the SA node contraction will travel down the AV node which travels down the septum and eventually reaches the purkinje fibers and causes a simultaneous contraction and open the semilunar valves. This entire process occurs during the systolic phase.

An easy mnemonic to remember is diastolic which is the opposite of systolic sounds like it has the word "die" in it. Dying is when we usually relax and Diastole is the relaxation phase of the cardiac cycle. Systole would therefore be the contraction phase.

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In hypertonic environments, cells that lack a cell wall can become dehydrated, causing: A) Increased turgor pressure B) Increased cell volume C) Cell lysis D) Cell shrinkage

Answers

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Most insects have small holes in the exoskeleton called _____, which open and close to regulate air flow. bronchi alveoli spiracles trachea

Answers

[] Question #7

Most insects have small holes in the exoskeleton called _____, which open and close to regulate air flow.
bronchi
alveoli
>> spiracles
trachea

the answer to your question is spiracles

Explain why the oil floats after the stirring stops?

Answers

the reason that happens because oil is less denser than water

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A scientist tries to mate the two similar-looking fruit flies Drosophila melanogaster and Drosophila simulans. He finds that they are unable to produce viable offspring. What kind of evolutionary barrier could this be? A. Chromosomal
B. Postzygotic
C. Physical

Answers

A Drosphila melanogaster and a Drosphila simulans are unable to produce viable offspring because of (B) Postzygotic evolutionary barrier. This is because the hybrid of the two cannot regularly form their genes together. When this does happen, the offspring generally does not live because the baby cannot mature enough and it usually dies before being born.

HELP!!!!15 POINTS!!!!!!

i think it's f but idk..