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
vova2212 [387]
3 years ago
9

"Normal blood pressure is 120/80. What is the top number called and what is happening in the heart?"

Biology
1 answer:
STALIN [3.7K]3 years ago
8 0

A. systolic pressure, ejection of blood from the heart B. diastolic pressure, ejection of blood from the heart C. systolic pressure, ventricles are relaxing D. diastolic pressure, ventricles are relaxing E. diastolic pressure, atria are contracting, ventricles are relaxing

Answer:

A. systolic pressure, ejection of blood from the heart

Explanation:

Systolic pressure represents the highest pressure of the blood in the arteries. It is attained during the phase of ventricular systole. During this phase, the ventricles contract (systole) resulting in a build-up of the blood pressure. This makes the tricuspid and mitral valves close. As the blood pressure in the ventricles exceeds that in the arteries, semilunar valves are opened and blood flows into the aorta and pulmonary artery. The flow of the blood increases the pressure in the arteries.

You might be interested in
What are the reactants in cellular respiration? what are the products?
Gwar [14]
Cellular respiration is the process of releasing energy from the food that one had taken. The reactants of the cellular respiration were both oxygen and glucose. The main product of this process would be ATP (adenosine phosphate) but could also be H2O and CO2. 
3 0
4 years ago
Read 2 more answers
Some animals generate two germ layers during gastrulation. They are called diploblasts. Other animals generate three germ layers
vova2212 [387]

Diploblastic blastopore - gastrovascular cavity

Protostome blastopore - mouth

Deuterostome blastopore - anus

Explanation:

Blastopores are structural indentations formed on the embryo during the gastrulation stage and this develops into mouth or anus depending upon the type of the embryo.

Diplolbastic (cnidarians) blastopores develop into the gastrovascular cavity in organisms like hydra

Triploblasts with three embryonic germ layers includes acoelomates, eucoelomates, and pseudocoelomates and the blastopores transform accordingly.

The blastopores of the triploblastic eucoelomates like the protosomes (mollusks, arthropods, annelids) transforms to the mouth, denoting ‘mouth first’; while that of the deuterostomes (chordates) transform to anus, denoting ‘mouth second’.

7 0
3 years ago
A school ififish is?
Art [367]

Answer:

????????

Explanation:

?????????????

3 0
3 years ago
Read 2 more answers
Which of these are reptiles? Select all that apply.
mr_godi [17]

Answer:

lizards, snakes, turtles, tortoises, crocodiles, alligators and dinosaurs

Explanation:

Reptiles are air-breathing vertebrates covered in special skin made up of scales, bony plates, or a combination of both. They include crocodiles, snakes, alligators, lizards, turtles, and tor- toises. Also dinosaur is a large reptile which appeared 251 million years ago.

5 0
3 years ago
Which part of the cell theory most aligns with the process of Mitosis?
Archy [21]

Answer:

cell division

cell division

3 0
3 years ago
Other questions:
  • What affect will be adding soap to water have on surface tension.
    6·1 answer
  • Elements in the same periodic table wich has the same number of valence electrons
    7·1 answer
  • I need help with number 1. and 2. Plsss
    7·1 answer
  • Which organ contains circular muscles called sphincters that control the release of urine
    12·1 answer
  • Put the steps of binary fission in order from first (1) to last (4)
    6·2 answers
  • Describe how a new mRNA transcript is processed before it leaves the nucleus.
    7·1 answer
  • The base analog 5-bromouracil can tautomerize. one tautomer behaves like thymine and the other behaves like cytosine. if 5-bromo
    5·1 answer
  • There are a number of key enzymes that function in the replication of DNA. Using your book and other resources, identify what th
    12·1 answer
  • What factors determine the shape of a protein molecule?
    9·2 answers
  • How is cytokinesis different in plants and animals?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!