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
A force of 5 N is required to increase the speed of a box from a rate of 1.0 m/s to 3.0 m/s within 5 s along a level surface. Wh
Paraphin [41]

Answer:increase the mass of the box

Explanation:

Big brain

6 0
3 years ago
How are nitrogen, phosphorus, and arsenic similar?
irina1246 [14]
All the three elements belong to the same group in the periodic table, that is Group 15 (Va) of the periodic table. They are also known as Nitrogen group element, others are, antimony, bismuth and moscovium. They share certain general similarities in chemical behavior, which reflect common features of the electronic structures of their atoms. 
Each element occupies the fifth position among the main group elements of its period, a position designated 15. Also they possess an outermost shell of five electrons. Additionally, they have an unshared, or lone pair of electrons which remains after the three covalent bonds, or their equivalent, have been formed. 
6 0
4 years ago
What are the inheritance pattern of a single gene mutation
OLga [1]

Answer:

Not sure

Explanation:

6 0
3 years ago
telophase is a stage of a cellular process that begins after the chromosomes have moved to opposite poles of the cell. During wh
Bogdan [553]

Telophase is the final phase of Mitosis, during which the cytoplasm of the cell divides.  It follows Anaphase and precedes Cytokinesis.

6 0
3 years ago
What is a spore?
vaieri [72.5K]
A spore is <span>a reproductive cell produced by slime molds</span>
6 0
4 years ago
Read 2 more answers
Other questions:
  • Which particular function of nerve cells is facilitated by the unique shape of the cell?
    13·2 answers
  • Which of the following is the most serious effect of water pollution for humans?
    14·2 answers
  • Can someone please help me with number 2? Pleaseeee
    15·1 answer
  • All genetic mutations result in down stream amino acid changes
    14·1 answer
  • Which factors effect earths climate?
    5·1 answer
  • What are 3 interdependent biotic and abiotic features of the Tundra ?
    7·1 answer
  • The last universal common ancestor (LUCA) probably multiplied by duplicating all of its cellular contents, followed by cellular
    5·1 answer
  • Please help!!! Describe what a zygote is
    10·1 answer
  • The various taxonomic levels (for example, phyla, genera, classes) of the hierarchical classification system differ from each ot
    6·1 answer
  • bisphosphoglyceric acid (bpg) is a byproduct of glycolysis released into the bloodstream when an animal's supply of oxygen is lo
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!