Question

After blood in the heart flows out of the right ventricle and through the pulmonary semilunar...

  1. After blood in the heart flows out of the right ventricle and through the pulmonary semilunar valve, what is the next major body structure into which the blood will travel?

    a. Lungs

    b. Arms

    c. Aorta

    d. Brain

1 points   

QUESTION 9

  1. As blood travels from the lungs to the heart, what is the name of the heart structure into which it enters, and what is the blood’s state of oxygenation?

    a. Right atrium, oxygenated

    b. Right atrium, deoxygenated

    c. Left atrium, oxygenated

    d. Left atrium, deoxygenated

  1. Boyle’s law is expressed as follows: (P1V1 = P2V2 or P = 1/V). A rubber ball is filled with air and sealed. According to Boyle’s law, what happens to the pressure inside the ball if you decrease the volume by pushing in the sides?

    a. The pressure increases.

    b. The pressure decreases.

    c. The pressure inside equalizes with the pressure outside.

    d. The pressure forms a gradient.

1 points   

QUESTION 13

  1. The ball from the previous question is stuck with a needle, much like opening the cork from the bell jar model, or puncturing the lungs with a knife. What is the biological name for this scenario when it involves the lungs?

    a. Ventricular hypertrophy

    b. Pneumothorax

    c. Macular degeneration

    d. Hemorrhage

Which of the following structures of the ear is responsible for converting vibration into nerve signals that the human brain interprets as sound?

a. Cochlea

b. Pinna

c. Auditory canal

d. Vestibule

After fertilization, which of the following structures of the human embryo develops that is also present in the embryos of egg-laying animals?

a. Placenta

b. Umbilical cord

c. Mammary glands

d. Yolk sac

Homework Answers

Answer #1

1. Option A, Lungs

Explanation- The blood from the pulmonary semilunar valve is deoxygenated and hence it flows to the lungs and receives its oxygen. Once it replenishes its oxygen, it will drain out of the lungs via the pulmonary veins, and travels to the left atrium

9. Option C, Left atrium, oxygenated

Explanation – Blood from lungs flows into the left atrium i.e the left upper chamber of the heart

Question –

Option A, The pressure increases

Explanation –

As per Boyle’s law, the pressure varies inversely with the volume. Thus, when the ball is squeezed, the volume decreases and hence the pressure increase.

13. Option B, pneumothorax

Explanation –

When a lung is having holes/pores such that the air within the lungs leak out into the space between the lung and chest wall. This scenario is similar to the puncturing of lungs with a knife

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