Midterm Retest 2021

Midterm Retest 2021

M2 Science

Multiple Choice

2. A patient is admitted into the ER after choking on part of his meal. There is nothing blocking the top of his throat when you flash a light in, and he can speak. You put your hand over his mouth when he tries to breathe in, but you don't feel any air going in even though his chest moves up and down. What could be the problem?

• a. His larynx is broken or overused.

• b. There could be a piece of food stuck in his pharynx.

• c. He was allergic to something he ate, and his trachea closed from an allergic reaction.

• d. The patient broke a rib in his chest, which is stopping him from trying to breathe normally.

Multiple Choice

Which of the following statements best describes the picture above?

• a. The diaphragm contracts and moves up, bringing air into the chest.

• b. The diaphragm contracts and moves up, pushing air out of the chest.

• c. The diaphragm relaxes and moves up, bringing air into the chest.

• d. The diaphragm relaxes and moves up, pushing air out of the chest.

Multiple Choice

7. Which of the following is NOT a way that the circulatory system works with the other organ systems to help maintain homeostasis?

• a. The circulatory system delivers urine from the kidney to the bladder.

• b. The circulatory and respiratory systems help remove CO₂ from the body.

• c. The circulatory system transports nutrients from the digestive system to the rest of the body.

• d. The circulatory system works automatically because our heartbeat is controlled by the nervous system.

Multiple Choice

10. A scientist recorded his drinking habits over a day and found that he drank 2.0 L of water, but only urinated 1.7 L of water. Which of the following reasons best describes the difference between how much water he drank and how much he urinated?

• a. His body used the extra 0.3 L of the water to make new blood cells.

• b. The scientist played a game of football that day and lost 0.3 L of water as sweat.

• c. His body is storing the extra 0.3 L of body to use over the next 24 hours as it needs it.

• d. Some water gets destroyed in the creation of urine, and in his case the amount destroyed was 0.3 L.

Multiple Choice

12. A young man was in a crash on his motorbike, but luckily he was wearing a helmet. Although he survived the crash and can think normally, his doctor said that he'll never be able to walk again. What most likely happened?

• a. The feeling portion of the brain stem was crushed in the crash.

• b. He damaged his cerebrum from the impact of his head hitting the ground.

• c. His spine was damaged, stopping communication from the CNS to the PNS.

• d. He damaged his cerebellum in the crash and cannot use it to recall the muscle memory of walking.

Multiple Choice

13. How is the PNS different from the CNS?

• a. The PNS controls organ functions, while the CNS controls muscles.

• b. The PNS receives, stores, and processes information sent to it by the CNS.

• c. The PNS helps transmit information between the CNS and the rest of the body.

• d. The PNS and the CNS have the same functions but are in different parts of the body.

Multiple Choice

14. Which answer best describes the travel of information through neurons in a reflex reaction to a fly landing on a woman's hand?

• a. Receptors in the woman's brain feel the fly land, and immediately send a signal to move the hand.

• b. Receptors in the woman's brain detect the fly and send information to the spinal cord to move her hand.

• c. Receptors in the woman's hand feel the fly land. The nerves in her hand send signals straight to the brain, which sends a signal back to move her hand.

• d. Receptors in the woman's hand detect the fly and send signals to the spinal cord. The spinal cord immediately sends signals back to the hand to cause it to move.

Multiple Choice

16. Why is the midpiece of the sperm so important?

• a. The midpiece contains and protects male DNA.

• b. The midpiece whips back and forth to push the sperm forward.

• c. The midpiece is responsible for releasing chemicals that help the sperm join an egg cell.

• d. The midpiece contains mitochondria, which release energy to power the sperm’s movement.

Multiple Choice

17. Which statement best describes the MAIN purpose of the male reproductive system?

• a. The male reproductive system makes and stores testosterone.

• b. The male reproductive system is important for both reproduction excretion.

• c. The male reproductive system produces sperm for the entire male life cycle.

• d. The male reproductive system delivers genetic material to the female reproductive system.

Multiple Choice

19. Which of the following is statements about the female reproductive system and the male reproductive system is FALSE?

• a. Unlike the male reproductive system, all the female reproductive organs are inside the body.

• b. The female reproductive system produces eggs, and the male reproductive system produces sperm.

• c. Both the male and the female reproductive systems share the urethra with the excretory system to move reproductive cells.

• d. The male reproductive system produces the hormone, testosterone, and the female reproductive system produces the hormone, estrogen.

Multiple Choice

21. In which stage of development does a human offspring form a circulatory system?

• a. Embryo

• b. Fetus

• c. Puberty

• d. Zygote

Multiple Choice

22. In which stage of development do reproductive systems mature?

• a. Embryo

• b. Fetus

• c. Puberty

• d. Zygote

Multiple Choice

23. A doctor performs an ultrasound and finds that the developing baby has reached a length of 5 cm and can move its arms and legs. Which stage of development has the offspring reached?

• a. Embryo

• b. Fetus

• c. Puberty

• d. Zygote

Multiple Choice

24. Which of the following statements best describes the factors that affect a fetus during its development?

• a. Drug and alcohol use by the mother can cause major complications with the fetus.

• b. A fetus can be very negatively affected by loud sounds in the mother’s environment.

• c. Because a fetus is protected by the placenta, a mother can eat anything that she likes without affecting the fetus.

• d. Outside environmental factors like pollution or smoke do not affect the fetus because they are filtered by the respiratory system.

Congrats! You've finished the retest!

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