Nokea
Which of the following hormones helps regulate blood pressure by affecting kidney function?
- A. Insulin
- B. Testosterone
- C. Renin
- D. Estrogen
Correct Answer: C
Rationale: Renin is the hormone that helps regulate blood pressure by affecting kidney function. It is released by the kidneys in response to low blood pressure or low blood volume. Renin plays a crucial role in the renin-angiotensin-aldosterone system, which is responsible for regulating blood pressure and fluid balance in the body. Insulin, testosterone, and estrogen do not directly impact blood pressure regulation through kidney function. Insulin is involved in regulating glucose metabolism, testosterone is a male sex hormone, and estrogen is a female sex hormone. Therefore, the correct answer is Renin (Choice C) because of its specific role in blood pressure regulation through kidney function.
You may also like to solve these questions
Which type of muscle is found in the heart?
- A. Smooth muscle
- B. Cardiac muscle
- C. Skeletal muscle
- D. Voluntary muscle
Correct Answer: B
Rationale: The correct answer is 'B: Cardiac muscle.' Cardiac muscle is the specific type of muscle found in the heart. Unlike smooth muscle and skeletal muscle, cardiac muscle is involuntary and contracts rhythmically to pump blood throughout the body, making it essential for the heart's function. Smooth muscle (Choice A) is found in the walls of hollow organs and blood vessels, while skeletal muscle (Choice C) is attached to bones and responsible for movement. Voluntary muscle (Choice D) is another term for skeletal muscle, which is under conscious control.
In a covalent bond, the shared electrons:
- A. Are completely transferred to one atom.
- B. Spend more time closer to the more electronegative atom.
- C. Remain equidistant between the two atoms.
- D. Do not influence the bond strength.
Correct Answer: B
Rationale: In a covalent bond, the shared electrons spend more time closer to the more electronegative atom. Electronegativity is the ability of an atom to attract electrons in a chemical bond. The more electronegative atom exerts a stronger pull on the shared electrons, causing them to be closer to that atom. Choice A is incorrect because in a covalent bond, electrons are shared, not completely transferred. Choice C is incorrect as the shared electrons are not equidistant but are closer to one atom due to electronegativity differences. Choice D is incorrect because shared electrons play a significant role in determining the bond strength by the strength of the bond formed through electron sharing.
Bile, a yellowish-green fluid, is stored in the gallbladder and released into the small intestine during digestion. What is the primary function of bile in digestion?
- A. Break down carbohydrates
- B. Break down proteins
- C. Emulsify fats
- D. Neutralize stomach acid
Correct Answer: C
Rationale: The primary function of bile in digestion is to emulsify fats. Bile contains bile salts that help break down large fat globules into smaller droplets, increasing the surface area for enzymes to work on and aiding in the absorption of fats in the small intestine. Choices A, B, and D are incorrect because bile's main role is not to break down carbohydrates or proteins, nor to neutralize stomach acid; rather, it primarily assists in the digestion and absorption of fats through emulsification.
What is the correct arrangement of the small intestine segments, from the stomach to the large intestine?
- A. Duodenum, Jejunum, Ileum
- B. Jejunum, Ileum, Duodenum
- C. Ileum, Duodenum, Jejunum
- D. None of the above
Correct Answer: A
Rationale: The correct arrangement of the small intestine segments, from the stomach to the large intestine, is Duodenum, Jejunum, and Ileum. The small intestine begins with the duodenum, then continues to the jejunum, and finally, it ends with the ileum before connecting to the large intestine. Option A, 'Duodenum, Jejunum, Ileum,' is the correct sequence. Choices B and C have the segments in incorrect order, not following the anatomical arrangement of the small intestine. Therefore, they are incorrect. Option D, 'None of the above,' is also incorrect as the correct sequence is provided in option A.
In which direction do the particles of the medium move in a transverse wave?
- A. Perpendicular to the direction of wave travel
- B. Parallel to the direction of wave travel
- C. In a circular motion
- D. Opposite to the direction of wave travel
Correct Answer: A
Rationale: In a transverse wave, the particles of the medium move perpendicular to the direction of wave travel. This means that the particles move up and down or side to side as the wave passes through the medium. This motion creates crests and troughs in the wave, leading to the characteristic oscillation observed in transverse waves. Choice B is incorrect because in transverse waves, the particle movement is not parallel to the direction of wave travel. Choice C is incorrect as the particles do not move in a circular motion in a transverse wave. Choice D is incorrect as the particles do not move opposite to the direction of wave travel; they move perpendicular to it.