Nokea
Which of the following is NOT a typical component of healthy semen?
- A. Sperm
- B. Fructose (sugar)
- C. Prostaglandins
- D. Urine
Correct Answer: D
Rationale: Healthy semen is composed of sperm, fructose (sugar), and prostaglandins. Urine is not a typical component of semen. While semen is ejaculated during sexual activity, urine is expelled through a separate pathway in the male reproductive system. Therefore, the correct answer is 'Urine.' Choices A, B, and C are all components found in healthy semen.
You may also like to solve these questions
What is the term for the shedding of the outermost layer of the epidermis?
- A. Desquamation
- B. Exfoliation
- C. Keratinization
- D. Epidermolysis
Correct Answer: A
Rationale: Desquamation is the correct term for the shedding of the outermost layer of the epidermis. This process is essential for skin renewal, allowing the removal of dead skin cells from the skin's surface. Exfoliation, on the other hand, involves the removal of dead skin cells through mechanical or chemical methods. Keratinization refers to the process where skin cells produce the protein keratin, contributing to the skin's protective barrier. Epidermolysis is a condition characterized by the separation of the epidermis from the dermis due to a structural defect in the skin.
Which neurotransmitter is associated with mood regulation, sleep, and appetite?
- A. Acetylcholine
- B. Dopamine
- C. Serotonin
- D. GABA (Gamma-aminobutyric acid)
Correct Answer: C
Rationale: The correct answer is C: Serotonin. Serotonin is a neurotransmitter that plays a crucial role in mood regulation, sleep, and appetite. It helps regulate emotions, mood, and behavior. Imbalances in serotonin levels have been associated with conditions such as depression, anxiety, and eating disorders.
Choice A, Acetylcholine, is primarily involved in muscle control and memory functions. Choice B, Dopamine, is associated with reward, motivation, and motor control. Choice D, GABA (Gamma-aminobutyric acid), is an inhibitory neurotransmitter that helps reduce neuronal excitability and is not directly linked to mood regulation, sleep, or appetite.
Why is maintaining good muscle strength and flexibility as we age important?
- A. To prevent headaches
- B. To prevent falls
- C. To reduce anxiety
- D. To avoid the common cold
Correct Answer: B
Rationale: Maintaining good muscle strength and flexibility as we age is crucial to prevent falls. Strong muscles and good flexibility help improve balance and stability, reducing the risk of falls, which can lead to serious injuries, especially in older adults. Falls are a significant concern for the elderly population, and preventing them through muscle strength and flexibility can enhance overall quality of life. Headaches are not directly related to muscle strength and flexibility; they can have various causes such as stress, dehydration, or underlying health conditions. Anxiety is a mental health condition and not directly prevented by muscle strength and flexibility. Similarly, the common cold is a viral infection and is not influenced by muscle strength and flexibility.
What is the formula to calculate gravitational potential energy near the Earth's surface?
- A. Potential Energy = Mass Acceleration
- B. Potential Energy = Force Distance
- C. Potential Energy = Mass Height Gravity
- D. Potential Energy = Mass Acceleration due to gravity Height
Correct Answer: D
Rationale: The correct formula to calculate gravitational potential energy near the Earth's surface is Potential Energy = Mass Acceleration due to gravity Height. This formula considers the mass of the object, the specific acceleration due to gravity near the Earth's surface (approximately 9.81 m/s^2), and the vertical distance from the reference point. Choice A is incorrect as it does not include height in the formula. Choice B is incorrect as it involves force instead of acceleration due to gravity. Choice C is incorrect as it multiplies mass, height, and gravity, missing the actual acceleration due to gravity term.
Which of the following is NOT a type of epithelium?
- A. Stratified squamous
- B. Simple cuboidal
- C. Stratified columnar
- D. Pseudostratified columnar
Correct Answer: D
Rationale: The correct answer is D, Pseudostratified columnar. Pseudostratified columnar epithelium is not a type of epithelium. It is a specialized form of simple columnar epithelium. Stratified squamous, simple cuboidal, and stratified columnar are all types of epithelial tissues found in the human body. Stratified squamous epithelium is found in the skin, mouth, and esophagus; simple cuboidal epithelium lines kidney tubules and glands; stratified columnar epithelium is present in parts of the respiratory tract and male urethra.